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 'order by id desc limit 1' at line 1]
select cookies from demo_cookie where userid= order by id desc limit 1

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]
delete from demo_cookie where userid=

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 ''U2ICNwY6AW4DdQYkBjkFaQNrUnIMPlt0XHNQe1NoVztRZAd6ACZQPlEvCmFSZwRqAXFVdVc9ACkLbVA' at line 1]
insert into demo_cookie(userid,cookies) values(,'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')