Реализация первого вида отчета

App/Report/sql/view_report.sql

@@ -1,5 +1,7 @@
-SELECT name_of_product AS 'Наименование',
-       count_of_bought AS 'Количество',
-       sum AS 'Общая стоимость'
-FROM reports
-WHERE month = '$month' AND year = '$year';
+SELECT w.material AS Наименование, 
+    sum(sum) AS Сумма, 
+    sum(reports.count) AS Количество 
+    from reports
+JOIN workpiece w ON reports.item_id = w.work_id
+WHERE report_category_id = '$id' AND (month = '$month' AND year = '$year')
+GROUP BY material;