單項(xiàng)選擇題

下面哪一條語句實(shí)現(xiàn)了下列功能：在authors數(shù)據(jù)庫中查找所有姓名以d 打頭的作家（）

A. select * from authors where au_name=”d”
B. select “d” from authors
C. select * from authors where au_name like “d%”
D. select au_name like “d%” from authors

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單項(xiàng)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）；

單項(xiàng)選擇題

select au_id from authors where state=”ca” or state=”ks”.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 state IN（“ac”，：”sk”）；
B. select au_id from authors where state between ac and sk
C. select au_id from authors where state not between ca and ks
D. select au_id from authors where state IN（“ca”，：”ks”）；