更新、刪除觸發器使用

ALTER TRIGGER  eDocument_delete
   ON  eDocument
   AFTER  DELETE,UPDATE
AS
BEGIN
    -- SET NOCOUNT ON added to prevent extra result sets from
    -- interfering with SELECT statements.
    SET NOCOUNT ON;

    -- Insert statements for trigger here
    
    --delete attaches documnet
    if (Select Count(*) From inserted) = 0 and (Select Count(*) From deleted) > 0
    begin
        delete e from edocument as e join deleted as d  on e.documentid=d.documentid where e.mainDocumentID=d.documentid
    end
    
    --update attaches documnet
    if (Select Count(*) From inserted) > 0 and (Select Count(*) From deleted) > 0
    begin
        update edocument set flag_delete=i.flag_delete from edocument as e join inserted as i on i.documentid=e.documentid  where e.mainDocumentID=i.documentid
    end
END
GO