Sql 返回多个列不不同的所有行/列
我有一个查询,希望在其中查找ActivityDate和TaskId同时具有多个条目的行:Sql 返回多个列不不同的所有行/列,sql,sql-server,Sql,Sql Server,我有一个查询,希望在其中查找ActivityDate和TaskId同时具有多个条目的行: SELECT ActivityDate, taskId FROM [DailyTaskHours] GROUP BY ActivityDate, taskId HAVING COUNT(*) > 1 上述查询似乎有效。但是,我希望所有列现在只返回两个(ActivityDate、taskId)。这不起作用: SELECT * FROM [DailyTaskHo
SELECT
ActivityDate, taskId
FROM
[DailyTaskHours]
GROUP BY
ActivityDate, taskId
HAVING
COUNT(*) > 1
上述查询似乎有效。但是,我希望所有列现在只返回两个(ActivityDate、taskId)。这不起作用:
SELECT *
FROM
[DailyTaskHours]
GROUP BY
ActivityDate, taskId
HAVING
COUNT(*) > 1
因为许多列不在GROUPBY子句中。我不希望任何列受到计数(*)大于1(ActivityDate、taskId除外)的影响
如何实现这一点?以下是显示以下查询的示例:
SELECT DISTINCT m.*
FROM
(
SELECT s.ActivityDate, s.taskId
FROM DailyTaskHours s
GROUP BY s.ActivityDate, s.taskId
HAVING COUNT(*) > 1
) sub
JOIN DailyTaskHours m
ON m.taskId = sub.taskId
AND m.ActivityDate = sub.ActivityDate
您在加入条款中缺少ActivityDate我提供了答案。这恰好与您在大约2000万年前删除的问题的答案完全相同。@Linger我不理解原始查询要求的不同结果。并且假设
dailytaskhurs
有一个主键,这是最佳实践,那么DISTINCT
将没有效果。但是,当然,如果需要,可以很容易地添加DISTINCT
。
WITH sel as(
SELECT
ActivityDate, taskId
FROM
[DailyTaskHours]
GROUP BY
ActivityDate, taskId
HAVING
COUNT(*) > 1
)
SELECT *
FROM [DailyTaskHours] d
INNER JOIN sel ON d.ActivityDate = sel.ActivityDate AND d.taskId = sel.taskId
SELECT t1.*
FROM
[DailyTaskHours] t1
INNER JOIN (
SELECT
ActivityDate, taskId
FROM
[DailyTaskHours]
GROUP BY
ActivityDate, taskId
HAVING
COUNT(*) > 1
) t2 ON (
t1.ActivityDate = t2.ActivityDate AND
t1.taskId = t2.taskId
)
-- fully functional example.
DECLARE @table TABLE ( ActivityDate DATE, TaskID INT);
SET NOCOUNT ON;
INSERT @table VALUES ('01/01/2013',1);
INSERT @table VALUES ('01/02/2013',1);
INSERT @table VALUES ('01/02/2013',2);
INSERT @table VALUES ('01/03/2013',1);
INSERT @table VALUES ('01/03/2013',2);
INSERT @table VALUES ('01/03/2013',5); -- duplicate date,taskid
INSERT @table VALUES ('01/03/2013',5); -- duplicate date,taskid
SET NOCOUNT OFF;
SELECT A.*
FROM @table A
INNER JOIN (
SELECT [ActivityDate], TaskId
FROM @table
GROUP BY [ActivityDate], TaskId
HAVING Count(*) > 1
) AS B ON B.[ActivityDate]=A.ActivityDate AND B.TaskId=A.TaskId;