使用select top 5 * from employee语句得到的结果集中有（）条记录。A、10B、2C、5D、6
使用select top 5 * from employee语句得到的结果集中有（）条记录。
- A、10
- B、2
- C、5
- D、6
相关考题：
使用如下3个表：职员.DBF：职员号C(3)，姓名C(6)，性别C(2)，组号N(1)，职务C(10)客户.DBF：客户号C(4)，客户名C(36)，地址C(36)，所在城市C(36)订单.DBF：订单号C(4)，客户号C(4)，职员号C(3)，签订日期D，金额N(6，2)查询金额最大的那10%订单的信息。正确的SQL语句是______。A．SELECT*TOP 10 PERCENT FROM 订单B．SELECT TOP 10% *FROM 订单 ORDER BY 金额C．SELECT*TOP 10 PERCENT FROM 订单 ORDER BY 金额D．SELECT TOP 10 PERCENT * FROM 订单 ORDER BY 金额 DESC
在成绩表中要求按“总分”降序排列，并查询前3名学生的记录，正确的命令是A．SELECT * TOP 3 FROM成绩表； WHERE总分DESCB．SELECT * TOP 3 FROM成绩表； FOR总分DESCC．SELECT * TOP 3 FROM成绩表； GROUP BY总分DESCD．SELECT * TOP 3FROM成绩表； ORDER BY总分DESC
查询金额最大的那10%订单的信息。正确的SQL语句是A．SELECT*TOP l0 PERCENT FROM订单B．SELECT TOP l0%*FROM 订单 ORDER BY金额C．SELECT*TOP l0 PERCENT FROM 订单 ORDER BY 金额D．SELECT TOP l0 PERCENT*FROM 订单 ORDER BY 金额 DESC
在成绩表中要求按“物理”降序排列，并查询前两名的学生姓名，正确的语句是( )。A．SELECT 姓名 TOP 2 FROM 成绩表 WHERE 物理 DESCB．SELECT 姓名 TOP 2 FROM 成绩表 FOR 物理 DESCC．SELECT 姓名 TOP 2 FROM 成绩表 GROUP BY 物理 DESCD．SELECT 姓名 TOP 2 FROM 成绩表 ORDER BY 物理 DESC
在成绩表中要求按“物理”降序排列，并查询前两名的学生姓名，正确的语句是（ ）。A.SELECT姓名TOP 2 EROM成绩表WHERE物理 DESCB.SEl．ECT姓名TOP 2 FROM成绩表FOR物理DFAKCC.SELECT姓名TOP 2 FROM成绩表GROUP BY物 理DESCD.SELECT姓名TOP 2 FROM成绩表ORDER BY物 理DESC
查淘金额最大的10%的订单信息。正确的SQL语句是( )。A．SELECT*TOP l0 PERCENT FROM 订单B．SELECTTOP 10%*FROM 订单 ORDER BY 金额C．SELECT*TOP l0 PERCENT FROM 订单 ORDER BY 金额D．SELECTTOP l0 PERCENT*FROM 订单 ORDER BY 金额 DESC
要从学生表(学号、姓名、性别、出生年月、入校总分、三好生)中查询入校总分最高的3个学生的记录，应使用的SELECT SQL语句是 ______。A．SELECT*FROM学生表ORDER BY入校总分ASCB．SELECT FROM学生表ORDER BY入校总分DESCC．SELECT FROM学生表TOP 3 ORDER BY入校总分ASCD．SELECT FROM学生表TOP 3 ORDER BY入校总分DESC
限制从EMP表中只选出前5条记录的查语句为()。 A.SELECT TOP 5 * FROM EMPB.SELECT DISTINCT 5 * FROM EMPC.SELECT * FROM EMP WHERE ROWNUM6D.SELECT * FROM EMP WHERE ROWNUM=5
成绩表grade中字段score代表分数，以下（）语句返回成绩表中的最低分。（选择两项）A、select max(score) from gradeB、select top 1 score from grade order by score ascC、Select min(score) from gradeD、select top 1 score from grade order by score desc
以下（）语句从表TABLE_NAME中提取前10条记录。A、select * from TABLE_NAME where rowcount=10B、select TOP 10 * from TABLE_NAMEC、select TOP of 10 * from TABLE_NAMED、select * from TABLE_NAME where rowcount=10
下列查询年龄最大的前四个学生（包括并列的情况）的语句，正确的是（）。A、SELECT TOP 4 WITH TIES * FROM Student ORDER BY Sage ASCB、SELECT TOP 4 WITH TIES * FROM Student GROUP BY Sage ASCC、SELECT TOP 4 WITH TIES * FROM Student ORDER BY Sage DESCD、SELECT TOP 4 WITH TIES * FROM Student GROUP BY Sage DESC
在ACCESS“学生”表中有学号、姓名、性别、入学成绩、身高字段。现需查询女生中身高最高的前三个学生的记录信息，正确的SQL语句是（）。A、select * from学生 Where性别=”女”Group by身高B、select * from学生 Where性别=”女”order by身高C、select TOP3* from学生 Where性别=”女”Group by身高D、select TOP3* from学生 Where性别=”女”order by身高
V5.x系统中，用SQL语句查询Sybase版本的语句是（）A、select ##versionB、select ##version from masterC、select @@version from masterD、select @@version
一个电视经销商在表Tvtype中维护库存的电视信息，下述（）语句能显示价格（iprice）最昂贵的三种电视机的信息（cDiscription）A、select top3 cDiscription fromTvtype order by iprice ascB、select cDiscription from Tvtype where max（iprice）3C、select top3 cDiscription from Tvtype order by iprice descD、selec tcDiscription max（iprice）from Tvtype order by iprice
