跪求sql,该如何处理

create table 表A(年 int, 数量 int)insert into 表Aselect 2012, 132 union allselect 2011, 332 union allselect 1985, 222 union allselect 1984, 332;-- 建触发器create trigger tr_表A on 表A for update,delete,insertasbegin if exists(select 1 from inserted where 年<2011)    or exists(select 1 from deleted where 年<2011) begin   rollback transaction;   raiserror(N'禁止update,insert,delete 2011年前的数量.',10,1); end  end--> 测试update,insert,delete 2011年前的数量update 表A set 数量=611 where 年=1985/*禁止update,insert,delete 2011年前的数量.Msg 3609, Level 16, State 1, Line 1The transaction ended in the trigger. The batch has been aborted.*/insert into 表A select 1981,132/*禁止update,insert,delete 2011年前的数量.Msg 3609, Level 16, State 1, Line 1The transaction ended in the trigger. The batch has been aborted.*/delete from 表A where 年=1984/*禁止update,insert,delete 2011年前的数量.Msg 3609, Level 16, State 1, Line 1The transaction ended in the trigger. The batch has been aborted.*/--> 表数据未变更select * from 表A/*年           数量----------- -----------2012        1322011        3321985        2221984        332(4 row(s) affected)*/