Question

我们有一个发货表，其中包含orderID（oid）和发票编号（ino）以及sequnce编号列。我正在尝试编写一个触发器，将sequnce数设置为零，或者如果存在一组唯一的oid，ino，seq，则将其递增。我不确定如何引用插入记录的OID和INO列？

这是我到目前为止所得到的：

CREATE TRIGGER SHPVIAb_insert ON [acsdcs2].[dbo].[SHPVIAb]
FOR INSERT
AS
DECLARE @newseq tinyint;
SET @newseq = 0;
IF EXISTS (SELECT *
           FROM [acsdcs2].[dbo].[SHPVIAb] s 
           WHERE s.SHVOID_AN = inserted.SHVOID_AN
             AND s.SHVINO_AN = inserted.SHVINO_AN
          )
  BEGIN
    SET @newseq = (SELECT MAX(SHVSEQ_US)
           FROM [acsdcs2].[dbo].[SHPVIAb] s 
           WHERE s.SHVOID_AN = inserted.SHVOID_AN
             AND s.SHVINO_AN = inserted.SHVINO_AN)
    SET @newseq = @newseq + 1
  END

update [acsdcs2].[dbo].[SHPVIAb]
   set SHVSEQ_US=@newseq;

Answer 1

我认为这样的事情更接近你想要的。您想要加入到插入的表中，并处理一次插入多个记录的情况。

CREATE TRIGGER SHPVIAb_insert ON [acsdcs2].[dbo].[SHPVIAb]
    FOR INSERT
AS
BEGIN
    IF EXISTS ( SELECT  1
                FROM    [acsdcs2].[dbo].[SHPVIAb] s
                        INNER JOIN INSERTED i ON s.SHVOID_AN = i.SHVOID_AN
                                                 AND s.SHVINO_AN = i.SHVINO_AN ) 
        BEGIN
            UPDATE  s
            SET     SHVSEQ_US = ( SELECT    MAX(SHVSEQ_US)
                                  FROM      [acsdcs2].[dbo].[SHPVIAb] ss
                                  WHERE     ss.SHVOID_AN = s.SHVOID_AN
                                            AND ss.SHVINO_AN = s.SHVINO_AN
                                ) + 1
            FROM    [acsdcs2].[dbo].[SHPVIAb] s
                    INNER JOIN INSERTED i ON s.SHVOID_AN = i.SHVOID_AN
                                             AND s.SHVINO_AN = i.SHVINO_AN 
        END
END

触发器需要在select中使用插入的记录列

1 个答案: