Select 基于上一个问题答案的 MCQ 答案计数
Select MCQ answer count based on previous question's answer
让我们使用具有以下结构的 PostgreSQL 数据库：
（所有关系从上到下都是OneToMany）
其中一个 Brandlift 总是正好有 2 个 brandlift_question 每个有 1 个 brandlift_answer （本身有很多brandlift_answer_content）by brandlift_respondent
目标：
给定一个'brand'（姑且称之为“旗舰品牌”）
和一个 brandlift.campaign_id,
对于此 品牌提升、
的每个 品牌
按 受访者细分 、
检索
brand.id的计数='answer_content.brand_id'第二个（右）问题 答案,
其中同一受访者的前一个（左）问题答案有一个answer_content.brand_id等于“旗舰品牌”id
示例数据（转储）：
https://dbfiddle.uk/?rdbms=postgres_12&fiddle=a127374b9a327204db40dc9f4e769fc1
-- -- PostgreSQL database dump -- -- Dumped from database version 12.1 -- Dumped by pg_dump version 12.3 SET statement_timeout = 0; SET lock_timeout = 0; SET idle_in_transaction_session_timeout = 0; SET client_encoding = 'UTF8'; SET standard_conforming_strings = on; SELECT pg_catalog.set_config('search_path', '', false); SET check_function_bodies = false; SET xmloption = content; SET client_min_messages = warning; SET row_security = off; SET default_tablespace = ''; SET default_table_access_method = heap; -- -- Name: brandlift; Type: TABLE; Schema: public; Owner: postgres -- CREATE TABLE public.brandlift ( campaign_id uuid NOT NULL, respondent_goal integer NOT NULL ); ALTER TABLE public.brandlift OWNER TO postgres; -- -- Name: COLUMN brandlift.campaign_id; Type: COMMENT; Schema: public; Owner: postgres -- COMMENT ON COLUMN public.brandlift.campaign_id IS '(DC2Type:uuid)'; -- -- Name: brandlift_answer; Type: TABLE; Schema: public; Owner: postgres -- CREATE TABLE public.brandlift_answer ( id integer NOT NULL, question_id uuid NOT NULL, respondent_id integer NOT NULL ); ALTER TABLE public.brandlift_answer OWNER TO postgres; -- -- Name: COLUMN brandlift_answer.question_id; Type: COMMENT; Schema: public; Owner: postgres -- COMMENT ON COLUMN public.brandlift_answer.question_id IS '(DC2Type:uuid)'; -- -- Name: brandlift_answer_content; Type: TABLE; Schema: public; Owner: postgres -- CREATE TABLE public.brandlift_answer_content ( id integer NOT NULL, answer_id integer NOT NULL, brand_id integer ); ALTER TABLE public.brandlift_answer_content OWNER TO postgres; -- -- Name: brandlift_answer_content_id_seq; Type: SEQUENCE; Schema: public; Owner: postgres -- CREATE SEQUENCE public.brandlift_answer_content_id_seq START WITH 1 INCREMENT BY 1 NO MINVALUE NO MAXVALUE CACHE 1; ALTER TABLE public.brandlift_answer_content_id_seq OWNER TO postgres; -- -- Name: brandlift_answer_id_seq; Type: SEQUENCE; Schema: public; Owner: postgres -- CREATE SEQUENCE public.brandlift_answer_id_seq START WITH 1 INCREMENT BY 1 NO MINVALUE NO MAXVALUE CACHE 1; ALTER TABLE public.brandlift_answer_id_seq OWNER TO postgres; -- -- Name: brandlift_brand; Type: TABLE; Schema: public; Owner: postgres -- CREATE TABLE public.brandlift_brand ( id integer NOT NULL, campaign_id uuid NOT NULL, name character varying(255) NOT NULL ); ALTER TABLE public.brandlift_brand OWNER TO postgres; -- -- Name: COLUMN brandlift_brand.campaign_id; Type: COMMENT; Schema: public; Owner: postgres -- COMMENT ON COLUMN public.brandlift_brand.campaign_id IS '(DC2Type:uuid)'; -- -- Name: brandlift_brand_id_seq; Type: SEQUENCE; Schema: public; Owner: postgres -- CREATE SEQUENCE public.brandlift_brand_id_seq START WITH 1 INCREMENT BY 1 NO MINVALUE NO MAXVALUE CACHE 1; ALTER TABLE public.brandlift_brand_id_seq OWNER TO postgres; -- -- Name: brandlift_question; Type: TABLE; Schema: public; Owner: postgres -- CREATE TABLE public.brandlift_question ( id uuid NOT NULL, campaign_id uuid NOT NULL, title character varying(255) NOT NULL ); ALTER TABLE public.brandlift_question OWNER TO postgres; -- -- Name: COLUMN brandlift_question.id; Type: COMMENT; Schema: public; Owner: postgres -- COMMENT ON COLUMN public.brandlift_question.id IS '(DC2Type:uuid)'; -- -- Name: COLUMN brandlift_question.campaign_id; Type: COMMENT; Schema: public; Owner: postgres -- COMMENT ON COLUMN public.brandlift_question.campaign_id IS '(DC2Type:uuid)'; -- -- Name: brandlift_respondent; Type: TABLE; Schema: public; Owner: postgres -- CREATE TABLE public.brandlift_respondent ( id integer NOT NULL, campaign_id uuid NOT NULL, segment_id integer NOT NULL, aam_uuid character varying(255) DEFAULT NULL::character varying, "timestamp" timestamp(0) without time zone NOT NULL ); ALTER TABLE public.brandlift_respondent OWNER TO postgres; -- -- Name: COLUMN brandlift_respondent.campaign_id; Type: COMMENT; Schema: public; Owner: postgres -- COMMENT ON COLUMN public.brandlift_respondent.campaign_id IS '(DC2Type:uuid)'; -- -- Name: brandlift_respondent_id_seq; Type: SEQUENCE; Schema: public; Owner: postgres -- CREATE SEQUENCE public.brandlift_respondent_id_seq START WITH 1 INCREMENT BY 1 NO MINVALUE NO MAXVALUE CACHE 1; ALTER TABLE public.brandlift_respondent_id_seq OWNER TO postgres; -- -- Name: brandlift_segment; Type: TABLE; Schema: public; Owner: postgres -- CREATE TABLE