Distinct where 语句被破坏

Question

从这个数据库结构...

CREATE TABLE points (
    rowid INTEGER PRIMARY KEY,
    powId INTEGER,
    userId INTEGER,
    timeStart DATETIME,
    timeEnd DATETIME,
    points NUMERIC,
    COUNTYNUM NUMERIC,
--  FOREIGN KEY(powId) REFERENCES points_power(powId)
--  FOREIGN KEY(userId) REFERENCES users(userId)
    UNIQUE(userId, timeStart, COUNTYNUM) ON CONFLICT IGNORE
);

有了这个数据...

INSERT INTO "points" ("rowid","powId","userId","timeStart","timeEnd","points","COUNTYNUM") VALUES ('1','7','2','2016-12-31T19:29:23-0500','2016-12-31T20:29:23-0500','2','201612311929');
INSERT INTO "points" ("rowid","powId","userId","timeStart","timeEnd","points","COUNTYNUM") VALUES ('2','7','4','2016-12-31T19:29:23-0500','2016-12-31T20:29:23-0500','2','201612311929');
INSERT INTO "points" ("rowid","powId","userId","timeStart","timeEnd","points","COUNTYNUM") VALUES ('3','7','12','2016-12-31T19:29:23-0500','2016-12-31T20:29:23-0500','2','201612311929');
INSERT INTO "points" ("rowid","powId","userId","timeStart","timeEnd","points","COUNTYNUM") VALUES ('4','7','16','2016-12-31T19:29:23-0500','2016-12-31T20:29:23-0500','2','201612311929');
INSERT INTO "points" ("rowid","powId","userId","timeStart","timeEnd","points","COUNTYNUM") VALUES ('5','7','585','2017-01-02T15:46:07-0500','2017-01-02T16:46:07-0500','2','201701021546');
INSERT INTO "points" ("rowid","powId","userId","timeStart","timeEnd","points","COUNTYNUM") VALUES ('6','7','2','2017-01-02T15:46:07-0500','2017-01-02T16:46:07-0500','2','201701021546');
INSERT INTO "points" ("rowid","powId","userId","timeStart","timeEnd","points","COUNTYNUM") VALUES ('7','7','12','2017-01-02T15:46:07-0500','2017-01-02T16:46:07-0500','2','201701021546');
INSERT INTO "points" ("rowid","powId","userId","timeStart","timeEnd","points","COUNTYNUM") VALUES ('9','7','11','2017-01-02T15:46:07-0500','2017-01-02T16:46:07-0500','2','201701021546');
INSERT INTO "points" ("rowid","powId","userId","timeStart","timeEnd","points","COUNTYNUM") VALUES ('10','7','593','2017-01-02T15:46:07-0500','2017-01-02T16:46:07-0500','2','201701021546');
INSERT INTO "points" ("rowid","powId","userId","timeStart","timeEnd","points","COUNTYNUM") VALUES ('11','7','14','2017-01-02T15:46:07-0500','2017-01-02T16:46:07-0500','2','201701021546');
INSERT INTO "points" ("rowid","powId","userId","timeStart","timeEnd","points","COUNTYNUM") VALUES ('12','7','13','2017-01-02T15:46:07-0500','2017-01-02T16:46:07-0500','2','201701021546');
INSERT INTO "points" ("rowid","powId","userId","timeStart","timeEnd","points","COUNTYNUM") VALUES ('13','7','11','2017-01-02T13:50:48-0500','2017-01-02T14:50:48-0500','2','201701021350');
INSERT INTO "points" ("rowid","powId","userId","timeStart","timeEnd","points","COUNTYNUM") VALUES ('14','7','16','2017-01-02T15:46:07-0500','2017-01-02T16:46:07-0500','2','201701021546');
INSERT INTO "points" ("rowid","powId","userId","timeStart","timeEnd","points","COUNTYNUM") VALUES ('15','7','16','2017-01-01T00:33:46-0500','2017-01-01T01:33:46-0500','2','201701010033');
INSERT INTO "points" ("rowid","powId","userId","timeStart","timeEnd","points","COUNTYNUM") VALUES ('16','7','2','2017-01-02T13:50:48-0500','2017-01-02T14:50:48-0500','2','201701021350');
INSERT INTO "points" ("rowid","powId","userId","timeStart","timeEnd","points","COUNTYNUM") VALUES ('17','13','1','2017-01-02T17:00:00-0500','2017-01-02T21:00:00-0500','1',NULL);
INSERT INTO "points" ("rowid","powId","userId","timeStart","timeEnd","points","COUNTYNUM") VALUES ('18','13','2','2017-01-02T17:00:00-0500','2017-01-02T21:00:00-0500','1',NULL);

并使用此查询

SELECT DISTINCT powId, timeStart, timeEnd FROM points WHERE userId != 1;

我没有得到想要的结果。

我现在正在查看的数据库中的最后两个条目。 userId 是为这两个条目中的第一个设置的，但是第二个条目屏蔽了 userId 并且它现在仍然是 return 那个不同的行。有什么我可以对该查询做的，使它不是 return 任何不同的行，其中 userId 在 DISTINCT 集中？

我基本上想获得 userId 未分配的所有点数。我怎么做？我以为会这么简单，但事实并非如此。

拜托，只有 SQLite 回答。

Answer 1

您必须检查具有相同列值的所有（其他）行：

SELECT DISTINCT powId,
                timeStart,
                timeEnd
FROM points
WHERE NOT EXISTS (SELECT 1
                  FROM points AS p2
                  WHERE p2.powId     = points.powId
                    AND p2.timeStart = points.timeStart
                    AND p2.timeEnd   = points.timeEnd
                    AND p2.userId = 1);

Distinct where 语句被破坏

Distinct where statement getting clobbered

sqlite

distinct

where