单项选择题

从authors 数据库中查询出所有au_id满足前2个字符为”72”，第四个字符为”-“的作家的姓名，下面哪一条语句满足条件（）

A.select * from authors where au_id =”72_-%”
B.select au_id=72_-% from authors
C.select * from authors where au_id like “72*-%”
D.select * from authors where au_id like “72_-%” _代表任意一个字符

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单项选择题

下面哪一条语句实现了下列功能：在authors数据库中查找所有姓名以d 打头的作家（）

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

单项选择题

select au_id from authors where price<$15 or price >$ 20.下面哪一条语句与这一条语句执行效果相同（）

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）；

单项选择题

select au_id from authors where state=”ca” or state=”ks”.下面哪一条语句与这一条语句执行效果相同（）

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”）；