public.brandlift_segment ( id integer NOT NULL, name character varying(255) NOT NULL ); ALTER TABLE public.brandlift_segment OWNER TO postgres; -- -- Name: brandlift_segment_id_seq; Type: SEQUENCE; Schema: public; Owner: postgres -- CREATE SEQUENCE public.brandlift_segment_id_seq START WITH 1 INCREMENT BY 1 NO MINVALUE NO MAXVALUE CACHE 1; ALTER TABLE public.brandlift_segment_id_seq OWNER TO postgres; -- -- Name: campaign; Type: TABLE; Schema: public; Owner: postgres -- CREATE TABLE public.campaign ( id uuid NOT NULL, format_id integer NOT NULL, advertiser character varying(255) NOT NULL, name character varying(255) NOT NULL, date_start timestamp(0) without time zone NOT NULL, date_end timestamp(0) without time zone NOT NULL ); ALTER TABLE public.campaign OWNER TO postgres; -- -- Name: COLUMN campaign.id; Type: COMMENT; Schema: public; Owner: postgres -- COMMENT ON COLUMN public.campaign.id IS '(DC2Type:uuid)'; -- -- Name: doctrine_migration_versions; Type: TABLE; Schema: public; Owner: postgres -- CREATE TABLE public.doctrine_migration_versions ( version character varying(191) NOT NULL, executed_at timestamp(0) without time zone DEFAULT NULL::timestamp without time zone, execution_time integer ); ALTER TABLE public.doctrine_migration_versions OWNER TO postgres; -- -- Name: format; Type: TABLE; Schema: public; Owner: postgres -- CREATE TABLE public.format ( id integer NOT NULL, name character varying(255) NOT NULL ); ALTER TABLE public.format OWNER TO postgres; -- -- Name: format_id_seq; Type: SEQUENCE; Schema: public; Owner: postgres -- CREATE SEQUENCE public.format_id_seq START WITH 1 INCREMENT BY 1 NO MINVALUE NO MAXVALUE CACHE 1; ALTER TABLE public.format_id_seq OWNER TO postgres; -- -- Data for Name: brandlift; Type: TABLE DATA; Schema: public; Owner: postgres -- COPY public.brandlift (campaign_id, respondent_goal) FROM stdin; 8d8c79ce-188c-4f5e-bd72-edb854faf34c 500 \. -- -- Data for Name: brandlift_answer; Type: TABLE DATA; Schema: public; Owner: postgres -- COPY public.brandlift_answer (id, question_id, respondent_id) FROM stdin; 28 6d6596f4-9418-4f76-9234-c3c943ca56cf 18 29 c84760de-be6f-4f8e-be32-9195846307cf 18 30 6d6596f4-9418-4f76-9234-c3c943ca56cf 19 31 c84760de-be6f-4f8e-be32-9195846307cf 19 32 6d6596f4-9418-4f76-9234-c3c943ca56cf 20 33 c84760de-be6f-4f8e-be32-9195846307cf 20 34 6d6596f4-9418-4f76-9234-c3c943ca56cf 21 35 c84760de-be6f-4f8e-be32-9195846307cf 21 36 6d6596f4-9418-4f76-9234-c3c943ca56cf 22 37 c84760de-be6f-4f8e-be32-9195846307cf 22 \. -- -- Data for Name: brandlift_answer_content; Type: TABLE DATA; Schema: public; Owner: postgres -- COPY public.brandlift_answer_content (id, answer_id, brand_id) FROM stdin; 54 28 5 55 28 7 56 29 5 57 29 8 58 30 5 59 30 7 60 31 7 61 31 5 62 32 5 63 32 7 64 33 6 65 33 7 66 33 8 67 34 7 68 34 5 69 35 6 70 35 7 71 35 8 72 36 7 73 36 5 74 37 6 75 37 7 \. -- -- Data for Name: brandlift_brand; Type: TABLE DATA; Schema: public; Owner: postgres -- COPY public.brandlift_brand (id, campaign_id, name) FROM stdin; 5 8d8c79ce-188c-4f5e-bd72-edb854faf34c Nike 6 8d8c79ce-188c-4f5e-bd72-edb854faf34c Adidas 7 8d8c79ce-188c-4f5e-bd72-edb854faf34c Lacoste 8 8d8c79ce-188c-4f5e-bd72-edb854faf34c Puma \. -- -- Data for Name: brandlift_question; Type: TABLE DATA; Schema: public; Owner: postgres -- COPY public.brandlift_question (id, campaign_id, title) FROM stdin; 6d6596f4-9418-4f76-9234-c3c943ca56cf 8d8c79ce-188c-4f5e-bd72-edb854faf34c Parmi les propositions suivantes, pour lesquelles avez-vous vu de la publicité vidéo en ligne au cours du dernier mois ? c84760de-be6f-4f8e-be32-9195846307cf 8d8c79ce-188c-4f5e-bd72-edb854faf34c Si vous deviez prochainement choisir une marque de streetwear la ou lesquelles choisiriez-vous ? \. -- -- Data for Name: brandlift_respondent; Type: TABLE DATA; Schema: public; Owner: postgres -- COPY public.brandlift_respondent (id, campaign_id, segment_id, aam_uuid, "timestamp") FROM stdin; 10 8d8c79ce-188c-4f5e-bd72-edb854faf34c 3 912407327014 2021-02-01 18:04:43 11 8d8c79ce-188c-4f5e-bd72-edb854faf34c 3 2692416912404 2021-02-01 18:06:01 12 8d8c79ce-188c-4f5e-bd72-edb854faf34c 4 9741094120421 2021-02-01 18:06:56 13 8d8c79ce-188c-4f5e-bd72-edb854faf34c 4 8973093247093 2021-02-01 18:07:59 14 8d8c79ce-188c-4f5e-bd72-edb854faf34c 4 2147124472178421 2021-02-01 18:08:34 15 8d8c79ce-188c-4f5e-bd72-edb854faf34c 4 2147124472178421 2021-02-01 18:09:20 16 8d8c79ce-188c-4f5e-bd72-edb854faf34c 4 23253532532352 2021-02-01 18:09:53 17 8d8c79ce-188c-4f5e-bd72-edb854faf34c 3 357325732577352 2021-02-01 18:20:01 18 8d8c79ce-188c-4f5e-bd72-edb854faf34c 3 357325732577352 2021-02-01 18:21:12 19 8d8c79ce-188c-4f5e-bd72-edb854faf34c 3 4354646464223 2021-02-01 18:22:14 20 8d8c79ce-188c-4f5e-bd72-edb854faf34c 4 6855985895808 2021-02-01 18:25:41 21 8d8c79ce-188c-4f5e-bd72-edb854faf34c 4 6855985895808 2021-02-01 18:26:03 22 8d8c79ce-188c-4f5e-bd72-edb854faf34c 4 