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Example 18SELECT count(*)FROM PartWHERE Class="HW";
Example 19
SELECT count(*), Sum(Balance)FROM Customer;
Example 20
SELECT count(*) AS CustomerCount, Sum(Balance) AS BalanceTotal
FROM Customer;
Example 21SELECT OrderNumFROM OrderLineWHERE PartNum IN
(SELECT PartNum FROM PartWHERE Warehouse='3');
Example 22SELECT RepNum,
Count(*) AS NumOfCustomer, Avg(Balance) AS AvgBalance
FROM CustomerGROUP BY RepNum
Example 23
SELECT RepNum, count(*) AS NumCustomer, Avg(Balance) AS AverageBalance
FROM CustomerGROUP BY RepNumHAVING Count(*)<4;
Example 23-1
SELECT RepNum, count(*) AS NumCustomer, Avg(Balance) AS AverageBalance
FROM CustomerWHERE CreditLimit<10000GROUP BY RepNumHAVING Count(*)<3;
Example 24
SELECT CustomerNum, CustomerName, Rep.RepNum, LastName, FirstName
FROM Customer, RepWHERE Rep.RepNum=Customer.RepNum;
Example 25
SELECT CustomerNum, CustomerName, Rep.RepNum, LastName, FirstName
FROM Customer, RepWHERE Rep.RepNum=Customer.RepNumAND CreditLimit=10000;
Example 26
SELECT Orders.OrderNum, Orderdate, Customer.CustomerNum, CustomerName, Part.PartNum, Description, NumOrdered, QuotedPrice
FROM Orders, Customer, OrderLine, PartWHERE
Customer.CustomerNum=Orders.CustomerNum AND Orders.OrderNum=OrderLine.OrderNum AND OrderLine.PartNum=Part.PartNum;
Example 27
SELECT CustomerNum, CustomerNameFROM CustomerWHERE RepNum='35'
UNION SELECT Customer.CustomerNum, CustomerNameFROM Customer, OrdersWHERE Customer.CustomerNum=Orders.CustomerNum;
Example 28
UPDATE Customer SET Street = '1445 Rivard'WHERE CustomerNum='524';
Example 29
INSERT INTO RepVALUES ('16', 'Rands', 'Shron', '826
Raymond', 'Altonville', 'FL', '32543', 0, 0.05);
Example 30
DELETE *FROM OrderLineWHERE PartNum='BV06';
Example 31
SELECT * INTO SmallCust
FROM Customer
WHERE CreditLimit<=7500;
Example 32
INSERT INTO Employee
VALUES ('987654321', 'Choi', 'Yong', '9001 Stockdale', 'Bakersfield', 'CA', '123456789');