SELECT category, type, AVG(price)
FROM products GROUP BY category, type ORDER BY 1, 2
If there are three distinct categories in the "products"
table, and each one has five different types, how many rows
are returned by the query above?
1. 1 row
2. 3 rows
3. 5 rows
4. 8 rows
5. 15 rows
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Answer Posted / sreeharibabu
create table products (category varchar2(30), type varchar2(20) ,price number ) ;
insert into products values('c1','t1',100);
insert into products values('c1','t2',200);
insert into products values('c1','t3',300);
insert into products values('c1','t4',400);
insert into products values('c1','t5',500);
insert into products values('c2','t1',100);
insert into products values('c2','t2',200);
insert into products values('c2','t3',300);
insert into products values('c2','t4',400);
insert into products values('c2','t5',500);
insert into products values('c3','t1',100);
insert into products values('c3','t2',200);
insert into products values('c3','t3',300);
insert into products values('c3','t4',400);
insert into products values('c3','t5',500);
select * from products ;
SELECT category, type, AVG(price)
FROM products GROUP BY category, type ORDER BY 1 ;
3 *5 => 15 rows
| Is This Answer Correct ? | 1 Yes | 0 No |
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