6855985895808 2021-02-01 18:26:33 \. -- -- Data for Name: brandlift_segment; Type: TABLE DATA; Schema: public; Owner: postgres -- COPY public.brandlift_segment (id, name) FROM stdin; 3 expo 4 no expo \. -- -- Data for Name: campaign; Type: TABLE DATA; Schema: public; Owner: postgres -- COPY public.campaign (id, format_id, advertiser, name, date_start, date_end) FROM stdin; 8d8c79ce-188c-4f5e-bd72-edb854faf34c 2 Nike Air Max 270 2021-01-25 00:00:00 2021-02-28 00:00:00 \. -- -- Data for Name: doctrine_migration_versions; Type: TABLE DATA; Schema: public; Owner: postgres -- COPY public.doctrine_migration_versions (version, executed_at, execution_time) FROM stdin; DoctrineMigrations\Version20210131122327 2021-01-31 13:23:34 199 \. -- -- Data for Name: format; Type: TABLE DATA; Schema: public; Owner: postgres -- COPY public.format (id, name) FROM stdin; 2 Brandlift \. -- -- Name: brandlift_answer_content_id_seq; Type: SEQUENCE SET; Schema: public; Owner: postgres -- SELECT pg_catalog.setval('public.brandlift_answer_content_id_seq', 75, true); -- -- Name: brandlift_answer_id_seq; Type: SEQUENCE SET; Schema: public; Owner: postgres -- SELECT pg_catalog.setval('public.brandlift_answer_id_seq', 37, true); -- -- Name: brandlift_brand_id_seq; Type: SEQUENCE SET; Schema: public; Owner: postgres -- SELECT pg_catalog.setval('public.brandlift_brand_id_seq', 8, true); -- -- Name: brandlift_respondent_id_seq; Type: SEQUENCE SET; Schema: public; Owner: postgres -- SELECT pg_catalog.setval('public.brandlift_respondent_id_seq', 22, true); -- -- Name: brandlift_segment_id_seq; Type: SEQUENCE SET; Schema: public; Owner: postgres -- SELECT pg_catalog.setval('public.brandlift_segment_id_seq', 4, true); -- -- Name: format_id_seq; Type: SEQUENCE SET; Schema: public; Owner: postgres -- SELECT pg_catalog.setval('public.format_id_seq', 2, true); -- -- Name: brandlift_answer_content brandlift_answer_content_pkey; Type: CONSTRAINT; Schema: public; Owner: postgres -- ALTER TABLE ONLY public.brandlift_answer_content ADD CONSTRAINT brandlift_answer_content_pkey PRIMARY KEY (id); -- -- Name: brandlift_answer brandlift_answer_pkey; Type: CONSTRAINT; Schema: public; Owner: postgres -- ALTER TABLE ONLY public.brandlift_answer ADD CONSTRAINT brandlift_answer_pkey PRIMARY KEY (id); -- -- Name: brandlift_brand brandlift_brand_pkey; Type: CONSTRAINT; Schema: public; Owner: postgres -- ALTER TABLE ONLY public.brandlift_brand ADD CONSTRAINT brandlift_brand_pkey PRIMARY KEY (id); -- -- Name: brandlift brandlift_pkey; Type: CONSTRAINT; Schema: public; Owner: postgres -- ALTER TABLE ONLY public.brandlift ADD CONSTRAINT brandlift_pkey PRIMARY KEY (campaign_id); -- -- Name: brandlift_question brandlift_question_pkey; Type: CONSTRAINT; Schema: public; Owner: postgres -- ALTER TABLE ONLY public.brandlift_question ADD CONSTRAINT brandlift_question_pkey PRIMARY KEY (id); -- -- Name: brandlift_respondent brandlift_respondent_pkey; Type: CONSTRAINT; Schema: public; Owner: postgres -- ALTER TABLE ONLY public.brandlift_respondent ADD CONSTRAINT brandlift_respondent_pkey PRIMARY KEY (id); -- -- Name: brandlift_segment brandlift_segment_pkey; Type: CONSTRAINT; Schema: public; Owner: postgres -- ALTER TABLE ONLY public.brandlift_segment ADD CONSTRAINT brandlift_segment_pkey PRIMARY KEY (id); -- -- Name: campaign campaign_pkey; Type: CONSTRAINT; Schema: public; Owner: postgres -- ALTER TABLE ONLY public.campaign ADD CONSTRAINT campaign_pkey PRIMARY KEY (id); -- -- Name: doctrine_migration_versions doctrine_migration_versions_pkey; Type: CONSTRAINT; Schema: public; Owner: postgres -- ALTER TABLE ONLY public.doctrine_migration_versions ADD CONSTRAINT doctrine_migration_versions_pkey PRIMARY KEY (version); -- -- Name: format format_pkey; Type: CONSTRAINT; Schema: public; Owner: postgres -- ALTER TABLE ONLY public.format ADD CONSTRAINT format_pkey PRIMARY KEY (id); -- -- Name: answer_content_unique; Type: INDEX; Schema: public; Owner: postgres -- CREATE UNIQUE INDEX answer_content_unique ON public.brandlift_answer_content USING btree (answer_id, brand_id); -- -- Name: answer_unique; Type: INDEX; Schema: public; Owner: postgres -- CREATE UNIQUE INDEX answer_unique ON public.brandlift_answer USING btree (question_id, respondent_id); -- -- Name: idx_1f1512ddd629f605; Type: INDEX; Schema: public; Owner: postgres -- CREATE INDEX idx_1f1512ddd629f605 ON public.campaign USING btree (format_id); -- -- Name: idx_3be90c3a44f5d008; Type: INDEX; Schema: public; Owner: postgres -- CREATE INDEX idx_3be90c3a44f5d008 ON public.brandlift_answer_content USING btree (brand_id); -- -- Name: idx_3be90c3aaa334807; Type: INDEX; Schema: public; Owner: postgres -- CREATE INDEX idx_3be90c3aaa334807 ON public.brandlift_answer_content USING btree (answer_id); -- -- Name: idx_80d627bdf639f774; Type: INDEX; Schema: public; Owner: postgres -- CREATE INDEX idx_80d627bdf639f774 ON