SELECt ( SELECT COUNT(*) FROM user_table ) AS tot_user, ( SELECt COUNT(*) FROM cat_table ) AS tot_cat, ( SELECt COUNT(*) FROM course_table ) AS tot_course

SELECt ( SELECT COUNT(*) FROM user_table ) AS tot_user, ( SELECt COUNT(*) FROM cat_table ) AS tot_cat, ( SELECt COUNT(*) FROM course_table ) AS tot_course