Question

在我的查询下。我选择这种方式按姓名计算所有工作。

SELECT COUNT(sy.FullName)                        [Count Job],
       sy.FullName                               [FullName],
       MIN(CAST(i.vrp_notificationdate AS DATE)) [Oldest Date]
FROM   BusinessUnit AS b
       INNER JOIN SystemUser AS sy
         ON b.BusinessUnitId = sy.BusinessUnitId
       INNER JOIN Incident AS i
         ON i.OwnerId = sy.SystemUserId
GROUP  BY f.sy.FullName

此查询显示此表

---------------------------------
Count Job   FullName  Oldest Date
  10           a       2011-10-11
  20           B       2011-10-11
  55           C       2011-10-11
---------------------------------

但我想以下表为例。

--------------------------------------------------------------
Count Job   FullName  Oldest Date      Open Job         Close Job
  10           A       2011-10-11         5                5  
  20           B       2011-10-11         13               7 
  55           C       2011-10-11         48               7
------------------------------------------------------------

我的事件表上有columnname的状态，如果状态代码是5，则作业被关闭。当我按条件状态代码使用group，然后table就在。我不想显示这个显示表。

---------------------------------
Count Job   FullName  Oldest Date
  10           a       2011-10-11
  13           B       2011-10-11
  48           C       2011-10-11
  7            B       2011-10-11
  7            C       2011-10-11
---------------------------------

当我在我的t-sql上使用union时，我接受此错误“使用UNION，INTERSECT或EXCEPT运算符组合的所有查询必须在其目标列表中具有相同数量的表达式。”

如何准确解决此问题。任何建议。

感谢。

Answer 1

如何使用CASE和SUM？

SELECT COUNT(sy.FullName)                        [Count Job],
       sy.FullName                               [FullName],
       MIN(CAST(i.vrp_notificationdate AS DATE)) [Oldest Date],

       SUM(CASE i.status 
             WHEN 5 THEN 1
             ELSE 0)                             [Open Jobs],

       SUM(CASE i.status 
            WHEN 5 THEN 0
            ELSE 1)                              [Closed Jobs]

FROM   BusinessUnit AS b
       INNER JOIN SystemUser AS sy
         ON b.BusinessUnitId = sy.BusinessUnitId
       INNER JOIN Incident AS i
         ON i.OwnerId = sy.SystemUserId
GROUP  BY f.sy.FullName

t-sql子查询和group by

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