public.brandlift_question USING btree (campaign_id); -- -- Name: idx_d5009950db296aad; Type: INDEX; Schema: public; Owner: postgres -- CREATE INDEX idx_d5009950db296aad ON public.brandlift_respondent USING btree (segment_id); -- -- Name: idx_d5009950f639f774; Type: INDEX; Schema: public; Owner: postgres -- CREATE INDEX idx_d5009950f639f774 ON public.brandlift_respondent USING btree (campaign_id); -- -- Name: idx_d671e368f639f774; Type: INDEX; Schema: public; Owner: postgres -- CREATE INDEX idx_d671e368f639f774 ON public.brandlift_brand USING btree (campaign_id); -- -- Name: idx_fcce59931e27f6bf; Type: INDEX; Schema: public; Owner: postgres -- CREATE INDEX idx_fcce59931e27f6bf ON public.brandlift_answer USING btree (question_id); -- -- Name: idx_fcce5993ce80cd19; Type: INDEX; Schema: public; Owner: postgres -- CREATE INDEX idx_fcce5993ce80cd19 ON public.brandlift_answer USING btree (respondent_id); -- -- Name: campaign fk_1f1512ddd629f605; Type: FK CONSTRAINT; Schema: public; Owner: postgres -- ALTER TABLE ONLY public.campaign ADD CONSTRAINT fk_1f1512ddd629f605 FOREIGN KEY (format_id) REFERENCES public.format(id); -- -- Name: brandlift_answer_content fk_3be90c3a44f5d008; Type: FK CONSTRAINT; Schema: public; Owner: postgres -- ALTER TABLE ONLY public.brandlift_answer_content ADD CONSTRAINT fk_3be90c3a44f5d008 FOREIGN KEY (brand_id) REFERENCES public.brandlift_brand(id); -- -- Name: brandlift_answer_content fk_3be90c3aaa334807; Type: FK CONSTRAINT; Schema: public; Owner: postgres -- ALTER TABLE ONLY public.brandlift_answer_content ADD CONSTRAINT fk_3be90c3aaa334807 FOREIGN KEY (answer_id) REFERENCES public.brandlift_answer(id); -- -- Name: brandlift fk_5b5d1287f639f774; Type: FK CONSTRAINT; Schema: public; Owner: postgres -- ALTER TABLE ONLY public.brandlift ADD CONSTRAINT fk_5b5d1287f639f774 FOREIGN KEY (campaign_id) REFERENCES public.campaign(id); -- -- Name: brandlift_question fk_80d627bdf639f774; Type: FK CONSTRAINT; Schema: public; Owner: postgres -- ALTER TABLE ONLY public.brandlift_question ADD CONSTRAINT fk_80d627bdf639f774 FOREIGN KEY (campaign_id) REFERENCES public.brandlift(campaign_id); -- -- Name: brandlift_respondent fk_d5009950db296aad; Type: FK CONSTRAINT; Schema: public; Owner: postgres -- ALTER TABLE ONLY public.brandlift_respondent ADD CONSTRAINT fk_d5009950db296aad FOREIGN KEY (segment_id) REFERENCES public.brandlift_segment(id); -- -- Name: brandlift_respondent fk_d5009950f639f774; Type: FK CONSTRAINT; Schema: public; Owner: postgres -- ALTER TABLE ONLY public.brandlift_respondent ADD CONSTRAINT fk_d5009950f639f774 FOREIGN KEY (campaign_id) REFERENCES public.brandlift(campaign_id); -- -- Name: brandlift_brand fk_d671e368f639f774; Type: FK CONSTRAINT; Schema: public; Owner: postgres -- ALTER TABLE ONLY public.brandlift_brand ADD CONSTRAINT fk_d671e368f639f774 FOREIGN KEY (campaign_id) REFERENCES public.brandlift(campaign_id); -- -- Name: brandlift_answer fk_fcce59931e27f6bf; Type: FK CONSTRAINT; Schema: public; Owner: postgres -- ALTER TABLE ONLY public.brandlift_answer ADD CONSTRAINT fk_fcce59931e27f6bf FOREIGN KEY (question_id) REFERENCES public.brandlift_question(id); -- -- Name: brandlift_answer fk_fcce5993ce80cd19; Type: FK CONSTRAINT; Schema: public; Owner: postgres -- ALTER TABLE ONLY public.brandlift_answer ADD CONSTRAINT fk_fcce5993ce80cd19 FOREIGN KEY (respondent_id) REFERENCES public.brandlift_respondent(id); -- -- PostgreSQL database dump complete --
期望的输出：
campaign_id => 8d8c79ce-188c-4f5e-bd72-edb854faf34c
"旗舰品牌" => Nike (id=5)
brand_name
segment_name
count
Adidas
expo
0
Adidas
no expo
3
Lacoste
expo
1
Lacoste
no expo
3
Nike
expo
2
Nike
no expo
0
Puma
expo
1
Puma
no expo
2
更新：
最后在 brandlift_question table 中添加了一个 'ordinal' 列，这样以后如果我不得不在 Brandlift 中添加更多问题，我可以比较基于其他问题索引的答案，而不仅仅是在第一和第二之间
SELECT
bb.name AS brand_name,
s.name AS segment_name,
COUNT(q2ac.brand_id)
FROM
brandlift b
LEFT JOIN brandlift_brand bb ON b.campaign_id = bb.campaign_id
LEFT JOIN brandlift_respondent r ON b.campaign_id = r.campaign_id
LEFT JOIN brandlift_segment s ON s.id = r.segment_id
LEFT JOIN brandlift_question q1 ON b.campaign_id = q1.campaign_id AND q1.ordinal = 1
LEFT JOIN brandlift_answer q1a ON r.id = q1a.respondent_id AND q1.id = q1a.question_id
INNER JOIN brandlift_answer_content q1ac ON q1a.id = q1ac.answer_id AND q1ac.brand_id = 5 -- the "flagship brand" id
LEFT JOIN brandlift_question q2 ON q1.campaign_id = q2.campaign_id AND q2.ordinal = 2
INNER JOIN brandlift_answer q2a ON q1a.respondent_id = q2a.respondent_id AND q2.id = q2a.question_id
LEFT JOIN brandlift_answer_content q2ac ON q2a.id = q2ac.answer_id AND bb.id = q2ac.brand_id
WHERE
b.campaign_id = '8d8c79ce-188c-4f5e-bd72-edb854faf34c'
GROUP BY
bb.name,
s.name
但还有一点，如果某个段上没有受访者，则此查询的结果输出将不包含该段值填充为 0 的行。如果可能，也需要它们
我渴望得到任何建议
如果您不想 mod，则需要 select questionID。
我使用 cross join 来获取其他一些没有响应的部分。在 select 语句中，您 case 语句将 segmentName 计数为 0.
