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

		return ( count( $order_items ) === $num_updated );
	}

	/**
	 * Clean products 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 product's reports are removed from database.
		 *
		 * @param int $product_id Product ID.
		 * @param int $order_id   Order ID.
		 */
		do_action( 'woocommerce_analytics_delete_product', 0, $order_id );

		ReportsCache::invalidate();
	}

	/**
	 * Initialize query objects.
	 */
	protected function initialize_queries() {
		$this->clear_all_clauses();
		$this->subquery = new SqlQuery( $this->context . '_subquery' );
		$this->subquery->add_sql_clause( 'select', 'product_id' );
		$this->subquery->add_sql_clause( 'from', self::get_db_table_name() );
		$this->subquery->add_sql_clause( 'group_by', 'product_id' );
	}
}