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單項選擇題
select au_id from authors where price<$15 or price >$ 20.下面哪一條語句與這一條語句執(zhí)行效果相同（）
A. select au_id from authors where price IN（$15，：$20）；
B. select au_id from authors where price between $15 and $20
C. select au_id from authors where price not between $15 and $20
D. select au_id from authors where price not IN（$15，$20）；
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