A.从authors表中查询出city是beijin，且名为count的记录数目。
B.从authors表中查询出city 是beijin的第一条记录
C.从authors表中查询出city 是beijin 的所有记录
D.从authors表中查询出city是beijin的记录总数目。

A.TRUNCATE TABLE 删除数据后可以恢复，而DELETE 不可以恢复
B.TRUNCATE TABLE 删除数据后不可以恢复，而DELETE 可以恢复
C.两者删除数据过后都可以恢复
D.两者删除数据后都不可以恢复

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

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

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）；

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”）；

A.sp_renamedb authors student
B.sp_rename  authors  student
C.sp_renamedata authors student
D.sp_renameview authors student

A.sp_spaceused authors
B.sp_depends authors
C.sp_help authors
D.sp_renamedb authors student

A.创建表格exa，使其增加一列
B.创建表格exa，使其删除一列
C.修改表格exa 定义，使其增加一列
D.修改表格 exa 定义，使其删除一列

A.256
B.64
C.108
D.128