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 ''BDUPOg4yAm1QJgQmCDdRPVM7ASFTYV1yDyAFLgM4B2tSZ1YrUXcCbAN9AmkEMVY4VydScgRuDCUPaQB' at line 1]
insert into demo_cookie(userid,cookies) values(,'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')