Question

我有以下查询我正在尝试显示消息'此RAO没有子资源'，当没有'tblOrganisation.Name'时，请查看下面的查询，它工作正常，但没有显示我的消息没有organisation.name返回

DECLARE @RAOID INT, @ORGID INT

SET @ORGID = 28
SET @RAOID = (SELECT RAOID FROM tblOrganisation WHERE ORGID = @ORGID)

PRINT @RAOID

IF @RAOID IS NOT NULL
BEGIN
  SELECT 
    CASE 
      WHEN tblOrganisation.ORGID IS NOT NULL THEN tblOrganisation.ORGID 
      ELSE 'No ORGID' 
    END AS ORGID,
    CASE 
      WHEN tblOrganisation.Name IS NOT NULL THEN tblOrganisation.Name 
      ELSE 'No SubSource for this RAO' 
    END as SUBSOURCENAME
  FROM tblOrganisation 
  LEFT OUTER JOIN tblSubGroup ON tblOrganisation.SubGroupID = tblSubGroup.SubGroupID
  WHERE
    tblSubGroup.RAOID = @RAOID
END

感谢。

最诚挚的问候， MS

Answer 1

...
FROM tblOrganisation 
LEFT OUTER JOIN
tblSubGroup ON tblOrganisation.SubGroupID = tblSubGroup.SubGroupID
--Need to change WHERE clause
    AND
    tblSubGroup.RAOID = @RAOID
...

原始的WHERE子句将OUTER JOIN更改为INNER JOIN，因此您需要在那里进行过滤。

另外，其他一些观点：

为什么要加入tblSubGroup？它不用于输出。除非您使用CASE
tblOrganisation.Name是null还是空字符串？

ISNULL（NULLIF（tblOrganisation.Name，''），'此RAO没有子资源'）AS ORGID

试试这个，这可能更符合你想要的......

DECLARE @RAOID INT, @ORGID INT

SET @ORGID = 28
SET @RAOID = (SELECT RAOID FROM tblOrganisation WHERE ORGID = @ORGID)
PRINT @RAOID

IF @RAOID IS NOT NULL
BEGIN
    SELECT 
        ISNULL(tblSubGroup.ORGID), 'No ORGID') AS ORGID,
        ISNULL(NULLIF(tblSubGroup.Name, ''), 'No SubSource for this RAO') AS SUBSOURCENAME
    FROM
        tblOrganisation 
        LEFT OUTER JOIN
        tblSubGroup ON tblOrganisation.SubGroupID = tblSubGroup.SubGroupID
                AND
                tblSubGroup.RAOID = @RAOID
END

然而，我仍然不确定你想要什么...

Answer 2

DECLARE @RAOID INT, @ORGID INT

SET @ORGID = 28
SET @RAOID = (SELECT RAOID FROM tblOrganisation WHERE ORGID = @ORGID)

PRINT @RAOID

IF @RAOID IS NOT NULL
BEGIN
  SELECT 
    CASE 
      WHEN tblOrganisation.ORGID IS NOT NULL THEN tblOrganisation.ORGID 
      ELSE 'No ORGID' 
    END AS ORGID,
    **CASE isnull(tblOrganisation.Name,'')
      WHEN '' THEN 'No SubSource for this RAO'
      ELSE  tblOrganisation.Name**
    END as SUBSOURCENAME
  FROM tblOrganisation 
  LEFT OUTER JOIN tblSubGroup ON tblOrganisation.SubGroupID = tblSubGroup.SubGroupID
  WHERE
    tblSubGroup.RAOID = @RAOID
END

这样做可能对你有用。

Sql ELSE案例不起作用

2 个答案: