Fatal error: Uncaught mysqli_sql_exception: 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 '-20, 20' at line 1 in /srv/disk2/4291600/www/civematerials.universityexaminations.site/coursewise.php:42
Stack trace:
#0 /srv/disk2/4291600/www/civematerials.universityexaminations.site/coursewise.php(42): mysqli_query(Object(mysqli), 'SELECT * FROM p...')
#1 {main}
thrown in /srv/disk2/4291600/www/civematerials.universityexaminations.site/coursewise.php on line 42