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 'or channelId in(select id from `demo_menu` where parentId=)' at line 1]
select count(*) as num from `demo_product` WHERE channelId= or channelId in(select id from `demo_menu` where parentId=)

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 'or channelId in(select id from `demo_menu` where parentId=) order by ordering de' at line 1]
SELECT * FROM `demo_product` WHERE channelId= or channelId in(select id from `demo_menu` where parentId=) order by ordering desc,dtTime desc limit 5