Mysql limit 子查询

（1）mysql limit 不支持子查询像下面这条语句无法执行
   SELECT  * FROM b_c_s1 where CT_ID IN (SELECT DISTINCT CT_ID FROM b_c_s1 LIMIT 0,2);
（2）应该在只查询外面再加一个查询
   SELECT  * FROM b_c_s1 where CT_ID IN (SELECT a.CT_ID FROM (SELECT DISTINCT CT_ID FROM b_c_s1 LIMIT 0,2) a)