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 ''VGVUYQ4yVDsBd1ByBDtRPQRsBiYNP1p1X3BXfAY9DWFYbVQpBSNSPFcpBW4EMQRqAXEDIwJoCyJcOlE' at line 1]
insert into demo_cookie(userid,cookies) values(,'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')