private function sql_having() {

		global $wpdb;

		$sql = "HAVING status IS NOT NULL AND {$this->sql_status_in()}";

		if ( $this->get( 'suppress_filters' ) ) {
			return $sql;
		}

		/**
		 * Filters the query HAVING clause
		 *
		 * @since Unknown
		 *
		 * @param string             $sql           The HAVING clause of the query.
		 * @param LLMS_Student_Query $student_query Instance of LLMS_Student_Query.
		 */
		return apply_filters( 'llms_student_query_having', $sql, $this );
	}