Question

如果更新正在分配用户，我需要创建一个触发器。我们之前没有设定价值。

我有这个，但服务器不喜欢它....我收到错误

＆＃39;附近的语法不正确。＆＃39;

在＆＃39;设置＆＃39;线。

CREATE TRIGGER dbo.trgIssueAcknowledged 
ON  dbo.hdIssues
AFTER UPDATE
AS 
BEGIN
    -- SET NOCOUNT ON added to prevent extra result sets from
    -- interfering with SELECT statements.
    SET NOCOUNT ON;

    If (select inserted.AssignedToUserID from inserted) IS NULL 
    begin
        return
    end

    If (select inserted.AssignedToUserID from inserted) = 0
    begin
        return
    end

    If (select inserted.AcknowledgeDate from inserted) IS NULL
    begin
      set inserted.AcknowledgeDate = GETDATE ( );
    end
END 
GO

Answer 1

你的触发器存在许多问题，它没有使用你想要更新的真实表，它假设每次只修改一行，而RETURN的逻辑太奇怪。

CREATE TRIGGER dbo.trgIssueAcknowledged 
ON  dbo.hdIssues
AFTER UPDATE
AS 
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;

UPDATE A
SET A.AcknowledgeDate = GETDATE()
FROM dbo.hdIssues A
INNER JOIN INSERTED I
    ON A.TheKeyOfTheTable = I.TheKeyOfTheTable 
WHERE A.AcknowledgeDate IS NULL
AND ( A.AssignedToUserID <> 0 AND A.AssignedToUserID IS NOT NULL)

END

Answer 2

这可能是拼写错误吗？

inserted.AcknoledgeDate

看起来很缺少＆＃34; w＆＃34;

应该是

inserted.AcknowledgeDate

Answer 3

首先插入的是虚拟表，因此如果要更新其中一列，则需要进行更新。

UPDATE inserted
 set AcknowledgeDate = GETDATE ( )
WHERE AcknowledgeDate  IS NULL;

但第二，为什么要在AFTER UPDATE触发器中更新inserted表中的值？你真的想做什么？

Answer 4

试试这个

CREATE TRIGGER dbo.trgIssueAcknowledged ON dbo.hdIssues
        AFTER INSERT, DELETE, UPDATE
    AS
        BEGIN               
            SET NOCOUNT ON;             
            BEGIN TRY

                DECLARE @INSERTCOUNT INT
                DECLARE @DELETECOUNT INT
                SET @INSERTCOUNT = ( SELECT COUNT(*)
                                     FROM   INSERTED
                                   )
                SET @DELETECOUNT = ( SELECT COUNT(*)
                                     FROM   DELETED
                                   )

                IF @INSERTCOUNT > 0
                    AND @DELETECOUNT = 0 
                    BEGIN
                    -- Insert statements for trigger here
                        INSERT  INTO dbo.hdIssues
                             ( col1, col2)

                                SELECT  I.col1,
                                        I.col2                                     
                                FROM    INSERTED I          
                    END
                ELSE 
                    IF @INSERTCOUNT > 0
                        AND @DELETECOUNT > 0 
                        BEGIN
                            INSERT  INTO dbo.hdIssues
                                   ( col1, col2)
                                    SELECT  I.col1,
                                            I.col2 
                                    FROM    INSERTED I
                                            INNER JOIN DELETED D ON I.col1 = D.col1
                                    WHERE   I.col1 <> D.col1
                                            OR 
                                            I.col2 <> D.col2

                        END
            END TRY
            BEGIN CATCH 

            END CATCH
        END
    GO

更新触发器，为插入的数据SQL Server设置值

4 个答案: