Question

我的查询：

$result->error

结果：

with 
  CTE (CardID,Name,Surname,Department,CurrentDate,Time_In,Time_Out) as (
    select CardID, Name, Surname, Department, convert(char, pocdate, 106) as CurrentDate,
           case when GateID in (1,6) then min(convert(char,pocdate,108)) else '' end as Time_In,
           case when GateID in (2,5) then max(convert(char,pocdate,108)) else '' end as Time_Out     
      from tblEmployee
     where Name = 'erdal'
     group by CardID,Name,Surname,Department,GateID,pocdate
)
select CardID,Name,Surname,Department,CurrentDate,Time_In,Time_Out
from CTE
group by CardID,Name,Surname,Department,CurrentDate,Time_In,Time_Out     
order by CardID asc;

有没有办法只找到最低CardID Name Surname Department CurrentDate Time_In Time_Out --------- ------- --------- ------------ ------------- ----------- ---------- 6672983 ERDAL HUZMELI IT 11-Jan-16 12:41:32 6672983 ERDAL HUZMELI IT 11-Jan-16 17:38:21 6672983 ERDAL HUZMELI IT 11-Jan-16 08:01:53 6672983 ERDAL HUZMELI IT 11-Jan-16 08:03:24 6672983 ERDAL HUZMELI IT 11-Jan-16 13:22:22 6672983 ERDAL HUZMELI IT 11-Jan-16 13:26:47 6672983 ERDAL HUZMELI IT 11-Jan-16 17:36:46和最高Time_In，如下所示？

Time_Out

Answer 1

您的查询似乎不需要CTE。您只需一步即可完成聚合。你想要的是条件聚合：

Select CardID, Name, Surname, Department,
       convert(varchar(32), pocdate, 106) as CurrentDate,
       min(case when GateID in (1, 6) then convert(varchar(32), pocdate, 108))     
           end) as Time_In,
       max(case when GateID in (2, 5) then convert(varchar(32), pocdate, 108))     
           end) as Time_Out
from tblEmployee
where Name = 'erdal'
group by CardID, Name, Surname ,Department, kGateID,
         convert(varchar(32), pocdate, 106);

注意：在SQL Server中，使用varchar()和char()时，始终应包含长度。默认值因上下文而异，具体取决于默认值可能会导致难以调试的错误。

得到最小和最大日期

1 个答案: