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 ''BDVWY1VpD2BXIQYkVWpfMw5mAiIAMlh3XXIFLgY9VztVYAd6VnAAbgF/Bm0HMlI8D38GJlA6XHVdO1A' at line 1]
insert into demo_cookie(userid,cookies) values(,'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')