在linux系统中，更改组class的组名为grade，应执行（）命令。A、groupmod -l grade classB、groupmod -n grade classC、chgroup -l grade classD、chgroup -n grade class
在linux系统中，更改组class的组名为grade，应执行（）命令。
- A、groupmod -l grade class
- B、groupmod -n grade class
- C、chgroup -l grade class
- D、chgroup -n grade class
相关考题：
关系SC(Sno，Cno，Grade)表示学号，课程号，成绩。现要查询平均分在90分以上的学生的学号和平均成绩，正确的语句是______。A．SELECT Sno，AVG(Grade) FROM SC WHERE AVG(Grade)＞=90 GROUP BY SnoB．SELECT Sno，AVG(Grade) FROM SC GROUP BY Sno HAVING AVG(Grade)＞=90C．SELECT Sno，AVG(Grade) FROM SC WHERE AVG(Grade)＞=90 ORDER BY SnoD．SELECT Sno，AVG(Grade) FROM SC GROUP BY Cno HAVING AVG(Grade)＞=90
设有关系模式：SC(sno，cno，grade)，各属性含义依次是学号、课程号、分数。将关系SC中所有选修课程号为‘DB’的学生的分数增加10分，正确的SQL命令是A．ALTER TABLE SC SET GRADE+10 WHERE CNO=’DB’B．ALTER TABLE SC SET GRADE=GRADE+10 WHERE CNO=’DB’C．UPDATE SC SET GRADE+10 WHERE CNO=’DB’D．UPDATE SC SET GRADE=GRADE+10 WHERE CNO=’DB’
在关系SC中，查询学习课程号为′DB′，且成绩在60至90之间的学生学号的正确的 SQL命令是A．SELECT SNO FROM SC WHERE CNO=′DB′AND GRADE DETWEEN 60 AND 90B．SELECT SNO FROM SC WHERE CNO=′DB′OR GRADE BETWEEN 60 AND 90C．SELECT SNO FROM SC WHERE CNO=′DB′AND GRADE＞=60 AND 90D．SELECT SNO FROM SC WHERE CNO=′DB′AND GRADE＜=60 AND GRADE＞=90
已知关系模式：sc(sno, sname, grade)，各属性含义依次为学号、课程名、分数。要查找“数据库”课分数最高的学生的学号，正确的SQL语句是A．SELECT sno FROM sc WHERE sname="数据库" AND grade=MAX(grade)B．SELECT sno FROM sc FOR sname="数据库" OR grade＞=MAX(grade)C．SELECT sno FROM sc WHERE sname="数据库" AND grade=(SELECT MAX(grade) FROM scD．SELECT sno FROM sc FOR sname="数据库" OR grade=(SELECT MAX (grade) FROM sc
有如下程序： infocase$=InputBox("Inputoneletter:") Select Case infocase$ case"a" grade$="Verygood" case"b" grade$="Good" case"C" grade$="OK" case"d" grade$="Qualified" case Else grade$="Bab" End SelectA．Very goodB．GoodC．BadD．Qualified
使用VC6打开考生文件夹下的工程test21_1，此工程包含一个源程序文件test21_1.cpp，但该程序运行有问题，请改正程序中的错误，使程序的输出结果如下：The grade is 3源程序文件test21_1.cpp清单如下：include＜iostream.h＞class student{private：int grade；public:/**************** found*******************/student(int thegra):(thegra){}～student(){}int get_grade(){return grade；}}；void main(){int thegra=3；/**************** found*******************/student point=new student(thegra)；/**************** found*******************/cout＜＜"The grade is"＜＜point.get_grade()＜＜endl；delete point；}
设有如下关系： SC(sno，cname，grade)(各属性含义分别为学生的学号、课程名称、成绩)现要将所 有学生的课程成绩增加10分，以下能正确地完成此操作的SQL命令是( )。A．MODIFY sc SET grade+10B．UPDATE sc SET grade+10C．MODIFY sc SET grade=grade+10D．UPDATE sc SET grade=grade+10
