觸發器方式：
create trigger trg_A
on A
for update,delete
as
begin
if exists(select 1 from inserted)
update B set Name=(select Name from inserted) where Name=(select Name from deleted)
else
delete B where Name=(select Name from deleted)
end
go


要使用級聯性更新和刪除，使用者可以在Alter TABLE 語句的CONSTRAINT子句中使用ON Update CASCADE 和/或 ON Delete CASCADE 關鍵字。注意他們都必須是應用於外來鍵的。



級聯更新和級聯刪除方式：
Alter TABLE [dbo].[T_USERGROUP] ADD
CONSTRAINT [FK_T_USERGROUP_T_ACCTTEMPLATE] FOREIGN KEY
(
[ATNAME]
) REFERENCES [dbo].[T_ACCTTEMPLATE] (
[ATNAME]
) ON Update CASCADE ON Delete CASCADE