Update laboratory2.sql

km63/Pits_Vadym/laboratory2.sql

@@ -1,2 +1,41 @@
--- LABORATORY WORK 2
--- BY Pits_Vadym
+/*---------------------------------------------------------------------------
+1. Вивести ключ постачальника, що продав менше 2 різних продуктів одному покупцю.
+
+---------------------------------------------------------------------------*/
+--Код відповідь:
+
+ SELECT VENDORS.VEND_ID, 
+ FROM
+
+ SELECT
+ DISTINCT
+ ORDERITEMS.ORDER_NUM,
+ PRODUCTS.PROD_NAME
+ FROM
+ PRODUCTS JOIN ORDERITEMS
+ ON ORDERITEMS.PROD_ID = PRODUCTS.PROD_ID
+
+ SELECT VENDOR_ID.*
+ (SELECT VENDORS.VEND_ID, ORDERS.ORDER_NUM COUNT(ORDERITEMS.PROD_ID)
+ FROM VENDORS JOIN PRODUCTS 
+ ON VENDORS.VEND_ID = PRODUCTS.VEND_ID
+ JOIN ORDERITEMS 
+ ON PRODUCTS.PROD_ID = ORDERITEMS.PROD_ID
+
+ GROUP BY VENDORS.VEND_ID, ORDERITEMS.PROD_ID
+ HAVING COUNT(DISTINCT ORDERITEMS.PROD_ID < 2)VENDORS.VEND_ID
+
+
+/*---------------------------------------------------------------------------
+2.  Вивести ключ покупця, що має не найдешевше замовлення.
+
+---------------------------------------------------------------------------*/
+
+--Код відповідь:
+SELECT CUSTOMERS.CUST_ID
+FROM 
+(SELECT ORDERITEMS.ITEM_PRICE
+FROM CUSTOMERS.CUST_ID JOIN ORDERS.ORDER_NUM
+ON CUSTOMERS.CUST_ID = ORDERS.CUST_ID
+JOIN ORDERITEMS.ITEM_PRICE
+ON ORDERS.ORDER_NUM = ORDERITEMS.ORDER_NUM