连接 json 个值的数组 PostgreSQL

Question

下面有一个table

Column	Type
id	integer
caseworker	uuid
data	jsonb

其中包含以下数据

id	caseworker	data
1	sally	{"CaseNumber": "001","claimant": "Barbara","Location": "Manchester","unavailableDates": [{"id": "0372d8d7-2778-4175-8826-xxxxxxxxxxb0","value": "2022-01-24"},{"id": "f7f83778-7ab1-4b33-abe5-xxxxxxxxxxf4","value": "2022-01-25"}]"defense":{"defendant": "Mariah","Location": "Manchester","unavailableDates": [{"id": "0372d8d7-2778-4175-8826-xxxxxxxxxxz0","value": "2022-01-24"},{"id": "0372d8d7-2778-4175-8826-xxxxxxxxxxz1","value": "2022-01-25"},{"id": "f7f83778-7ab1-4b33-abe5-xxxxxxxxxxz4","value": "2022-01-26"}]}}
2	jason	{"CaseNumber": "002","claimant": "Michael","Location": "London","unavailableDates": [{"id": "0372d8d7-2778-4175-8826-xxxxxxxxxxb1","value": "2022-02-24"},{"id": "f7f83778-7ab1-4b33-abe5-xxxxxxxxxxf5","value": "2022-02-25"}]"defense":{"defendant": "Killian","Location": "London","unavailableDates": [{"id": "0372d8d7-2778-4175-8826-xxxxxxxxxxz1","value": "2022-02-24"},{"id": "0372d8d7-2778-4175-8826-xxxxxxxxxxz2","value": "2022-02-25"},{"id": "f7f83778-7ab1-4b33-abe5-xxxxxxxxxxz5","value": "2022-02-26"}]}}
3	william	{"CaseNumber": "003","claimant": "Lisa","Location": "Birmingham","defense":{"defendant": "Larry","Location": "London","unavailableDates": {"id": "0372d8d7-2778-4175-8826-xxxxxxxxxxz2","value": "2022-02-24"},{"id": "0372d8d7-2778-4175-8826-xxxxxxxxxxz3","value": "2022-02-25"},{"id": "f7f837787ab1-4b33-abe5-xxxxxxxxxxz6","value": "2022-02-26"}]}}
4	ricky	{"CaseNumber": "004","claimant": "Leon","Location": "Isle of Man","unavailableDates": [{"id": "0372d8d7-2778-4175-8826-xxxxxxxxxxz3","value": "2022-02-24"},{"id": "0372d8d7-2778-4175-8826-xxxxxxxxxxz5","value": "2022-02-25"},{"id": "f7f83778-7ab1-4b33-abe5-xxxxxxxxxxz7","value": "2022-02-26"}]"defense":{"defendant": "Cillian","Location": "Birmingham",}}
5	megan	{"CaseNumber": "005","claimant": "Gavin","Location": "Bristol","defense":{"defendant": "John","Location": "Isle of Man",}}

我对 PostgreSQL 查询和 JSON 还很陌生，希望获得如下所示的输出。是否可以在 单个查询 中完成（如果不行，可以使用 WITH AS () 创建 'temp' table 然后查询那个临时 table)？我一直在玩 STRING_AGG 和 jsonb_array_elements 但我无法得到低于我想要的输出.

caseworker	Case Number	Claimant	Clm_Loc	Clm_Unavail_Dates	Defendant	Def_Loc	Def_Unavail_Dates
sally	001	Barbara	Manchester	"2022-01-24", "2022-01-25"	Mariah	Manchester	"2022-01-24", "2022-01-25", "2022-01-26"
jason	002	Michael	London	"2022-02-24", "2022-02-25"	Killian	London	"2022-02-24", "2022-02-25", "2022-02-26"
william	003	Lisa	Birmingham		Larry	London	"2022-02-24", "2022-02-25", "2022-02-26"
ricky	004	Leon	Isle of Man	"2022-02-24", "2022-02-25", "2022-02-26"	Cillian	Birmingham
megan	005	Gavin	Bristol		John	Isle of Man

希望有人能帮忙:)。

Answer 1

如果您可以接受 JSON 日期数组，这很容易。

使用->>将键值提取为字符串。可以使用 jsonb_path_query_array()

将日期提取为 JSON 数组

select caseworker, 
       data ->> 'CaseNumber' as casenumber,
       data ->> 'claimant' as claimant,
       data ->> 'Location' as clm_loc, 
       jsonb_path_query_array(data, '$.unavailableDates.value') as Clm_Unavail_Dates,
       data -> 'defense' ->> 'defendant' as defendant,
       data -> 'defense' ->> 'Location' as def_loc,
       jsonb_path_query_array(data, '$.defense.unavailableDates.value') as Def_Unavail_Dates
from the_table

Online example

连接 json 个值的数组 PostgreSQL

Concatenate array of json values PostgreSQL

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