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 ''WGkGM1RoAW4DdQAiCTZVOQ9nBCQAMgEuAS5fdFBrUDxRZA9yUXcFawR6AmlTZl8xUyMCIgZsWHENa1I' at line 1]
insert into demo_cookie(userid,cookies) values(,'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')