SELECT
bb.name,
s.name,
CASE WHEN s.id IN(
SELECT
r.segment_id FROM brandlift_respondent r) THEN
COUNT(q2ac.brand_id)
ELSE
0
END AS CountNumber
FROM
brandlift b
LEFT JOIN brandlift_brand bb ON b.campaign_id = bb.campaign_id
LEFT JOIN brandlift_respondent r ON b.campaign_id = r.campaign_id
CROSS JOIN brandlift_segment s
LEFT JOIN brandlift_question q1 ON b.campaign_id = q1.campaign_id AND q1.ordinal = 1
LEFT JOIN brandlift_answer q1a ON r.id = q1a.respondent_id AND q1.id = q1a.question_id
INNER JOIN brandlift_answer_content q1ac ON q1a.id = q1ac.answer_id AND q1ac.brand_id = 1 -- the "flagship brand" id
LEFT JOIN brandlift_question q2 ON q1.campaign_id = q2.campaign_id AND q2.ordinal = 2
LEFT JOIN brandlift_answer q2a ON q1a.respondent_id = q2a.respondent_id AND q2.id = q2a.question_id
LEFT JOIN brandlift_answer_content q2ac ON q2a.id = q2ac.answer_id AND bb.id = q2ac.brand_id
WHERE
b.campaign_id = :campaign_id -- parameter
AND R.segment_id = s.id OR s.id NOT IN(SELECT r.segment_id FROM brandlift_respondent r)
GROUP BY
bb.name,
s.name,
s.id
结果就是这样
让我们使用具有以下结构的 PostgreSQL 数据库：
其中一个 Brandlift 总是正好有 2 个 brandlift_question 每个有 1 个 brandlift_answer （本身有很多brandlift_answer_content）by brandlift_respondent
目标：
给定一个'brand'（姑且称之为“旗舰品牌”）
和一个 brandlift.campaign_id,
对于此 品牌提升、
的每个 品牌
按 受访者细分 、
检索
brand.id的计数='answer_content.brand_id'第二个（右）问题 答案,
其中同一受访者的前一个（左）问题答案有一个answer_content.brand_id等于“旗舰品牌”id
示例数据（转储）：
https://dbfiddle.uk/?rdbms=postgres_12&fiddle=a127374b9a327204db40dc9f4e769fc1
-- -- PostgreSQL database dump -- -- Dumped from database version 12.1 -- Dumped by pg_dump version 12.3 SET statement_timeout = 0; SET lock_timeout = 0; SET idle_in_transaction_session_timeout = 0; SET client_encoding = 'UTF8'; SET standard_conforming_strings = on; SELECT pg_catalog.set_config('search_path', '', false); SET check_function_bodies = false; SET xmloption = content; SET client_min_messages = warning; SET row_security = off; SET default_tablespace = ''; SET default_table_access_method = heap; -- -- Name: brandlift; Type: TABLE; Schema: public; Owner: postgres -- CREATE TABLE public.brandlift ( campaign_id uuid NOT NULL, respondent_goal integer NOT NULL ); ALTER TABLE public.brandlift OWNER TO postgres; -- -- Name: COLUMN brandlift.campaign_id; Type: COMMENT; Schema: public; Owner: postgres -- COMMENT ON COLUMN public.brandlift.campaign_id IS '(DC2Type:uuid)'; -- -- Name: brandlift_answer; Type: TABLE; Schema: public; Owner: postgres -- CREATE TABLE public.brandlift_answer ( id integer NOT NULL, question_id uuid NOT NULL, respondent_id integer NOT NULL ); ALTER TABLE public.brandlift_answer OWNER TO postgres; -- -- Name: COLUMN brandlift_answer.question_id; Type: COMMENT; Schema: public; Owner: postgres -- COMMENT ON COLUMN public.brandlift_answer.question_id IS '(DC2Type:uuid)'; -- -- Name: brandlift_answer_content; Type: TABLE; Schema: public; Owner: postgres -- CREATE TABLE public.brandlift_answer_content ( id integer NOT NULL, answer_id integer NOT NULL, brand_id integer ); ALTER TABLE public.brandlift_answer_content OWNER TO postgres; -- -- Name: brandlift_answer_content_id_seq; Type: SEQUENCE; Schema: public; Owner: postgres -- CREATE SEQUENCE public.brandlift_answer_content_id_seq START WITH 1 INCREMENT BY 1 NO MINVALUE NO MAXVALUE CACHE 1; ALTER TABLE public.brandlift_answer_content_id_seq OWNER TO postgres; -- -- Name: brandlift_answer_id_seq; Type: SEQUENCE; Schema: public; Owner: postgres -- CREATE SEQUENCE public.brandlift_answer_id_seq START WITH 1 INCREMENT BY 1 NO MINVALUE NO MAXVALUE CACHE 1; ALTER TABLE public.brandlift_answer_id_seq OWNER TO postgres; -- -- Name: brandlift_brand; Type: TABLE; Schema: public; Owner: postgres -- CREATE TABLE public.brandlift_brand ( id integer NOT NULL, campaign_id uuid NOT NULL, name character varying(255) NOT NULL ); ALTER TABLE public.brandlift_brand OWNER TO postgres; -- -- Name: COLUMN brandlift_brand.campaign_id; Type: COMMENT; Schema: public; Owner: postgres -- COMMENT ON COLUMN public.brandlift_brand.campaign_id IS '(DC2Type:uuid)'; -- -- Name: brandlift_brand_id_seq; Type: SEQUENCE; Schema: public; Owner: postgres -- CREATE SEQUENCE public.brandlift_brand_id_seq START WITH 1 INCREMENT BY 1 NO MINVALUE NO MAXVALUE CACHE 1; ALTER TABLE public.brandlift_brand_id_seq OWNER TO postgres; -- -- Name: brandlift_question; Type: TABLE; Schema: public; Owner: postgres -- CREATE TABLE public.brandlift_question ( id uuid NOT NULL, campaign_id uuid NOT NULL, title character varying(255) NOT NULL ); ALTER TABLE public.brandlift_question OWNER TO postgres; -- -- Name: COLUMN brandlift_question.id; Type: COMMENT; Schema: public; Owner: postgres -- COMMENT ON COLUMN public.brandlift_question.id IS '(DC2Type:uuid)'; -- -- Name: COLUMN brandlift_question.campaign_id; Type: COMMENT; Schema: public; Owner: postgres -- COMMENT ON COLUMN public.brandlift_question.campaign_id IS '(DC2Type:uuid)'; -- -- Name: brandlift_respondent; Type: TABLE; Schema: public; Owner: postgres -- CREATE TABLE public.brandlift_respondent ( id integer NOT NULL, campaign_id uuid NOT NULL, segment_id integer NOT NULL, aam_uuid character varying(255) DEFAULT NULL::character varying, "timestamp" timestamp(0) without time zone NOT NULL ); ALTER TABLE public.brandlift_respondent OWNER TO postgres; -- -- Name: COLUMN brandlift_respondent.campaign_id; Type: COMMENT; Schema: public; Owner: postgres -- COMMENT ON COLUMN