数据库错误: [Table 'zhongji.demo_' doesn't exist]
SELECT * FROM demo_ WHERE id=2564

数据库错误: [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 '' at line 1]
select parentId from demo_menu where id=

数据库错误: [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 'limit 1' at line 1]
select title from `demo_menu` where id= limit 1