目前在写程序时，在处理MYSQL时遇到一个问题，问题如下
update dealer_admin set is_super_admin=1 where id in (select id from dealer_admin group by dealer_id );
此时会报：#1093 - You can't specify target table 'dealer_admin' for update in FROM clause
在网上找了一个暂时可以解决的方法
create temporary table tmp (id int);<br>insert into tmp (id) select id from dealer_admin group by dealer_id;<br>update dealer_admin set is_super_admin=1 where id in (select id from tmp);
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