You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '@ where short_url='codeangler파이썬Python-문자숫자인지-확인하기isal' at line 1 | select * from short_url_@ where short_url='codeangler파이썬Python-문자숫자인지-확인하기isalpha-isdigit-isalnum'