query no 2 is select avg(CustBal) from Customer where CusState='WA' GROUP BY city. Here aggregate function avg is used to calculate average of customer balance.next where statement is used to filter the customer who live in Washington state and at last group by clause is used to show the balance city wise
query no 2 is select avg(CustBal) from Customer where CusState='WA' GROUP BY city. Here aggregate function avg is used to calculate average of customer balance.next where statement is used to filter the customer who live in Washington state and at last group by clause is used to show the balance city wise
Database Systems: Design, Implementation, & Management
12th Edition
ISBN:9781305627482
Author:Carlos Coronel, Steven Morris
Publisher:Carlos Coronel, Steven Morris
Chapter8: Advanced Sql
Section: Chapter Questions
Problem 3P
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