sql server 中实现级联删除和级联更新

 1. 触发器方法

    create   Trigger  Trigger_Name

    on  Table1

   after  delete , UPDATE

    as

    begin

     set  nocount  on ;

      if   exists ( select   *   from  inserted)

        update  Table2  set  field1  =  ( select  field1  from  inserted)  where  field1  =  ( select  field1  from  inserted)

     else

        delete   from  Table2  where  field1  =  ( select  field1  from  deleted)

     set  nocount  off ;

    end  

2. 创建外键关联关系

 

ALTER   TABLE  table1  ADD
         CONSTRAINT   [ FK_Table1_Table2 ]
FOREIGN   KEY
(
  field1
)  REFERENCES  table2 (
         field1
        )  ON   UPDATE   CASCADE   ON   DELETE   CASCADE