A Database Error Occurred

Error Number: 1064

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 'AND study_material.session_id = AND study_material.class_id = AND study_material' at line 6

SELECT * FROM time_table LEFT JOIN students ON students.session_id = time_table.session_id LEFT JOIN time_table_schedule ON time_table_schedule.time_table_id = time_table.time_table_id LEFT JOIN courses ON courses.sub_id = time_table_schedule.sub_id LEFT JOIN study_material ON study_material.sub_id = time_table_schedule.sub_id WHERE study_material.study_material_id =8094 AND study_material.batch_id = AND study_material.session_id = AND study_material.class_id = AND study_material.class_section_id = AND students.student_id= GROUP by courses.course_name

Filename: models/Smsmodal.php

Line Number: 79