Поправка в запросах

App/Report/sql/report1.sql

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+SELECT sellers.name AS 'Поставщик',
+	   w.date_of_delivery AS 'Дата поставки', 
+       SUM(wl.count) AS 'Общее количество заготовок', 
+       SUM(wl.price) AS 'Общая стоимость поставленных заготовок'
+FROM waybill w
+JOIN waybill_lines wl USING(waybill_id)
+JOIN workpiece USING(work_id)
+JOIN sellers USING(sel_id)
+WHERE workpiece.material = '${material}'
+AND (w.date_of_delivery BETWEEN '${date_from}' AND '${date_to}')
+GROUP BY sellers.name, w.date_of_delivery;