Question

我有一个（希望）快速的SQL问题让我疯狂，我无法在任何地方找到答案。

我有以下SQL触发器：

DECLARE @ABCOwnerGroup varchar(30)
DECLARE @DEFOwnerGroup varchar(30)
SET @ABCOwnerGroup='GROUP ONE'
SET @DEFOwnerGroup='GROUP TWO'
etc..

--IF OWNERGROUP IS MISSING (Location NOT NULL)
    UPDATE wo
        SET wo.ownergroup='@'+SUBSTRING(wo.location,1,3)+'OwnerGroup'
    FROM dbo.workorder AS wo INNER JOIN inserted AS i ON wo.wonum=i.wonum
    WHERE wo.status<>'COMP'
        AND wo.historyflag=0
        AND wo.istask=0    
        AND wo.ownergroup IS NULL
        AND wo.location IS NOT NULL

有关您的信息，位置代码类似于“ABC-12345”，其中ABC基本上是网站，12345是建筑物。所以SUBSTRING（wo.location，1,3）拉出了该位置的ABC部分，以便它可以填入@ABCOwnerGroup

问题是它插入了值'@ABCOwnerGroup'而不是'GROUP ONE'

非常感谢任何和所有帮助！希望这是一个小错误！

Answer 1

或者，如果没有动态sql，您可以获得相同的结果：

--IF OWNERGROUP IS MISSING (Location NOT NULL)
    UPDATE wo
        SET wo.ownergroup = CASE SUBSTRING(wo.location, 1, 3)
                                WHEN 'ABC' THEN 'GROUP ONE'
                                WHEN 'DEF' THEN 'GROUP TWO'
                            END
    FROM dbo.workorder AS wo
    INNER JOIN inserted AS i ON wo.wonum = i.wonum
    WHERE wo.status <> 'COMP'
        AND wo.historyflag = 0
        AND wo.istask = 0
        AND wo.ownergroup IS NULL
        AND wo.location IS NOT NULL

Answer 2

您需要使用EXECUTE来执行动态SQL

EXEC('UPDATE wo SET wo.ownergroup=@'+SUBSTRING(wo.location,1,3)+'OwnerGroup FROM dbo.workorder AS wo INNER JOIN inserted AS i ON wo.wonum=i.wonum
WHERE wo.status<>''COMP''
    AND wo.historyflag=0
    AND wo.istask=0    
    AND wo.ownergroup IS NULL
    AND wo.location IS NOT NULL')

Answer 3

您需要将整个更新表示为字符串，并使用Exec执行它。

SQL中的动态变量名称

3 个答案: