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小売価格に基づいて各出版社向けに、最も高価な本と最も高価な本の価値を得るにはどうすればよいですか?SQLで最も少なくて高価な本の価値を得るには?
私は既に下記の表を照会しました。しかし、私はちょうど取得する方法を知らない、私は最後の5行、この1つの結果になると思った。また、もし私が正しい質問を理解したら。
select name, title, retail, sum(quantity)
from books full outer join orderitems using(isbn)
join publisher using(pubid)
group by name, title, retail
order by retail;
NAME TITLE RETAIL SUM(QUANTITY)
----------------------- ------------------------------ ---------- -------------
REED-N-RITE BIG BEAR AND LITTLE DOVE 8.95 4
READING MATERIALS INC. COOKING WITH MUSHROOMS 19.95 8
PRINTING IS US REVENGE OF MICKEY 22 5
AMERICAN PUBLISHING HANDCRANKED COMPUTERS 25 2
READING MATERIALS INC. THE WOK WAY TO COOK 28.75
READING MATERIALS INC. HOW TO GET FASTER PIZZA 29.95
READING MATERIALS INC. BODYBUILD IN 10 MINUTES A DAY 30.95 1
PRINTING IS US HOW TO MANAGE THE MANAGER 31.95 1
REED-N-RITE SHORTEST POEMS 39.95 1
PUBLISH OUR WAY E-BUSINESS THE EASY WAY 54.5 2
AMERICAN PUBLISHING DATABASE IMPLEMENTATION 55.95 7
PUBLISH OUR WAY BUILDING A CAR WITH TOOTHPICKS 59.95
AMERICAN PUBLISHING HOLY GRAIL OF ORACLE 75.95 3
REED-N-RITE PAINLESS CHILD-REARING 89.95 6
分()、MAX()を説明します、再び –