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相关试题
- 1.有学生表Student(S# char(8), Sname char(10), Ssex char(2),Sage integer, D# char(2), Sclass char(6))。若要“检索名字为姓张的所有同学姓名”，SQL语句正确的是（ ）选项： A:Select Sname From Student Where Sname Not Like ‘张_ _’ B:Select Sname From Student Where Sname Like ‘张_’ C:Select Sname From Student Where Sname Like ‘张_ _’ D:Select Sname From Student Where Sname Like ‘张%’
- 2.SQL语句中，下列查询姓张的学生的语句正确的是( )。 选项： A: SELECT*FROM表名WHERE姓名LIKE'张“ B: SELECT*FROM表名WHERE姓名='张%’ C: SELECT*FROM表名WHERE姓名='张' D: SELECT*FROM表名WHERE姓名LIKE张%'
- 3.有学生表Student(S# char(8), Sname char(10), Ssex char(2),Sage integer, D# char(2), Sclass char(6))。若要“检索名字为张某某的所有同学姓名”，SQL语句正确的是（ ）。选项： A:Select Sname From Student Where Sname Like ‘张_ _’;; B:Select Sname From Student Where Sname Like ‘张%’;; C:Select Sname From Student Where Sname Like ‘张_’;; D:Select Sname From Student Where Sname Not Like ‘张_ _’;
- 4.SQL语句中，下列查询姓张的学生的语句正确的是（ ）。 选项： A、SELECT * FROM 表名 WHERE 姓名 LIKE '张%' B、SELECT * FROM 表名 WHERE 姓名 = '张%' C、SELECT * FROM 表名 WHERE 姓名 = '张' D、SELECT * FROM 表名 WHERE 姓名 LIKE '张'
- 5.在SQL Server中，现有学生表Student，其字段有：Sname(学生姓名)，Sdept（学生系别），查询各系别姓张的学生的人数SQL语句是（ ） 选项： A、SELECT Sdept, Count(*) AS 张姓人数 FROM Student WHERE Sname LIKE '张_' GROUP BY Sdept B、SELECT Sdept, Count(*) AS 张姓人数 FROM Student WHERE Sname = '张%' GROUP BY Sdept C、SELECT Sdept, Count(*) AS 张姓人数 FROM Student WHERE Sname LIKE '张%' GROUP BY Sname D、SELECT Sdept, Count(*) AS 张姓人数 FROM Student WHERE Sname LIKE '张%' GROUP BY Sdept
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6.在HBase Shell操作中，请选择以下哪个命令用于删除整行操作（） 选项： A:
delete from ‘users’.’xiaoming’
B:delete from ‘users’.’xiaoming’
C:deleteall ‘users’,’xiaoming’
D:deleteall ‘xiaoming’
- 7.查询student表中的所有非空email信息，以下语句正确的是 选项： A: Select email from student where email！=null B: Select email from student where email not is null C: Select email from student where email nul1 D: Select email from student where email is not null
- 8. 若想查询student表中name为空值的记录，则正确的SQL语句是 1分 选项： A:select * from student where name = null; B:select * from student where name link null; C:select * from student where name = 'null'; D:select * from student where name is null;
- 9.查询student表中的所有非空emai1信息,以下语句正确的是 选项： A: Select email from student where email notis null B: Select email from student where email<>null C: Select email from student where emailis not null D: Select email from student where email! =null
- 10.查询student表中的所有非空emai1信息,以下语句正确的是 选项： A: Select email from student where email notis null B: Select email from student where email<>null C: Select email from student where emailis not null D: Select email from student where email! =null
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11.页面路由需要导入以下哪个模块 选项： A:
import prompt from ‘@ohos.prompt’
B:import router from ‘@ohos.router’
C:import Notification from ‘@ohos.notification’
D:import window from ‘@ohos.window’
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12.
