Example 18 SELECT count(*) FROM Part WHERE Class="HW";

Example 19 SELECT count(*), Sum(Balance) FROM Customer;

Example 20 SELECT count(*) AS CustomerCount, Sum(Balance) AS BalanceTotal FROM Customer;

Example 21 SELECT OrderNum FROM OrderLine WHERE PartNum IN (SELECT PartNum FROM Part WHERE Warehouse='3');

Example 22 SELECT RepNum, Count(*) AS NumOfCustomer, Avg(Balance) AS AvgBalance FROM Customer GROUP BY RepNum

Example 23 SELECT RepNum, count(*) AS NumCustomer, Avg(Balance) AS AverageBalance FROM Customer GROUP BY RepNum HAVING Count(*)<4;

Example 23-1 SELECT RepNum, count(*) AS NumCustomer, Avg(Balance) AS AverageBalance FROM Customer WHERE CreditLimit<10000 GROUP BY RepNum HAVING Count(*)<3;

Example 24 SELECT CustomerNum, CustomerName, Rep.RepNum, LastName, FirstName FROM Customer, Rep WHERE Rep.RepNum=Customer.RepNum;

Example 25 SELECT CustomerNum, CustomerName, Rep.RepNum, LastName, FirstName FROM Customer, Rep WHERE Rep.RepNum=Customer.RepNum AND CreditLimit=10000;

Example 26 SELECT Orders.OrderNum, Orderdate, Customer.CustomerNum, CustomerName, Part.PartNum, Description, NumOrdered, QuotedPrice FROM Orders, Customer, OrderLine, Part WHERE Customer.CustomerNum=Orders.CustomerNum AND Orders.OrderNum=OrderLine.OrderNum AND OrderLine.PartNum=Part.PartNum;

Example 27 SELECT CustomerNum, CustomerName FROM Customer WHERE RepNum='35' UNION SELECT Customer.CustomerNum, CustomerName FROM Customer, Orders WHERE Customer.CustomerNum=Orders.CustomerNum;

Example 28 UPDATE Customer SET Street = '1445 Rivard' WHERE CustomerNum='524';

Example 29 INSERT INTO Rep VALUES ('16', 'Rands', 'Shron', '826 Raymond', 'Altonville', 'FL', '32543', 0, 0.05);

Example 30 DELETE * FROM OrderLine WHERE PartNum='BV06';

Example 31 SELECT * INTO SmallCust FROM Customer WHERE CreditLimit<=7500;

Example 32 INSERT INTO Employee VALUES (' ', 'Choi', 'Yong', '9001 Stockdale', 'Bakersfield', 'CA', ' ');