汗MAX...看到蓝Yao丸先想到的不是黑客...
ME TOO
那神奇的蓝色小Yao丸 我第一想到暗黑啊
第二才是蓝色小Yao丸
看来我还有救? http://www.sqlzoo.cn/3a.htm
牛人别走,这里面第3A个问题困扰我半天了!!! 3a answer:
select song,count(song)
from track
group by song
having count(song) > 2
3b answer:
SELECT title, price, COUNT(*) AS numberoftracks FROM track,album WHERE track.album = album.asin GROUP BY title HAVING album.price/numberoftracks < 0.50
I'm doing 3c... LS常用= = 什么东西?
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