public.brandlift_respondent.campaign_id IS '(DC2Type:uuid)'; -- -- Name: brandlift_respondent_id_seq; Type: SEQUENCE; Schema: public; Owner: postgres -- CREATE SEQUENCE public.brandlift_respondent_id_seq START WITH 1 INCREMENT BY 1 NO MINVALUE NO MAXVALUE CACHE 1; ALTER TABLE public.brandlift_respondent_id_seq OWNER TO postgres; -- -- Name: brandlift_segment; Type: TABLE; Schema: public; Owner: postgres -- CREATE TABLE public.brandlift_segment ( id integer NOT NULL, name character varying(255) NOT NULL ); ALTER TABLE public.brandlift_segment OWNER TO postgres; -- -- Name: brandlift_segment_id_seq; Type: SEQUENCE; Schema: public; Owner: postgres -- CREATE SEQUENCE public.brandlift_segment_id_seq START WITH 1 INCREMENT BY 1 NO MINVALUE NO MAXVALUE CACHE 1; ALTER TABLE public.brandlift_segment_id_seq OWNER TO postgres; -- -- Name: campaign; Type: TABLE; Schema: public; Owner: postgres -- CREATE TABLE public.campaign ( id uuid NOT NULL, format_id integer NOT NULL, advertiser character varying(255) NOT NULL, name character varying(255) NOT NULL, date_start timestamp(0) without time zone NOT NULL, date_end timestamp(0) without time zone NOT NULL ); ALTER TABLE public.campaign OWNER TO postgres; -- -- Name: COLUMN campaign.id; Type: COMMENT; Schema: public; Owner: postgres -- COMMENT ON COLUMN public.campaign.id IS '(DC2Type:uuid)'; -- -- Name: doctrine_migration_versions; Type: TABLE; Schema: public; Owner: postgres -- CREATE TABLE public.doctrine_migration_versions ( version character varying(191) NOT NULL, executed_at timestamp(0) without time zone DEFAULT NULL::timestamp without time zone, execution_time integer ); ALTER TABLE public.doctrine_migration_versions OWNER TO postgres; -- -- Name: format; Type: TABLE; Schema: public; Owner: postgres -- CREATE TABLE public.format ( id integer NOT NULL, name character varying(255) NOT NULL ); ALTER TABLE public.format OWNER TO postgres; -- -- Name: format_id_seq; Type: SEQUENCE; Schema: public; Owner: postgres -- CREATE SEQUENCE public.format_id_seq START WITH 1 INCREMENT BY 1 NO MINVALUE NO MAXVALUE CACHE 1; ALTER TABLE public.format_id_seq OWNER TO postgres; -- -- Data for Name: brandlift; Type: TABLE DATA; Schema: public; Owner: postgres -- COPY public.brandlift (campaign_id, respondent_goal) FROM stdin; 8d8c79ce-188c-4f5e-bd72-edb854faf34c 500 \. -- -- Data for Name: brandlift_answer; Type: TABLE DATA; Schema: public; Owner: postgres -- COPY public.brandlift_answer (id, question_id, respondent_id) FROM stdin; 28 6d6596f4-9418-4f76-9234-c3c943ca56cf 18 29 c84760de-be6f-4f8e-be32-9195846307cf 18 30 6d6596f4-9418-4f76-9234-c3c943ca56cf 19 31 c84760de-be6f-4f8e-be32-9195846307cf 19 32 6d6596f4-9418-4f76-9234-c3c943ca56cf 20 33 c84760de-be6f-4f8e-be32-9195846307cf 20 34 6d6596f4-9418-4f76-9234-c3c943ca56cf 21 35 c84760de-be6f-4f8e-be32-9195846307cf 21 36 6d6596f4-9418-4f76-9234-c3c943ca56cf 22 37 c84760de-be6f-4f8e-be32-9195846307cf 22 \. -- -- Data for Name: brandlift_answer_content; Type: TABLE DATA; Schema: public; Owner: postgres -- COPY public.brandlift_answer_content (id, answer_id, brand_id) FROM stdin; 54 28 5 55 28 7 56 29 5 57 29 8 58 30 5 59 30 7 60 31 7 61 31 5 62 32 5 63 32 7 64 33 6 65 33 7 66 33 8 67 34 7 68 34 5 69 35 6 70 35 7 71 35 8 72 36 7 73 36 5 74 37 6 75 37 7 \. -- -- Data for Name: brandlift_brand; Type: TABLE DATA; Schema: public; Owner: postgres -- COPY public.brandlift_brand (id, campaign_id, name) FROM stdin; 5 8d8c79ce-188c-4f5e-bd72-edb854faf34c Nike 6 8d8c79ce-188c-4f5e-bd72-edb854faf34c Adidas 7 8d8c79ce-188c-4f5e-bd72-edb854faf34c Lacoste 8 8d8c79ce-188c-4f5e-bd72-edb854faf34c Puma \. -- -- Data for Name: brandlift_question; Type: TABLE DATA; Schema: public; Owner: postgres -- COPY public.brandlift_question (id, campaign_id, title) FROM stdin; 6d6596f4-9418-4f76-9234-c3c943ca56cf 8d8c79ce-188c-4f5e-bd72-edb854faf34c Parmi les propositions suivantes, pour lesquelles avez-vous vu de la publicité vidéo en ligne au cours du dernier mois ? c84760de-be6f-4f8e-be32-9195846307cf 8d8c79ce-188c-4f5e-bd72-edb854faf34c Si vous deviez prochainement choisir une marque de streetwear la ou lesquelles choisiriez-vous ? \. -- -- Data for Name: brandlift_respondent; Type: TABLE DATA; Schema: public; Owner: postgres -- COPY public.brandlift_respondent (id, campaign_id, segment_id, aam_uuid, "timestamp") FROM stdin; 10 8d8c79ce-188c-4f5e-bd72-edb854faf34c 3 912407327014 2021-02-01 18:04:43 11 8d8c79ce-188c-4f5e-bd72-edb854faf34c 3 2692416912404 2021-02-01 18:06:01 12 8d8c79ce-188c-4f5e-bd72-edb854faf34c 4 9741094120421 2021-02-01 18:06:56 13 8d8c79ce-188c-4f5e-bd72-edb854faf34c 4 8973093247093 2021-02-01 18:07:59 14 8d8c79ce-188c-4f5e-bd72-edb854faf34c 4 2147124472178421 2021-02-01 18:08:34 15 8d8c79ce-188c-4f5e-bd72-edb854faf34c 4 2147124472178421 2021-02-01 18:09:20 16 8d8c79ce-188c-4f5e-bd72-edb854faf34c 4 23253532532352 2021-02-01 18:09:53 17 8d8c79ce-188c-4f5e-bd72-edb854faf34c 3 357325732577352 2021-02-01 18:20:01 18 8d8c79ce-188c-4f5e-bd72-edb854faf34c 3 357325732577352 2021-02-01 18:21:12 19 8d8c79ce-188c-4f5e-bd72-edb854faf34c 3 4354646464223 2021-02-01 18:22:14 20 8d8c79ce-188c-4f5e-bd72-edb854faf34c 4 6855985895808 2021-02-01 18:25:41 21 8d8c79ce-188c-4f5e-bd72-edb854faf34c 4 6855985895808 2021-02-01 18:26:03 22 8d8c79ce-188c-4f5e-bd72-edb854faf34c 4 6855985895808 2021-02-01 18:26:33 \. -- -- Data for Name: brandlift_segment; Type: TABLE DATA; Schema: