带有where子句的SQL更新具有group by和having语句
我正在尝试更新与WHERE子句条件匹配的所有行上的导出列,而它正在更新所有行 这是我到目前为止所拥有的带有where子句的SQL更新具有group by和having语句,sql,sql-server,Sql,Sql Server,我正在尝试更新与WHERE子句条件匹配的所有行上的导出列,而它正在更新所有行 这是我到目前为止所拥有的 Create table Temp ( Employeeid nvarchar(10), Punchtype nvarchar (2), Date Date, TotalTime decimal (16,2), Job nvarchar(10), Exported bit not null Default 0) Insert Into Temp (Employe
Create table Temp (
Employeeid nvarchar(10),
Punchtype nvarchar (2),
Date Date,
TotalTime decimal (16,2),
Job nvarchar(10),
Exported bit not null Default 0)
Insert Into Temp (Employeeid,Punchtype,Date,TotalTime,Job)
Values ('1234','C','4/24/2017',4,'J1234'), ('1234','RW','4/24/2017',4,'J1234'),('4563','C','4/24/2017',2,'J1234'), ('4563','C','4/24/2017',5,'J1234')
Update temp set exported = 1 where exists ( select null from temp group by employeeid,Date,Job having Min(punchtype) = MAX(punchtype))
您可以使用
CTE
和窗口功能:
WITH CTE AS
(
SELECT *,
MIN(punchtype)
OVER(PARTITION BY employeeid, [Date], Job) Min_punchtype,
MAX(punchtype)
OVER(PARTITION BY employeeid, [Date], Job) Max_punchtype
FROM Temp
)
UPDATE CTE
SET exported = 1
WHERE Min_punchtype = Max_punchtype
;
您可以使用
CTE
和窗口功能:
WITH CTE AS
(
SELECT *,
MIN(punchtype)
OVER(PARTITION BY employeeid, [Date], Job) Min_punchtype,
MAX(punchtype)
OVER(PARTITION BY employeeid, [Date], Job) Max_punchtype
FROM Temp
)
UPDATE CTE
SET exported = 1
WHERE Min_punchtype = Max_punchtype
;
请尝试使用此更新:
Update temp set exported = 1 where temp.Employeeid = ( select temp.Employeeid from temp group by employeeid,Date,Job having Min(punchtype) = MAX(punchtype) );
请尝试使用此更新:
Update temp set exported = 1 where temp.Employeeid = ( select temp.Employeeid from temp group by employeeid,Date,Job having Min(punchtype) = MAX(punchtype) );