$query .= " AND ID IN ({$included_coupons})";
return $wpdb->get_results( $query ); // phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared
* Initialize query objects.
protected function initialize_queries() {
$this->clear_all_clauses();
$this->subquery = new SqlQuery( $this->context . '_subquery' );
$this->subquery->add_sql_clause( 'from', self::get_db_table_name() );
$this->subquery->add_sql_clause( 'group_by', 'coupon_id' );