Question

我有两张桌子：

表1：[DocNo]，[Numerik]，[[MaTune]

表2：[DocNo]，[RowNo]，[Numerik]，[MaTune]，[DateData]

我想在Table2上创建一个触发器：

每个值都添加到table2中，值[Numerik]和[MaTune]应报告到table1，其中[DocNo]类似

但是如果我添加具有相同doc号的第二个值，我发现了一个错误。考试结束后，我找到了为什么，当我要求更新日期/时间时，会报告每个docuemnt使用相同的DocNo和RowNo。

我怎样才能将值修改为我的触发器。感谢

这是我的代码：

CREATE TRIGGER [dbo].[Tr_MAJ] 
   ON  [dbo].[Table2]
   AFTER INSERT,UPDATE
AS 
BEGIN
    -- SET NOCOUNT ON added to prevent extra result sets from
    -- interfering with SELECT statements.
    SET NOCOUNT ON;

    --Déclaration des variables
    DECLARE @DocNo INT
    DECLARE @RowNo SMALLINT
    DECLARE @Numerik INT
    DECLARE @MaTune DECIMAL(15,2)
    DECLARE @DocNo_TheCat INT



   --Attribution des variables
    SELECT @DocNo = DocNo, @RowNo=RowNo, @Numerik = Numerik, @MaTune = Matune FROM inserted

   --Mise à jour de la date et l'heure dans Table2
    UPDATE Table2 SET Datedata= GETDATE() WHERE RowNo=@RowNo AND DocNo=@DocNo



   IF (SELECT MaTune from Table1 where DocNo=@DocNo) IS NULL
    BEGIN
        UPDATE Table1 SET MaTune = @MaTune, Numerik = @Numerik where DocNo=@DocNo
    END

    IF (SELECT MaTune from Table1 where DocNo=@DocNo) IS NOT NULL
        BEGIN

            --On attribue les nouvelles variables
            SELECT @DocNo_TheCat = DocNo, @RowNo=RowNo, @Numerik = Numerik, @MaTune = Matune FROM TheIxTable178 where DocNo=@DocNo  and RowNo=@RowNo and datedata = (select TOP 1 MAX(datedata) from Table2)

            UPDATE Table1 SET MaTune = @MaTune, Numerik = @Numerik where DocNo=@DocNo_TheCat
    END





END

Answer 1

当table2主键（OK）在插入表中时，表示这些记录被修改（插入或更新），所以尝试使用以下代码：

..... WHERE table2PK in (Select table2PK from inserted)

你需要使用集合操作，

UPDATE t1 SET MaTune = mat
FROM inserted i 
JOIN table2 AS t2 ON i.docNO = t2.docno -- or whatever join conditions you assume that is OK!
JOIN table1 AS t1 ON t1.docNo = i.docno

SQl触发器，插入限制值

1 个答案: