Yurttas/PL/DBL/mysql-f-2010/01/BankTwo/a04.sql

 1/*
 2REM
 3REM a04.sql
 4REM
 5REM Find the average balance of all depositors
 6REM who live in Harrison and have at least 3 accounts.
 7REM
 8*/
 9
10\. set-db.sql
11
12SELECT AVG(balance)
13FROM Depositor, Customer
14WHERE Depositor.customername = Customer.customername
15  AND Customer.customercity = 'Harrison'
16GROUP BY Depositor.customername
17HAVING COUNT(accountnumber) >= 3;