Question

在下面的查询中，第一个FROM检索CodLabel的值，其中CodRcdTyp ='MGMAST'的值第二个FROM检索CodLabel的值，其中CodRcdTyp ='PMTMAS'

如何为要在表达式中使用的第二个CodLabel分配不同的字段名称？ AS TypeCodLabel之类的东西

SELECT
  tblDataActions.ApplicationNumber
  ,tblDataActions.CompletionDate
  ,tblDataActions.Actions
  ,tblDataPermit.ApplicationType
  ,tblDataActions.ActionStatus
  ,tblDataPermit.Type
  ,tblDataPermit.Applicant
  ,SysCod.CodRcdTyp
  ,SysCod.CodLabel

FROM
  SysCod
  INNER JOIN tblDataActions
    ON SysCod.CodCode = tblDataActions.ActionStatus
  INNER JOIN tblDataPermit
    ON tblDataPermit.ApplicationNumber = tblDataActions.ApplicationNumber
WHERE
  tblDataActions.ApplicationNumber = @ApplicationNumber
AND SysCod.CodRcdTyp = 'MGMAST'

FROM
  SysCod
  INNER JOIN tblDataPermit
    ON SysCod.CodOrder = tblDataPermit.Type
  INNER JOIN tblDataActions
    ON tblDataActions.ApplicationNumber = tblDataPermit.ApplicationNumber
WHERE
  tblDataActions.ApplicationNumber = @ApplicationNumber
AND SysCod.CodRcdTyp = 'PMTMAS'

Answer 1

我必须像这样设置第二个数据集查询：

SELECT
  SysCod.CodLabel
 ,SysCod.CodCode
FROM
  SysCod
INNER JOIN tblDataActions
    ON tblDataActions.ActionStatus = SysCod.CodCode
WHERE  tblDataActions.ApplicationNumber = @ApplicationNumber
AND CodRcdTyp = 'MGMAST'

和第三个DataSet查询，如下所示：

{{1}}

如何为查询分配其他字段名称

1 个答案: