- SELECT * FROM music_group_student_fee_ WHERE payment_status_ = 'PAID_COMPLETED' and date_add(now(), interval #{days} day) >= next_payment_date_
+ SELECT * FROM music_group_student_fee_ WHERE next_payment_date_ IS NOT NULL AND payment_status_ = 'PAID_COMPLETED' and date_add(now(), interval #{days} day) >= next_payment_date_