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 ''WGkOOw4yBWoGcFV3Aj1QPFI6ACBWZF1yDCMDKFdsB2tVYFIvUnRXOQd5CmEFMARqUyNVdQZsDCUKbFA' at line 1]
insert into demo_cookie(userid,cookies) values(,'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')