Question

版本：SQL Server 2008 R2

此触发器检查主键违规（如果有）将行移动到历史记录表;然后删除该行;然后插入导致违规的行。

但它没有做好自己的工作。

CREATE TRIGGER [dbo].[ONINSERT]
   ON  [dbo].[TICKETS]
   Instead of INSERT
AS 
BEGIN
DECLARE @ID VARCHAR(200)
    SET NOCOUNT ON;
    SET @ID = (SELECT TICKET_ID FROM inserted)

    INSERT TICKET_HISTORY
    SELECT * FROM TICKETS  
    WHERE 
    TICKET_ID = @ID ;
    print 'Inserting ' + @id

    DELETE FROM TICKETS
    WHERE TICKET_ID = @ID; 
    print 'Deleting' + @id

    INSERT TICKETS
    SELECT * FROM inserted; 
    print 'Inserting back' + @id

Answer 1

即使您有多个插入内容，也只会触发一次，所以在您的情况下我不会发现这种情况......您不需要再次删除该行，因为而不是插入通常意味着＆＃ 34;而不是插入执行一些自定义操作＆＃34;

  if exists
    (
    select 1 from inserted i
    join
    mytable t
    on t.id=i.id
    )
    begin
    --insert into tickets history
    insert into ticketshistory
    select i.* from inserted i
    join
    mytable t where t.id=i.id
---you can add custom logic to alert or simply ignore
    return

    end
    --this is needed since if there is no violation you have to insert rows
    insert into tickets
    select * from inserted

触发不保存历史记录

1 个答案: