INSERT INTO `book_members` (`no`, `userid`, `password`, `username`, `birthyear`, `age`, `email`, `phone`, `photo`) VALUES (NULL, 'info', md5('info'), '컴퓨터정보', '1994', '25', 'info@ansan.ac.kr', '+82314006971', NULL);
Fatal error: Uncaught mysqli_sql_exception: Duplicate entry 'info' for key 'userid' in /users/2019/i1919027/public_html/2022/WebDB/mysql_test.php:8 Stack trace: #0 /users/2019/i1919027/public_html/2022/WebDB/mysql_test.php(8): mysqli_query() #1 {main} thrown in /users/2019/i1919027/public_html/2022/WebDB/mysql_test.php on line 8