public; Owner: postgres -- COPY public.brandlift_segment (id, name) FROM stdin; 3 expo 4 no expo \. -- -- Data for Name: campaign; Type: TABLE DATA; Schema: public; Owner: postgres -- COPY public.campaign (id, format_id, advertiser, name, date_start, date_end) FROM stdin; 8d8c79ce-188c-4f5e-bd72-edb854faf34c 2 Nike Air Max 270 2021-01-25 00:00:00 2021-02-28 00:00:00 \. -- -- Data for Name: doctrine_migration_versions; Type: TABLE DATA; Schema: public; Owner: postgres -- COPY public.doctrine_migration_versions (version, executed_at, execution_time) FROM stdin; DoctrineMigrations\Version20210131122327 2021-01-31 13:23:34 199 \. -- -- Data for Name: format; Type: TABLE DATA; Schema: public; Owner: postgres -- COPY public.format (id, name) FROM stdin; 2 Brandlift \. -- -- Name: brandlift_answer_content_id_seq; Type: SEQUENCE SET; Schema: public; Owner: postgres -- SELECT pg_catalog.setval('public.brandlift_answer_content_id_seq', 75, true); -- -- Name: brandlift_answer_id_seq; Type: SEQUENCE SET; Schema: public; Owner: postgres -- SELECT pg_catalog.setval('public.brandlift_answer_id_seq', 37, true); -- -- Name: brandlift_brand_id_seq; Type: SEQUENCE SET; Schema: public; Owner: postgres -- SELECT pg_catalog.setval('public.brandlift_brand_id_seq', 8, true); -- -- Name: brandlift_respondent_id_seq; Type: SEQUENCE SET; Schema: public; Owner: postgres -- SELECT pg_catalog.setval('public.brandlift_respondent_id_seq', 22, true); -- -- Name: brandlift_segment_id_seq; Type: SEQUENCE SET; Schema: public; Owner: postgres -- SELECT pg_catalog.setval('public.brandlift_segment_id_seq', 4, true); -- -- Name: format_id_seq; Type: SEQUENCE SET; Schema: public; Owner: postgres -- SELECT pg_catalog.setval('public.format_id_seq', 2, true); -- -- Name: brandlift_answer_content brandlift_answer_content_pkey; Type: CONSTRAINT; Schema: public; Owner: postgres -- ALTER TABLE ONLY public.brandlift_answer_content ADD CONSTRAINT brandlift_answer_content_pkey PRIMARY KEY (id); -- -- Name: brandlift_answer brandlift_answer_pkey; Type: CONSTRAINT; Schema: public; Owner: postgres -- ALTER TABLE ONLY public.brandlift_answer ADD CONSTRAINT brandlift_answer_pkey PRIMARY KEY (id); -- -- Name: brandlift_brand brandlift_brand_pkey; Type: CONSTRAINT; Schema: public; Owner: postgres -- ALTER TABLE ONLY public.brandlift_brand ADD CONSTRAINT brandlift_brand_pkey PRIMARY KEY (id); -- -- Name: brandlift brandlift_pkey; Type: CONSTRAINT; Schema: public; Owner: postgres -- ALTER TABLE ONLY public.brandlift ADD CONSTRAINT brandlift_pkey PRIMARY KEY (campaign_id); -- -- Name: brandlift_question brandlift_question_pkey; Type: CONSTRAINT; Schema: public; Owner: postgres -- ALTER TABLE ONLY public.brandlift_question ADD CONSTRAINT brandlift_question_pkey PRIMARY KEY (id); -- -- Name: brandlift_respondent brandlift_respondent_pkey; Type: CONSTRAINT; Schema: public; Owner: postgres -- ALTER TABLE ONLY public.brandlift_respondent ADD CONSTRAINT brandlift_respondent_pkey PRIMARY KEY (id); -- -- Name: brandlift_segment brandlift_segment_pkey; Type: CONSTRAINT; Schema: public; Owner: postgres -- ALTER TABLE ONLY public.brandlift_segment ADD CONSTRAINT brandlift_segment_pkey PRIMARY KEY (id); -- -- Name: campaign campaign_pkey; Type: CONSTRAINT; Schema: public; Owner: postgres -- ALTER TABLE ONLY public.campaign ADD CONSTRAINT campaign_pkey PRIMARY KEY (id); -- -- Name: doctrine_migration_versions doctrine_migration_versions_pkey; Type: CONSTRAINT; Schema: public; Owner: postgres -- ALTER TABLE ONLY public.doctrine_migration_versions ADD CONSTRAINT doctrine_migration_versions_pkey PRIMARY KEY (version); -- -- Name: format format_pkey; Type: CONSTRAINT; Schema: public; Owner: postgres -- ALTER TABLE ONLY public.format ADD CONSTRAINT format_pkey PRIMARY KEY (id); -- -- Name: answer_content_unique; Type: INDEX; Schema: public; Owner: postgres -- CREATE UNIQUE INDEX answer_content_unique ON public.brandlift_answer_content USING btree (answer_id, brand_id); -- -- Name: answer_unique; Type: INDEX; Schema: public; Owner: postgres -- CREATE UNIQUE INDEX answer_unique ON public.brandlift_answer USING btree (question_id, respondent_id); -- -- Name: idx_1f1512ddd629f605; Type: INDEX; Schema: public; Owner: postgres -- CREATE INDEX idx_1f1512ddd629f605 ON public.campaign USING btree (format_id); -- -- Name: idx_3be90c3a44f5d008; Type: INDEX; Schema: public; Owner: postgres -- CREATE INDEX idx_3be90c3a44f5d008 ON public.brandlift_answer_content USING btree (brand_id); -- -- Name: idx_3be90c3aaa334807; Type: INDEX; Schema: public; Owner: postgres -- CREATE INDEX idx_3be90c3aaa334807 ON public.brandlift_answer_content USING btree (answer_id); -- -- Name: idx_80d627bdf639f774; Type: INDEX; Schema: public; Owner: postgres -- CREATE INDEX idx_80d627bdf639f774 ON public.brandlift_question USING btree (campaign_id); -- -- Name: idx_d5009950db296aad; Type: INDEX; Schema: public; Owner: postgres -- CREATE INDEX idx_d5009950db296aad ON public.brandlift_respondent USING btree (segment_id); -- -- Name: idx_d5009950f639f774; Type: INDEX; Schema: public; Owner: postgres -- CREATE INDEX idx_d5009950f639f774 ON public.brandlift_respondent USING btree (campaign_id); -- -- Name: idx_d671e368f639f774; Type: INDEX; Schema: public; Owner: postgres -- CREATE INDEX idx_d671e368f639f774 ON public.brandlift_brand USING btree (campaign_id); -- -- Name: idx_fcce59931e27f6bf; Type: INDEX; Schema: