我在sql Server Express 2005中进行分组时遇到问题
@H_404_2@我有一个DATETIME COLUMN,但我只想按日期分组.
@H_404_2@这是我的sql语句：
SELECT (u.FirstName + ' ' + u.LastName) AS [FullName],d.user_id,CONVERT(varchar,d.log_date,101) AS log_date,min(d.login_time) as LOG_IN,max(d.logout_time) as LOG_OUT,sum(d.totaltime) as TOTHrs FROM tbldtr d INNER JOIN tblUsers u ON d.user_id = u.User_Id WHERE d.user_id = 'ADMIN1' and d.log_date BETWEEN '6/1/2013' AND '6/15/2013' GROUP BY DATEADD(day,DATEDIFF(day,log_date),0),u.FirstName,u.LastName,d.user_id order by d.log_date asc@H_404_2@但它给了我这个错误：
@H_404_2@Column ‘tbldtr.log_date’ is invalid in the select list because it is not contained in either an aggregate function or the GROUP BY@H_404_2@提前致谢.！
clause.
解决方法
只需将convert(varchar,101)移动到group by子句中：
select
u.FirstName + ' ' + u.LastName as [FullName],convert(varchar,101) as log_date,sum(d.totaltime) as TOTHrs
from tbldtr d
inner join tblUsers u on d.user_id = u.User_Id
where d.user_id = 'ADMIN1' and d.log_date between '20130601' AND '20130615'
group by
convert(varchar,101),d.user_id
order by log_date asc
@H_404_2@此外,将其中的日期更改为明确的格式–YYYYMMDD更安全
