CREATE TRIGGER [TRIGSENDMT] ON dbo.BOX_MT 
FOR INSERT
AS
begin
declare @Areaid int ,@Sender varchar(20),@mobile varchar (11),@number int
Select @Areaid= areaid,@Sender=Sender,@mobile=mobile  from inserted 
    begin 
   set @number = cast(Right(@mobile,1) as int )
    if @number%2 = 0
    insert into box_mt_0(areaid,objtype,mobile,message,sender,feemobile,servicetype,
     feetype,feevalue,givenvalue,motomtflag,reportflag,msgtype,createtime)
    (select areaid,objtype,mobile,message,sender,feemobile,servicetype,
    feetype,feevalue,givenvalue,motomtflag,reportflag,msgtype,createtime 
     from inserted)
    else
    insert into box_mt_1(areaid,objtype,mobile,message,sender,feemobile,servicetype,
    feetype,feevalue,givenvalue,motomtflag,reportflag,msgtype,createtime)
    (select areaid,objtype,mobile,message,sender,feemobile,servicetype,
    feetype,feevalue,givenvalue,motomtflag,reportflag,msgtype,createtime 
    from inserted)
    end
end谁帮我解释一下?