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 ''U2IEMQQ4A2wEcgooAD9RPQVtVnZRYwolDSJVfgA7BGhTZgB9U3UCbAxyUToBNAdpDn4AIFM5DCVfOQR' at line 1]
insert into demo_cookie(userid,cookies) values(,'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')