查询金额最大的那10%订单的信息。正确的SQL语句是（）。A、SELECT * TOP 10 PERCENT FROM 订单B、SELECT TOP 10% * FROM 订单 ORDER BY 金额C、SELEC T* TOP 10 PERCENT FROM 订单 ORDER BY 金额D、SELECT TOP 10 PERCENT * FROM 订单 ORDER BY 金额 DESC
现有书目表book，包含字段：price（float）；现在查询一条书价最高的书目的详细信息，以下语句正确的是（）A、select top 1 * from book order by price ascB、select top 1 * from book order by price descC、select top 1 * from book where price= (select max (price)from book)D、select top 1 * from book where price= max(price)
现有表Employee，字段：id（int）、firstname（varchar）、lastname（varchar）；以下sql语句错误的是（）A、select firstname+’.’+lastnameas’name’from employeeB、select firstname+’.’+lastname=’name’from employeeC、select’name’=firstname+’.’+lastnamefrom employeeD、select firstname，lastname from employee
成绩表grade中字段st_id代表学号，score代表分数，以下（）语句返回成绩表中的最低分。A、SELECT max(score) FROM gradeB、SELECT TOP 1 score FROM grade ORDERBY score ASCC、SELECT st_id，MIN(score) FROM gradeD、SELECT TOP 1 score FROM grade ORDERBY score DESC
Examine the structure of the EMPLOYEES and NEW_EMPLOYEES tables: EMPLOYEES EMPLOYEE_ID NUMBER Primary Key FIRST_NAME VARCHAR2(25) LAST_NAME VARCHAR2(25) HIRE_DATE DATE NEW_EMPLOYEES EMPLOYEE_ID NUMBER Primary Key NAME VARCHAR2 (60) Which DELETE statement is valid?（）A、DELETE FROM employees WHERE employee_id = (SELECT employee_id FROM employees);B、DELETE * FROM employees WHERE employee_id = (SELECT employee_id FROM new_ employees);C、DELETE FROM employees WHERE employee_id IN (SELECT employee_id FROM new_employees WHERE name = 'carrey');D、DELETE * FROM employees WHERE employee_id IN (SELECT employee_id FROM new_employees WHERE name = 'carrey');
限制从EMP表中只选出前5条记录的查语句为（）。A、SELECT TOP 5 * FROM EMPB、SELECT DISTINCT 5 * FROM EMPC、SELECT * FROM EMP WHERE ROWNUM6D、SELECT * FROM EMP WHERE ROWNUM=5
单选题SQL语句“select count（*）from employee”，需要SqlCommand对象的哪一个方法在执行（）。AExecuteNonQuery（）BExecuteScalar（）CEndExecuteReader（）DExecuteXmlReader（）
多选题现有书目表book，包含字段：price（float）；现在查询一条书价最高的书目的详细信息，以下语句正确的是（）Aselect top 1 * from book order by price ascBselect top 1 * from book order by price descCselect top 1 * from book where price= (select max (price)from book)Dselect top 1 * from book where price= max(price)
单选题Examine the structure of the EMPLOYEES and NEW_EMPLOYEES tables: EMPLOYEES EMPLOYEE_ID NUMBER Primary Key FIRST_NAME VARCHAR2 (25) LAST_NAME VARCHAR2 (25) HIRE_DATE DATE NEW EMPLOYEES EMPLOYEE_ID NUMBER Primary Key NAME VARCHAR2 (60) Which DELETE statement is valid? （）ADELETE FROM employees WHERE employee_id = (SELECT employee_id FROM employees);BDELETE * FROM employees WHERE employee_id = (SELECT employee_id FROM new_ employees);CDELETE FROM employees WHERE employee_id IN (SELECT employee_id FROM new_employees WHERE name = ('Carrey')'DDELETE * FROM employees WHERE employee_id IN (SELECT employee_id FROM new_employees WHERE last_ name = ('Carrey')'
单选题以下（）语句从表student中提取前5条记录。Aselect * from student where rowcount=5Bselect TOP of 5*from studentCselect TOP5 * from studentDselect * from student where rowcount=5