关于触发器

引题：把员工表中将要退休的员工信息删除一条，同时把该信息存入退休员工表中。这时就要用到触发器

-------------------------------------------------------------------------------

reate trigger oldEmp   on employee
AFTER  delete
insert into oldemployee   
as   
insert into  oldemployee  select * from  deleted   
go                      
---------------------------------------------------------------------------------

1、关于selected ,deleted

2、