CREATE TABLE if not exists db_user.temp_numbers (unumber INT); ${sql} select table_name from `INFORMATION_SCHEMA`.`TABLES` where table_name = 'temp_numbers' and TABLE_SCHEMA = 'db_user' select usnid from db_user.tb_user_inf where uname=#{uname} limit 1 select count(*) from db_user.tb_user_inf where uid>100 select uid,uname,udownload_role from db_user.tb_user_inf where uid>100 SELECT min(unumber) FROM db_user.temp_numbers t WHERE t.unumber NOT IN (SELECT uid FROM db_user.tb_user_inf); SELECT max(uid) FROM db_user.tb_user_inf where uid>1000