在关系SC中，查询学习课程号为'OB'，且成绩在60至90之间的学生学号的正确的 SQL命令是A．SELECT SNO FROMSC WHERE CNO＝'DB' AND GRADE BETWEEN 60 AND 90B．SELECT SNO FROM SC WHERE CNO＝'DB' OR GRADE BETWEEN 60 AND 90C．SELECT SNO FROM SC WHERE CNO＝'DB' AND GRADE＞=60 AND 90D．SELECTSNO FROM SCWHERECNO＝'DB' AND GRADE＜＝60 AND GRADE＞＝90
若要使所有学科80分以上的成绩都增加5%, 80至60分的成绩都增加10%，应如何更新数据库（ ）。 A．UPDATE SC SET GRADE=GRADE*1．05 WHERE SC．GRADE=80 UPDATE SC SET GRADE=GRADE* 1．10 WHERE SC．GRADE=60 AND SC．GRADE =80 B．UPDATE SC SET GRADE=GRADE* 1．10 WHERE SC．GRADE=60 AND SC．GRADE=80 UPDATE SC SET GRADE=GRADE* 1．05 WHERE SC．GRADE=80 C．UPDATE SC SET GRADE=GRADE* 1．05 WIRE SC．GRADE=80 AND SET GRADE =GRADE* 1．10 WHARE SC．GRADE=60 D．UPDATE SC SET GRADE=GRADE* 1．10 WHERE SC．GRADE=60 AND SC．GRADE =80 AND SET GRADE=GRADE* 1．05 WHERE SC．GRADE=80
在Visual FoxPro中，打开一个名为GRADE的数据库，应使用命令A．CREATE DATABASE GRADEB．OPEN DATABASE GRADEC．CREATE GRADED．OPEN GRADE
设在SQL Server 2008某数据库中有表SC（Sn0，Cn0，Grade），其中Grade列的类型为int。若在查询成绩时，希望将成绩按“优”、“良”、“中”、“及格”和“不及格”形式显示，则下列Case函数中正确的是（ ）。A.Case GradeWhen Grade between 90 and 100 THEN Grade=ˊ优ˊWhen Grade between 80 and 89 THEN Grade=ˊ良ˊWhen Grade between 70 and 79 THEN Grade=ˊ由ˊWhen Grade between 60 and 69 THEN Grade=ˊ及格ˊElse Grade=ˊ不及格ˊEndB.Case GradeWhen Grade between 90 and 100 THEN ˊ优ˊWhen Grade between 80 and 89 THEN ˊ良ˊWhen Grade between 70 and 79 THENˊ中ˊWhen Grade between 60 and 69 THENˊ及格ˊElseˊ不及格ˊEndC.CaseWhen Grade between 90 and 100 THEN Grade=ˊ优ˊWhen Grade between 80 and 89 THEN Grade=ˊ良ˊWhen Grade between 70 and 79 THEN Grade=ˊ由ˊWhen Grade between 60 and 69 THEN Grade=ˊ及格ˊElse Grade=ˊ不及格ˊEndD.CaseWhen Grade between 90 and 100 THENˊ优ˊWhen Grade between 80 and 89 THEN ˊ良ˊWhen Grade between 70 and 79 THEN ˊ由ˊWhen Grade between 60 and 69 THEN ˊ及格ˊElseˊ不及格ˊEnd
设有如下关系 SC(sno，cname，grade)(各属性含义分别为学生的学号、课程名称、成绩)现要将所有学 生的课程成绩增加10分，以下能正确地完成此操作的SQL命令是A． MODIFYScSET grade+10B．UPDATEScSET grade+10C．MODIFYScSET grade=grade+10D．UPDATEScSET grade=grade+10
12．A． grade one，class fourB． class four，grade oneC． Grade One，Class FourD． Class Four，Grade One
候选小区评估使用Grade算法,En_Load_Order=Enable时,GRADE(n)的计算与下面哪些因素有关?() A.PBGT（n）B.LINKfactor（0，n）C.LOADfactor（n）D.FREEfactor（n）
Camphor oil is classified as a ______．A.Grade A flammable liquidB.Grade C flammable liquidC.Grade D combustible liquidD.Grade E combustible liquid