单选题 （1分） 有关系S(SNO, SNAME, SAGE)，C(CNO, CNAME)，SC(SNO, CNO, GRADE)。其中SNO是学生号，SNAME是学生姓名，SAGE是学生年龄， CNO是课程号，CNAME是课程名称，GRADE是成绩。要查询选修了“Java程序设计”课的学生姓名，则SQL语句是： SELECT SNAME FROM S，C，SC WHERE子句。 这里的WHERE子句的内容是( )。
选项： A:S.SNO = SC.SNO and C.CNO = SC.CNO and CNAME=‘Java程序设计’
B:CNAME=‘Java程序设计’
C:S.SNO = SC.SNO and CNAME=‘Java程序设计’
D:C.CNO = SC.CNO and CNAME=‘Java程序设计’
- 13.已知学生成绩关系表，其模式为STUDENT（学号，姓名，数学，物理，英语），要若查找数学和物理成绩都在90分以上的学生名单，正确的SQL查询语句为________ 。选项： A:SELECT 学号，姓名 FROM STUDENT WHERE 数学>=90 OR 物理>=90; B:SELECT STUDENT FROM 学号，姓名 WHERE 数学>=90 AND 物理>=90; C:SELECT 学号，姓名 FROM 数学>=90 WHERE 物理>=90; D:SELECT 学号，姓名 FROM STUDENT WHERE 数学>=90 AND 物理>=90
- 14.查询student表中的所有非空email信息，以下语句正确的是 选项： A:Select email from student where email not is null B:Select email from student where emailnull C:Select email from student where email is not null D:Select email from student where email！=null
- 15.查询student表中的所有非空email信息，以下语句正确的是（ ）。 选项： A:Select email from student where email !=null B:Select email from student where email null C:Select email from student where email not is null D:Select email from student where email is not null
- 16.查询student表中的所有非空email信息, 以下语句正确的是()。 选项： A:Select email from student where email !=null B: Select email from student where email not is null C:Select email from student where email <> null D:Select email from student where email is not null
- 17.查询student表中的所有非空email信息，以下语句正确的是 选项： A:select email from student where email !=null B:select email from student where email not is null C:select email from student where email null D:select email from student where email is not null
- 18.查询student表中的所有非空email信息, 以下语句正确的是（ ）。 选项： A:SELECT email FROM student WHERE email !=null B:SELECT email FROM student WHERE email not is null C:SELECT email FROM student WHERE email null D:SELECT email FROM student WHERE email is not null
- 19.查询student表中的所有非空email信息, 以下语句正确的是（ ）选项： A:Select email from student where email !=null ; B:Select email from student where email not is null ; C:Select email from student where email <> null ; D:Select email from student where email is not null
- 20.查询Student表中的所有非空Email信息，以下语句正确的是( )。 选项： A:SELECT Email FROM Student WHERE Email! = NULL B:SELECT EmaU FROM Student WHERE Email NOT IS NULL C:SELECT Email FROM Student WHERE Email<>NULL D:SELECT EmaH FROM Student WHERE Email IS NOT NULL
- 21.若想查询student表中name为空值的记录，则正确的SQL语句是2分A、select * from student where name = null;B、select * from student where name link null;C、select * from student where name = 'null';D、select * from student where name is null;
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22.发起网络数据请求需要导入以下哪个模块 选项： A:
import http from ‘@ohos.net.http’
B:import http from ‘@ohos.net.https’
C:import request from ‘@ohos.request’
D:import request from ‘@ohos.net.request’
- 23.查询student表中的所有非空email信息, 以下语句正确的是()。 选项： A:Select email from student where email !=null B: Select email from student where email not is null C:Select email from student where email <> null D:Select email from student where email is not null
- 24.从Student表检索姓周的学生，对应的SQL语句是( )。选项： A:Select * From Student Where Sname like '周%'; B:Select * From Student Where Sname like '%周'; C:Select * From Student Where Sname like '_周'; D:Select * From Student Where Sname like '周_'
- 25.查询student表中的所有非空email信息，以下语句正确的是 选项： A:Select email from student where email not is null B:Select email from student where email＆lt;＆gt;null C:Select email from student where email is not null D:Select email from student where email！=null
- 26.从Student表检索姓周的学生，对应的SQL语句是( )。 选项： A、Select * From Student Where Sname like '周%' B、Select * From Student Where Sname like '%周' C、Select * From Student Where Sname like '_周' D、Select * From Student Where Sname like '周_'
