=> array(),
				'total'   => 0,
				'pages'   => 0,
				'page_no' => 0,
			);

			$selections       = $this->selected_columns( $query_args );
			$included_coupons = $this->get_included_coupons_array( $query_args );
			$limit_params     = $this->get_limit_params( $query_args );
			$this->subquery->add_sql_clause( 'select', $selections );
			$this->add_sql_query_params( $query_args );

			if ( count( $included_coupons ) > 0 ) {
				$total_results = count( $included_coupons );
				$total_pages   = (int) ceil( $total_results / $limit_params['per_page'] );

				$fields    = $this->get_fields( $query_args );
				$ids_table = $this->get_ids_table( $included_coupons, 'coupon_id' );

				$this->add_sql_clause( 'select', $this->format_join_selections( $fields, array( 'coupon_id' ) ) );
				$this->add_sql_clause( 'from', '(' );
				$this->add_sql_clause( 'from', $this->subquery->get_query_statement() );
				$this->add_sql_clause( 'from', ") AS {$table_name}" );
				$this->add_sql_clause(
					'right_join',
					"RIGHT JOIN ( {$ids_table} ) AS default_results
					ON default_results.coupon_id = {$table_name}.coupon_id"
				);

				$coupons_query = $this->get_query_statement();
			} else {
				$this->subquery->add_sql_clause( 'order_by', $this->get_sql_clause( 'order_by' ) );
				$this->subquery->add_sql_clause( 'limit', $this->get_sql_clause( 'limit' ) );
				$coupons_query = $this->subquery->get_query_statement();

				$this->subquery->clear_sql_clause( array( 'select', 'order_by', 'limit' ) );
				$this->subquery->add_sql_clause( 'select', 'coupon_id' );
				$coupon_subquery = "SELECT COUNT(*) FROM (
					{$this->subquery->get_query_statement()}
				) AS tt";

				$db_records_count = (int) $wpdb->get_var(
					$coupon_subquery // phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared
				);

				$total_results = $db_records_count;
				$total_pages   = (int) ceil( $db_records_count / $limit_params['per_page'] );
				if ( $query_args['page'] < 1 || $query_args['page'] > $total_pages ) {
					return $data;
				}
			}

			$coupon_data = $wpdb->get_results(
				$coupons_query, // phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared
				ARRAY_A
			);
			if ( null === $coupon_data ) {
				return $data;
			}

			$this->include_extended_info( $coupon_data, $query_args );

			$coupon_data = array_map( array( $this, 'cast_numbers' ), $coupon_data );
			$data        = (object) array(
				'data'    => $coupon_data,
				'total'   => $total_results,
				'pages'   => $total_pages,
				'page_no' => (int) $query_args['page'],
			);

			$this->set_cached_data( $cache_key, $data );
		}

		return $data;
	}

	/**
	 * Get coupon ID for an order.
	 *
	 * Tries to get the ID from order item meta, then falls back to a query of published coupons.
	 *
	 * @param \WC_Order_Item_Coupon $coupon_item The coupon order item object.
	 * @return int Coupon ID on success, 0 on failure.
	 */
	public static function get_coupon_id( \WC_Order_Item_Coupon $coupon_item ) {
		// First attempt to get coupon ID from order item data.
		$coupon_data = $coupon_item->get_meta( 'coupon_data', true );

		// Normal checkout orders should have this data.
		// See: https://github.com/woocommerce/woocommerce/blob/3dc7df7af9f7ca0c0aa34ede74493e856f276abe/includes/abstracts/abstract-wc-order.php#L1206.
		if ( isset( $coupon_data['id'] ) ) {
			return $coupon_data['id'];
		}

		// Try to get the coupon ID using the code.
		return wc_get_coupon_id_by_code( $coupon_item->get_code() );
	}

