假定student表中有字段grade,grade代表分数,依次统计grade字段的最大值,最小值,平均值的SQL语句是
A. SELECT max(grade),min(grade),average(grade) FROM student;
B. SELECT max(grade),min(grade),avg(grade) FROM student;
C. SELECT min(grade),average(grade),max(grade) FROM student;
D. SELECT min(grade),avg(grade),max(grade) FROM student;
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SQL Server是一个_____数据库系统
A. 网状型
B. 层次型
C. 关系型
D. 模型
SQL Server2000 数据可以安装在___操作系统
A. linux
B. Andriod
C. IOS
D. WINDOWS 2000 Server
要查询book表中包含“计算机”的书籍情况,可以使用_____语句
A. select * from book where name like ‘计算机*’
B. select * from book where book_name like ‘计算机%’
C. select * from book where name= ‘计算机%’
D. select * from book where name like ‘%计算机%’
select语句中与having子句通常同时使用的是_____子句
A. where
B. order by
C. group by
D. update