A．GROUP BY mnoB．GROUP BY inoC．GROUP BY priceD．GROUP BY MAX（price)

A.GROUP BY价格DESC

B.ORDERBY价格DESC

C.GROUP BY价格DESC

D.ORDERBY价格DESC

在SQL语句中，下列能实现投影操作的是——。

A．GROUP BY

B．SELECT

C．FROM

D．WHERE

A.GROUP和LLTO

B.DIR和COID

C.GRUB和LILO

A．group

B．cellpadding

C．cellspacing

D．colgroup

A.group

B.family

C.match

D.team

A.Group

B.User

C.Public Folder

D.Contact

以下短语中，与排序无关的是

A．GROUP BY

B．ORDER BY

C．ASC

D．DESC

Linux安装程序提供了两个引导装载程序()

A.GROUP和LLTO

B.DIR和COID

C.GRUB和LILO

D.以上都不是

A．group rate

B．discount rate

C．rack rate

D．high season rate

E．complimentary

在SQL语言的SELECT语句中，用于对结果元组进行排序的是哪一个子句？______。

A．GROUP BY

B．HAVING

C．ORDER BY

D．WHERE