年龄结构（Age Structure）
年龄结构（Age Structure）
相关考题：
●在SQL中，下列涉及空值的操作，不正确的是 (23) 。(23) A．AGE IS NULLB．AGE IS NOT NULLC．AGE=NULLD．NOT(AGE IS NULL)(23) A．AGE IS NULLB．AGE IS NOT NULLC．AGE=NULLD．NOT(AGE IS NULL)
数据库SQL语言中，AGE IN(15，35)短语的正确含义是(14)。A．AGE=15AND AGE=35B．AGE=15 OR AGE=35C．AGE＜=35 AND AGE＞=15D．AGE＜35 AND AGE＞15
SQL中，“AGE IN(15，35)”短语的正确含义是( )。A．AGE=15 AND AGE=35B．AGE=15 OR．AGE=35C．AGE＜=35 AND AGE＞=15D．AGE＜35 AND AGE＞15
M．Jackson suggested the data structure oriented software design method．Which of the following structure can be introduced by using input data structure?A．algorithm structureB．procedure structureC．code structureD．program structure
SQL中，“AGE IN(15，35)”短语的正确含义是A．AGE=15 AND AGE=35B．AGE=15 OR AGE=35C．AGE＜=35 AND AGE＞=15D．AGE＜35 AND AGE＞15
17 ) SQL 中， " AGE IN （ 15 ， 35 ) " 短语的正确含义是A ) AGE = 1 5 AND AGE = 35B ) AGE = 1 5 OR AGE = 35C ) AGE = 35 AND AGE = 15D ) AGE 3 5 AND AGE 15
classMyApp{publicstaticvoidmain(String[]args){intage;System.out.println(age=”＋age);}}执行上述代码后输出的结果是哪项?() A.age=0B.age=nullC.age=D.程序编译错误
根据SQL标准，要查询表student中平均年龄age小于21的所在系dept及其平均年龄值，下面哪条语句适用?()A select dept,avg(age) from student where avg(age)B select dept,avg(age) from student group by dept having avg(age)C select dept,avg(age) from student having avg(age)D select dept,avg(age) from student group by dept where avg(age)
根据SQL标准，要修改表student中所有学生的年龄age，使之在原值基础上减一，下面哪个语句适用?()A update student set age = 1B update student set age = age - 1C update age = age -1 from studentD update from student where age = age -1
根据SQL标准，下面哪句语句能够找出年龄最小的同学?其中age为学生表student中的年龄字段，sno为学生的学号。()A select max(age) from studentB select sno from student where age = max(age)C select sno from student having age = max(age)D select sno from student a where a.age
根据SQL标准，下面哪条语句与select min(age) from student等效?()A select age from student where age >= min(age)B select distinct age from student where age >= all min(age)C select distinct a.age from student a where a.ageD select distinct a.age from student a where a.age
在Visual FoxPro中，使用SQL命令将学生表STUDENT中的学生年龄AGE字段的值增加1岁，应该使用的命令是A）REPLACEAGE WITH AGE+1B）UPDATE STUDENT AGE WITH AGE+1C）UPDATE SET AGE WITH AGE+1D）UPDATE STUDENT SET AGE=AGE+1
与WHERE AGE BETWEEN 18 AND 23完全等价的是( )。A.WHERE AGE>18AND AGEB.WHERE AGE>=18AND AGEC.WHERE AGE>18AND AGED.WHERE AGE>=18AND AGE
检索所有比“王华”年龄大的学生姓名、年龄和性别。正确的SELECT语句是______。A．SELECT SN,AGE,SEX FROM S WHERE AGE＞(SELECT AGE FROM S WHERE SN='王华')B．SELECT SN,AGE,SEX FROM S WHERE SN='王华'C．SELECT SN,AGE, SEX FROM S WHERE AGE＞(SELECT AGE WHERE SN='王华')D．SELECT SN,AGE,SEX FROM S WHERE AGE＞王华 AGE
The three main things that a learner has to acquire when learning a new structure are the form, meaning and（）of the structure.
在VisualFoxPro中，使用SQL命令将学生STUDENT中的学生年龄AGE字段的值增加1岁，应该使用的命令是（）。A、REPLACE AGE WITH AGE+1B、UPDATE STUDENT AGE WITH AGE+1C、UPDATE SET AGE WITH AGE+1D、UPDATE STUDENT SET AGE=AGE+1
在Visual FoxPro中，使用SQL命令将学生表STUDENT中的AGE字段的值增加5岁，应使用的命令是（）。A、A ．REPLACE AGE WITH AGE+5B、B ．UPDATE STUDENT AGE WITH AGE+5C、C ．UPDATE SET AGE WITH AGE+5D、D ．UPDATE STUDENT SET AGE=AGE+5
使用SQL命令将学生表STUDENT中的学生年龄AGE字段的值增加1岁，应该使用的命令是（）。A、REPLACE AGE WITH AGE+1B、UPDATE STUDENT AGE WITH AGE+1C、UPDATE SET AGE WITH AGE+1D、UPDATE STUDENT SET AGE=AGE+1
class MyApp{ public static void main（String[] args）{ int age； System.out.println（“age=”+age）； } } 执行上述代码后输出的结果是哪项？（） A、age=0B、age=nullC、age=D、程序编译错误
单选题在Visual FoxPro中，使用SQL命令将学生表STUDENT中的AGE字段的值增加5岁，应使用的命令是（）。AA ．REPLACE AGE WITH AGE+5BB ．UPDATE STUDENT AGE WITH AGE+5CC ．UPDATE SET AGE WITH AGE+5DD ．UPDATE STUDENT SET AGE=AGE+5
单选题A data manipulation language statement （）.Acompletes a transaction on a tableBmodifies the structure and data in a tableCmodifies the data but not the structure of a tableDmodifies the structure but not the data of a table
在数据库查询语句中，“age between 30 and 40”等同于（ ） (1.0分) [单选.] A. age>=30 or age=30 and age30 and age30 or age<40