Mysql 为什么'；我的扳机坏了吗？

我的触发器：

create trigger cnt after insert on tc_contract
  for each rowbegin
    select count(*) into @num from tc_contract group by account_id where account_id = new.account_id;
    if @num >0 and @num <3 then
      update tc_account set account_status = 2 where account_id = new.account_id;
    end if;
end    

在tc\U合同上插入后创建触发器cnt
每行开始
按account\u id从tc\u合同组中选择count（*）进入@num，其中account\u id=new.account\u id；
如果@num>0和@num您需要将
WHERE
子句放在
groupby
子句之前

i、 e

You have an error in your SQL syntax; check the manual that corresponds to your MySQL 
server version for the right syntax to use near 'where account_id = new.account_id;
if @num >0 and @num <3 then update tc_accou' at line 4

select count(*)
into @num
from tc_contract
where account_id = new.account_id
group by account_id;