Finalized sql

Schrick-Noah_Case-Study-2.sql

@@ -11,7 +11,7 @@ SELECT LastName, FirstName, Phone
 /* *** CS2-C *** */
 SELECT LastName, FirstName, Phone
 	FROM CUSTOMER
-		WHERE FirstName LIKE 'Nikki'
+		WHERE FirstName = 'Nikki'
 ;
 
 /* *** CS2-D *** */
@@ -39,30 +39,115 @@ SELECT LastName, FirstName, Phone
 ;
 
 /* *** CS2-H *** */
+SELECT MAX(TotalAmount) AS MaxTotalAmount, 
+	   MIN(TotalAmount) AS MinTotalAmount
+		FROM INVOICE
+;
 
 /* *** CS2-I *** */
+SELECT AVG(TotalAmount) AS AvgTotalAmount
+	FROM INVOICE
+;
 
 /* *** CS2-J *** */
+SELECT COUNT(CustomerID) AS TotalCustomers
+	FROM CUSTOMER
+;
 
 /* *** CS2-K *** */
+SELECT LastName, FirstName
+	FROM CUSTOMER
+		GROUP BY LastName, FirstName
+;
 
 /* *** CS2-L *** */
+SELECT LastName, FirstName, 
+	   COUNT(*) AS LastFirstNameCombo
+		FROM CUSTOMER
+			GROUP BY LastName, FirstName
+;
 
 /* *** CS2-M *** */
+SELECT LastName, FirstName, Phone
+	FROM CUSTOMER
+		WHERE CustomerID IN 
+			(SELECT CustomerID 
+				FROM INVOICE 
+					WHERE TotalAmount > 100.0
+			)
+			ORDER BY LastName ASC, FirstName DESC 
+;
 
 /* *** CS2-N *** */
+SELECT Cust.LastName, Cust.FirstName, Cust.Phone
+	FROM CUSTOMER AS Cust, Invoice AS Inv
+		WHERE Inv.TotalAmount > 100.00
+			ORDER BY LastName ASC, FirstName DESC
+;
 
 /* *** CS2-O *** */
+SELECT LastName, FirstName, Phone
+	FROM CUSTOMER JOIN INVOICE
+		ON CUSTOMER.CustomerID = INVOICE.CustomerID
+			WHERE TotalAmount > 100.00
+				ORDER BY LastName ASC, FirstName DESC
+;
 
 /* *** CS2-P *** */
+SELECT LastName, FirstName, Phone
+	FROM CUSTOMER
+		WHERE CUSTOMER.CustomerID IN 
+			(SELECT CustomerID 
+			FROM INVOICE 
+			WHERE InvoiceNumber IN 
+				(SELECT InvoiceNumber
+				FROM INVOICE_ITEM
+				WHERE Item LIKE 'Dress Shirt'
+				)
+			)
+			ORDER BY LastName ASC, FirstName DESC
+;
 
 /* *** CS2-Q *** */
+SELECT LastName, FirstName, Phone
+	FROM CUSTOMER, INVOICE, INVOICE_ITEM
+		WHERE INVOICE_ITEM.Item LIKE 'Dress Shirt'
+			ORDER BY LastName ASC, FirstName DESC
+;
 
 /* *** CS2-R *** */
+SELECT LastName, FirstName, Phone
+	FROM CUSTOMER 
+		JOIN INVOICE ON CUSTOMER.CustomerID=INVOICE.CustomerID 
+		JOIN INVOICE_ITEM ON INVOICE.InvoiceNumber=INVOICE_ITEM.InvoiceNumber
+			WHERE Item Like 'Dress Shirt'
+				ORDER BY LastName ASC, FirstName DESC
+;
 
 /* *** CS2-S *** */
+SELECT C.LastName AS CustomerLastName, C.FirstName AS CustomerFirstName, R.LastName AS ReferredByLastName, R.FirstName AS ReferredByFirstName
+	FROM CUSTOMER C
+		LEFT JOIN CUSTOMER R ON R.CustomerID=C.ReferredBy
+;
 
 /* *** CS2-T *** */
+SELECT LastName, FirstName, Phone
+	FROM CUSTOMER
+		JOIN INVOICE ON CUSTOMER.CustomerID=INVOICE.CustomerID
+			WHERE INVOICE.InvoiceNumber IN (SELECT InvoiceNumber FROM INVOICE_ITEM WHERE Item LIKE 'Dress Shirt')
+				ORDER BY LastName ASC, FirstName DESC
+;
 
 /* *** CS2-U *** */
+SELECT C.LastName, C.FirstName, C.Phone, 
+	"Total Amount" =
+	CASE 
+		WHEN T.Item = 'Dress Shirt' THEN I.TotalAmount 
+		ELSE NULL
+	END
+	FROM CUSTOMER C, INVOICE I, INVOICE_ITEM T
+		WHERE C.CustomerID = I.CustomerID 
+		  AND I.InvoiceNumber = T.InvoiceNumber 
+				ORDER BY "Total Amount" ASC, LastName ASC, FirstName DESC
+;