public; Owner: postgres -- CREATE INDEX idx_fcce59931e27f6bf ON public.brandlift_answer USING btree (question_id); -- -- Name: idx_fcce5993ce80cd19; Type: INDEX; Schema: public; Owner: postgres -- CREATE INDEX idx_fcce5993ce80cd19 ON public.brandlift_answer USING btree (respondent_id); -- -- Name: campaign fk_1f1512ddd629f605; Type: FK CONSTRAINT; Schema: public; Owner: postgres -- ALTER TABLE ONLY public.campaign ADD CONSTRAINT fk_1f1512ddd629f605 FOREIGN KEY (format_id) REFERENCES public.format(id); -- -- Name: brandlift_answer_content fk_3be90c3a44f5d008; Type: FK CONSTRAINT; Schema: public; Owner: postgres -- ALTER TABLE ONLY public.brandlift_answer_content ADD CONSTRAINT fk_3be90c3a44f5d008 FOREIGN KEY (brand_id) REFERENCES public.brandlift_brand(id); -- -- Name: brandlift_answer_content fk_3be90c3aaa334807; Type: FK CONSTRAINT; Schema: public; Owner: postgres -- ALTER TABLE ONLY public.brandlift_answer_content ADD CONSTRAINT fk_3be90c3aaa334807 FOREIGN KEY (answer_id) REFERENCES public.brandlift_answer(id); -- -- Name: brandlift fk_5b5d1287f639f774; Type: FK CONSTRAINT; Schema: public; Owner: postgres -- ALTER TABLE ONLY public.brandlift ADD CONSTRAINT fk_5b5d1287f639f774 FOREIGN KEY (campaign_id) REFERENCES public.campaign(id); -- -- Name: brandlift_question fk_80d627bdf639f774; Type: FK CONSTRAINT; Schema: public; Owner: postgres -- ALTER TABLE ONLY public.brandlift_question ADD CONSTRAINT fk_80d627bdf639f774 FOREIGN KEY (campaign_id) REFERENCES public.brandlift(campaign_id); -- -- Name: brandlift_respondent fk_d5009950db296aad; Type: FK CONSTRAINT; Schema: public; Owner: postgres -- ALTER TABLE ONLY public.brandlift_respondent ADD CONSTRAINT fk_d5009950db296aad FOREIGN KEY (segment_id) REFERENCES public.brandlift_segment(id); -- -- Name: brandlift_respondent fk_d5009950f639f774; Type: FK CONSTRAINT; Schema: public; Owner: postgres -- ALTER TABLE ONLY public.brandlift_respondent ADD CONSTRAINT fk_d5009950f639f774 FOREIGN KEY (campaign_id) REFERENCES public.brandlift(campaign_id); -- -- Name: brandlift_brand fk_d671e368f639f774; Type: FK CONSTRAINT; Schema: public; Owner: postgres -- ALTER TABLE ONLY public.brandlift_brand ADD CONSTRAINT fk_d671e368f639f774 FOREIGN KEY (campaign_id) REFERENCES public.brandlift(campaign_id); -- -- Name: brandlift_answer fk_fcce59931e27f6bf; Type: FK CONSTRAINT; Schema: public; Owner: postgres -- ALTER TABLE ONLY public.brandlift_answer ADD CONSTRAINT fk_fcce59931e27f6bf FOREIGN KEY (question_id) REFERENCES public.brandlift_question(id); -- -- Name: brandlift_answer fk_fcce5993ce80cd19; Type: FK CONSTRAINT; Schema: public; Owner: postgres -- ALTER TABLE ONLY public.brandlift_answer ADD CONSTRAINT fk_fcce5993ce80cd19 FOREIGN KEY (respondent_id) REFERENCES public.brandlift_respondent(id); -- -- PostgreSQL database dump complete --
期望的输出：
campaign_id => 8d8c79ce-188c-4f5e-bd72-edb854faf34c
"旗舰品牌" => Nike (id=5)
| brand_name | segment_name | count |
|---|---|---|
| Adidas | expo | 0 |
| Adidas | no expo | 3 |
| Lacoste | expo | 1 |
| Lacoste | no expo | 3 |
| Nike | expo | 2 |
| Nike | no expo | 0 |
| Puma | expo | 1 |
| Puma | no expo | 2 |
更新：
最后在 brandlift_question table 中添加了一个 'ordinal' 列，这样以后如果我不得不在 Brandlift 中添加更多问题，我可以比较基于其他问题索引的答案，而不仅仅是在第一和第二之间
SELECT
bb.name AS brand_name,
s.name AS segment_name,
COUNT(q2ac.brand_id)
FROM
brandlift b
LEFT JOIN brandlift_brand bb ON b.campaign_id = bb.campaign_id
LEFT JOIN brandlift_respondent r ON b.campaign_id = r.campaign_id
LEFT JOIN brandlift_segment s ON s.id = r.segment_id
LEFT JOIN brandlift_question q1 ON b.campaign_id = q1.campaign_id AND q1.ordinal = 1
LEFT JOIN brandlift_answer q1a ON r.id = q1a.respondent_id AND q1.id = q1a.question_id
INNER JOIN brandlift_answer_content q1ac ON q1a.id = q1ac.answer_id AND q1ac.brand_id = 5 -- the "flagship brand" id
LEFT JOIN brandlift_question q2 ON q1.campaign_id = q2.campaign_id AND q2.ordinal = 2
INNER JOIN brandlift_answer q2a ON q1a.respondent_id = q2a.respondent_id AND q2.id = q2a.question_id
LEFT JOIN brandlift_answer_content q2ac ON q2a.id = q2ac.answer_id AND bb.id = q2ac.brand_id
WHERE
b.campaign_id = '8d8c79ce-188c-4f5e-bd72-edb854faf34c'
GROUP BY
bb.name,
s.name
但还有一点，如果某个段上没有受访者，则此查询的结果输出将不包含该段值填充为 0 的行。如果可能，也需要它们
我渴望得到任何建议
如果您不想 mod，则需要 select questionID。 我使用 cross join 来获取其他一些没有响应的部分。在 select 语句中，您 case 语句将 segmentName 计数为 0.
SELECT
bb.name,
s.name,
CASE WHEN s.id IN(
SELECT
r.segment_id FROM brandlift_respondent r) THEN
COUNT(q2ac.brand_id)
ELSE
0
END AS CountNumber
FROM
brandlift b
LEFT JOIN brandlift_brand bb ON b.campaign_id = bb.campaign_id
LEFT JOIN brandlift_respondent r ON b.campaign_id = r.campaign_id
CROSS JOIN brandlift_segment s
LEFT JOIN brandlift_question q1 ON b.campaign_id = q1.campaign_id AND q1.ordinal = 1
LEFT JOIN brandlift_answer q1a ON r.id = q1a.respondent_id AND q1.id = q1a.question_id
INNER JOIN brandlift_answer_content q1ac ON q1a.id = q1ac.answer_id AND q1ac.brand_id = 1 -- the "flagship brand" id
LEFT JOIN brandlift_question q2 ON q1.campaign_id = q2.campaign_id AND q2.ordinal = 2
LEFT JOIN brandlift_answer q2a ON q1a.respondent_id = q2a.respondent_id AND q2.id = q2a.question_id
LEFT JOIN brandlift_answer_content q2ac ON q2a.id = q2ac.answer_id AND bb.id = q2ac.brand_id
WHERE
b.campaign_id = :campaign_id -- parameter
AND R.segment_id = s.id OR s.id NOT IN(SELECT r.segment_id FROM brandlift_respondent r)
GROUP BY
bb.name,
s.name,
s.id
结果就是这样