Question

我正在尝试创建一个触发器，在删除实际记录之前删除所有外键。

问题在于，当我删除记录时，它会在SQL Server Management Studio中消失，但当我刷新页面时，我又找到了它。谁知道问题出在哪里？

 create Trigger deleteAffaire on AFFAIRE INSTEAD OF DELETE As 
 begin
    Declare @deletedAffaireId int
    Declare @deletedPlanId int

    set @deletedPlanId = 0;

    select @deletedAffaireId = id_affaire from deleted;

    begin
       select @deletedPlanId = ID_ASSURENCE 
       from ASSURANCE_QUALITE 
       where ASSURANCE_QUALITE.ID_AFFAIRE = @deletedAffaireId;

       delete from ASSURANCE_CONTACT_FONCTION 
       where ASSURANCE_CONTACT_FONCTION.ID_ASSURANCE = @deletedPlanId;

       delete from JALON 
       where JALON.ID_JALON in (select ID_JALON from ASSURANCE_JALON_TYPE 
                                where ASSURANCE_JALON_TYPE.ID_ASSURENCE = @deletedPlanId);

       delete from ASSURANCE_JALON_TYPE 
       where ASSURANCE_JALON_TYPE.ID_ASSURENCE = @deletedPlanId;

       delete from DOCUMENT 
       where DOCUMENT.ID_DOCUMENT in (select ID_DOCUMENT from ASSURENCE_DOCUMENT_TYPE 
                                      where ASSURENCE_DOCUMENT_TYPE.ID_ASSURENCE = @deletedPlanId);

       delete from ASSURENCE_DOCUMENT_TYPE 
       where ASSURENCE_DOCUMENT_TYPE.ID_ASSURENCE = @deletedPlanId;

       delete from ASSURANCE_QUALITE 
       where ASSURANCE_QUALITE.ID_ASSURENCE = @deletedPlanId;
    end
 end

Answer 1

您正在INSTEAD OF DELETE表上执行AFFAIRE触发器，但在触发器主体中，您实际上无法从AFFAIRE中删除任何内容。

INSTEAD OF触发器不是'之前'触发器。顾名思义，是一个而不是触发器。如果你没有真正删除触发器中的行，那么......它们不会被删除。

您确定使用更常规的方法无法达到您想要的效果，例如在外键上级联删除吗？

Answer 2

删除最后在触发器中尝试删除的记录。由于它是a而不是触发器，除非你在触发器中明确地执行它，否则它实际上不会被删除。

SQL Server中的删除前触发器

2 个答案: