*/
	protected function prepare_query() {

		global $wpdb;

		$vars = array(
			$this->get_skip(),
			$this->get( 'per_page' ),
		);

		// phpcs:disable WordPress.DB.PreparedSQL.InterpolatedNotPrepared -- SQL is prepared in other functions.
		$sql = $wpdb->prepare(
			"SELECT SQL_CALC_FOUND_ROWS *
			FROM {$wpdb->prefix}lifterlms_notifications AS n
			LEFT JOIN {$wpdb->posts} AS p on p.ID = n.post_id
			{$this->sql_where()}
			{$this->sql_orderby()}
			LIMIT %d, %d
			;",
			$vars
		);
		// phpcs:enable WordPress.DB.PreparedSQL.InterpolatedNotPrepared

		return $sql;