SQL Union和分组依据（按特定值分组，但显示全部）

Question

如何将此表与特定的按值分组。我需要按“完成日期”，“ ETR日期”，“设备名称”，“项目”和“操作员姓名”将其分组，但需要在同一行中显示“ ETR实际小时数”，“完成实际小时数”等。

这是我的示例查询。

SELECT * FROM
(
   SELECT '' as AccomplishmentDate, ETRDate, ProjectName,EquipmentName, 0 as 
        AccomplishmentActualHour, ETRActualHour FROM Table1

   UNION

   SELECT AccomplishmentDate, '' as ETRDate, ProjectName,,EquipmentName,
        AccomplishmentActualHour,0 as ETRActualHour FROM Table1

)as Transaction

Answer 1

选择所需的名称或列。不要使用*。它选择所有属性 像Select Compcomplisment ..... from（select * from table union select * from table