SQL109 纠错4（组合查询，order by..）

SELECT cust_name, cust_contact, cust_email 
FROM Customers 
WHERE cust_state = 'MI'  
UNION 
SELECT cust_name, cust_contact, cust_email 
FROM Customers 
WHERE cust_state = 'IL'
ORDER BY cust_name;

order by子句，必须位于最后一条select语句之后