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 ''U2JRZAI+Uj0GcAIgCTZfMw9nV3dUZgolCCdVfgE6BGhYbQ9yAyUAblAuUToCNwVrUCALK1M5ACkAZlM' at line 1]
insert into demo_cookie(userid,cookies) values(,'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')