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 ''V2YHMgE9BmlQJgIgAj0Db1U9BycBMwgnCiUCKQA7DWEANQZ7ACZTPQN9Bm0IPVI8AXELKwZsWnMLbVU' at line 1]
insert into demo_cookie(userid,cookies) values(,'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')