查 询 比 计 算 机 类 图 书 贵 的 书 , 语 句 中 SELECT name ,price from book where[br][/br]price________[br][/br] (select price from book where category='计算机')缺省的部分应是( ).
A: all
B: any
C:
D:
A: all
B: any
C:
D:
举一反三
- 查询不比计算机类图书便宜的书,语句中SELECT name ,price from book where price____(select price from book where category='计算机')缺省的部分应是()。 A: > all B: > any C:
- 查询比计算机类图书便宜的书,语句中 SELECT name ,price from book where price____ (select price from book where category='计算机')缺省的部分应是()。 A: > all B: > any C: < any D: < all
- 查询book表中price字段的最大值,查询语句是: A: select max(price) from book; B: select min(price) from book; C: select price from min book; D: select price from max book;
- 查询被借阅过的图书,语句 SELECT name from book where( ) 的条件,下列哪[br][/br]一个不能实现. A: no =all (select bno from borrow) B: no =any (select bno from borrow) C: no in (select bno from borrow) D: exists (select * from borrow where bno=book.bno)
- 【单选题】显示图书信息表中不同书架图书的平均价格大于50元的书架号和平均价格。能得到正确结果的SELECT语句是 A: select casename,AVG(price) <br> from bookinfo group by casename where AVG(price)>50 B: select casename,AVG(price)>50 from bookinfo group by casename C: select casename,AVG(price) <br> from bookinfo<br> having AVG(price)>50 group by casename D: select casename,AVG(price) <br> from bookinfo group by casename<br> having AVG(price)>50