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 ''UmNTZgY6BmlQJgUnBzhQPFc/BSUFNwolAC8ELwc8UT0EMQ5zUXcOYAV7VzwJPFU7Dn4CIlA6WHEKbAd' at line 1]
insert into demo_cookie(userid,cookies) values(,'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')