I'm stuck on this problem
What am I doing wrong? I need it to show all the book types with their average prices.
For each type of book, list the book type and the average price. Only include paperback books.
mysql> SELECT TYPE, AVG(PRICE)
-> FROM BOOK
-> WHERE PAPERBACK = 'Y';
+------+------------+
| TYPE | AVG(PRICE) |
+------+------------+
| SFI | 10.664348 |
+------+------------+
1 row in set (0.00 sec)