	/**
	 * Create or update an an entry in the wc_order_coupon_lookup table for an order.
	 *
	 * @since 3.5.0
	 * @param int $order_id Order ID.
	 * @return int|bool Returns -1 if order won't be processed, or a boolean indicating processing success.
	 */
	public static function sync_order_coupons( $order_id ) {
		global $wpdb;

		$order = wc_get_order( $order_id );

		if ( ! $order ) {
			return -1;
		}

		// Refunds don't affect coupon stats so return successfully if one is called here.
		if ( 'shop_order_refund' === $order->get_type() ) {
			return true;
		}

		$table_name     = self::get_db_table_name();
		$existing_items = $wpdb->get_col(
			$wpdb->prepare(
				// phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
				"SELECT coupon_id FROM {$table_name} WHERE order_id = %d",
				$order_id
			)
		);
		$existing_items     = array_flip( $existing_items );
		$coupon_items       = $order->get_items( 'coupon' );
		$coupon_items_count = count( $coupon_items );
		$num_updated        = 0;
		$num_deleted        = 0;

		foreach ( $coupon_items as $coupon_item ) {
			$coupon_id = self::get_coupon_id( $coupon_item );
			unset( $existing_items[ $coupon_id ] );

			if ( ! $coupon_id ) {
				// Insert a unique, but obviously invalid ID for this deleted coupon.
				$num_deleted++;
				$coupon_id = -1 * $num_deleted;
			}

			$result = $wpdb->replace(
				self::get_db_table_name(),
				array(
					'order_id'        => $order_id,
					'coupon_id'       => $coupon_id,
					'discount_amount' => $coupon_item->get_discount(),
					'date_created'    => $order->get_date_created( 'edit' )->date( TimeInterval::$sql_datetime_format ),
				),
				array(
					'%d',
					'%d',
					'%f',
					'%s',
				)
			);

			/**
			 * Fires when coupon's reports are updated.
			 *
			 * @param int $coupon_id Coupon ID.
			 * @param int $order_id  Order ID.
			 */
			do_action( 'woocommerce_analytics_update_coupon', $coupon_id, $order_id );

			// Sum the rows affected. Using REPLACE can affect 2 rows if the row already exists.
			$num_updated += 2 === intval( $result ) ? 1 : intval( $result );
		}

		if ( ! empty( $existing_items ) ) {
			$existing_items = array_flip( $existing_items );
			$format         = array_fill( 0, count( $existing_items ), '%d' );
			$format         = implode( ',', $format );
			array_unshift( $existing_items, $order_id );
			$wpdb->query(
				$wpdb->prepare(
					// phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared
					"DELETE FROM {$table_name} WHERE order_id = %d AND coupon_id in ({$format})",
					$existing_items
				)
			);
		}

		return ( $coupon_items_count === $num_updated );
	}

	/**
	 * Clean coupons data when an order is deleted.
	 *
	 * @param int $order_id Order ID.
	 */
	public static function sync_on_order_delete( $order_id ) {
		global $wpdb;

		$wpdb->delete( self::get_db_table_name(), array( 'order_id' => $order_id ) );
		/**
		 * Fires when coupon's reports are removed from database.
		 *
		 * @param int $coupon_id Coupon ID.
		 * @param int $order_id  Order ID.
		 */
		do_action( 'woocommerce_analytics_delete_coupon', 0, $order_id );

		ReportsCache::invalidate();
	}

	/**
	 * Gets coupons based on the provided arguments.
	 *
	 * @todo Upon core merge, including this in core's `class-wc-coupon-data-store-cpt.php` might make more sense.
	 * @param array $args Array of args to filter the query by. Supports `include`.
	 * @return array Array of results.
	 */
	public function get_coupons( $args ) {
		global $wpdb;
		$query = "SELECT ID, post_title FROM {$wpdb->posts} WHERE post_type='shop_coupon'";

		$included_coupons = $this->get_included_coupons( $args, 'include' );
		if ( ! empty( $included_coupons ) ) {
			$query .= " AND ID IN ({$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' );
	}
}