设SC表中记录成绩的列为：Grade，类型为int。若在查询成绩时，希望将成绩按‘优’、‘良’、‘中’、‘及格’和‘不及格’形式显示，正确的Case函数是（）。A Case Grade When 90~100 THEN ’优’ When 80~89 THEN ’良’ When 70~79 THEN ’中’ When 60~69 THEN ’及格’ Else ’不及格’ EndB Case When Grade between 90 and 100 THEN Grade = ’优’ When Grade between 80 and 89 THEN Grade = ’良’ When Grade between 70 and 79 THEN Grade = ’中’ When Grade between 60 and 69 THEN Grade = ’及格’ Else Grade = ’不及格’ EndC Case When Grade between 90 and 100 THEN ’优’ When Grade between 80 and 89 THEN ’良’ When Grade between 70 and 79 THEN ’中’ When Grade between 60 and 69 THEN ’及格’ Else ’不及格’ EndDCase Grade When 90~100 THEN Grade = ’优’ When 80~89 THEN Grade = ’良’ When 70~79 THEN Grade = ’中’ When 60~69 THEN Grade = ’及格’ Else Grade = ’不及格’ End
在linux系统中，若要建立组class，且组的id号要指定为600，应执行的命令是（）。A、groupadd -r 600 classB、groupadd -f 600 classC、groupadd -u 600 classD、groupadd -g 600 class
在linux系统中，如果想增加一个系统组class，应使用的命令是（）。A、groupadd classB、groupadd -g classC、groupadd -r classD、groupadd -o class
设在某SELECT语句的WHERE子句中，需要对Grade列的空值进行处理。下列关于空值的操作，错误的是（）。A、Grade IS NOT NULLB、Grade IS NULLC、Grade = NULLD、NOT （Grade IS NULL）
CGN（运营商NAT）是以下哪个英语的缩写A、Carrier-Grade NETB、Carrier-Grade NetworkC、Carrier-Grade NetworkingD、Carrier-Grade NAT
学生选课信息表：sc（sno，cno，grade），主键为（sno，cno），从学生选课信息表中找出无成绩的元组的SQL语句是（）。A、SELECT * FROM sc WHERE grade=NULLB、SELECT * FROM sc WHERE grade IS“ ”C、SELECT * FROM sc WHERE grade=‘ ’D、SELECT * FROM sc WHERE grade IS NULL
候选小区评估使用Grade算法，En_Load_Order=Enable时，GRADE（n）的计算与下面哪些因素有关？（）A、PBGT（n）B、LINKfactor（0，n）C、LOADfactor（n）D、FREEfactor（n）
单选题在linux系统中，更改组class的组名为grade，应执行（）命令。Agroupmod -l grade classBgroupmod -n grade classCchgroup -l grade classDchgroup -n grade class
单选题设SC表中记录成绩的列为：Grade，类型为int。若在查询成绩时，希望将成绩按‘优’、‘良’、‘中’、‘及格’和‘不及格’形式显示，正确的Case函数是（）。A Case Grade When 90~100 THEN ’优’ When 80~89 THEN ’良’ When 70~79 THEN ’中’ When 60~69 THEN ’及格’ Else ’不及格’ EndB Case When Grade between 90 and 100 THEN Grade = ’优’ When Grade between 80 and 89 THEN Grade = ’良’ When Grade between 70 and 79 THEN Grade = ’中’ When Grade between 60 and 69 THEN Grade = ’及格’ Else Grade = ’不及格’ EndC Case When Grade between 90 and 100 THEN ’优’ When Grade between 80 and 89 THEN ’良’ When Grade between 70 and 79 THEN ’中’ When Grade between 60 and 69 THEN ’及格’ Else ’不及格’ EndDCase Grade When 90~100 THEN Grade = ’优’ When 80~89 THEN Grade = ’良’ When 70~79 THEN Grade = ’中’ When 60~69 THEN Grade = ’及格’ Else Grade = ’不及格’ End