如果学生表STUDENT是使用下面的SQL语句创建的：CREATE TABLE STUDENT(SNO C(4) PRIMARY KEY NOT NULL,,；SN C(8)，；SEX C(2)，；AGE N(2) CHECK(AGE＞15 AND AGE＜30))下面的SQL语句中可以正确执行的是( )。AA．BB．CC．DD．答案
如果学生表STUDENT是使用下面的SQL语句创建的：
CREATE TABLE STUDENT(SNO C(4) PRIMARY KEY NOT NULL,,；
SN C(8)，；
SEX C(2)，；
AGE N(2) CHECK(AGE＞15 AND AGE＜30))
下面的SQL语句中可以正确执行的是( )。
A
A．B
B．C
C．D
D．答案
相关考题：
若用如下的SQL语句创建一个student表： CREATE TABLE student (NO C(4) NOT NULL，NAME C(8) NOT NULL， SEX C(2)，AGE N(2)) 可以插入到student表中的是A．('1031'，'李林'，男，23)B．('1031'，'李林'，NULL)C．(NULL，'李林'，'男'，'23')D．('1031'，NULL，'男'，23)
用以下SQL语句创建了表名为学生的关系表。create table 学生(学号 char(9) primary key,身份证号 char(18),姓名 varchar(8),性别 char(2),所属学院 varchar(20),专业 varchar (20),届次 char(4),出生日期 date,宿舍 int,简历 image);请写出查询全体学生的姓名及其年龄的SQL语句。
设有学生数据库：student(sno，sname，sex，age，dept)。现要查询所有刘姓学生的信息，可使用如下的 SQL语句：SELECT*FROM student WHERE【 】。
You need to modify the STUDENTS table to add a primary key on the STUDENT_ID column. The table is currently empty. Which statement accomplishes this task?() A. ALTER TABLE students ADD PRIMARY KEY _ id;B. ALTER TABLE students ADD CONSTRAINT PRIMARY KEY (student_id);C. ALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY student_id;D. ALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY (student_id);E. ALTER TABLE students MODIFY CONSTRAINT stud_id_pk PRIMARY KEY (student_id);
根据SQL标准，删除表student中对字段sno的唯一性约束，应该使用下面哪条语句? ()A drop sno from table studentB alter table student drop snoC alter table student drop unique(sno)D alter table student drop sno unique
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
如果学生表STUDENT是使用下面的SQL语句创建的CREATE TABLE STUDENT(SNO C(4) PRIMARY KEY NOT NULL，；SN C(8)，；SEX C(2)，；AGE N(2) CHECK(AGE＞15 AND AGE＜30))下面的SQL语句中可以正确执行的是A．INSERT INTO STUDENT(SNO,SEX,AGE)VALUES (“S9”，“男”，17)B．INSERT INTO STUDENT(SN,SEX,AGE)VALUES (“李安琦”，“男”，20)C．INSERT INTO STUDENT(SEX,AGE)VALUES (“男”，20)D．INSERT INTO STUDENT(SNO,SN)VALUES (“S9”，“安琦”，16)
如果学生表STUDENT是使用下面的SQL语句创建的： CREATE TABLE STUDENT(SNO C(4)PRIMARY KEY NOT NULL． SN C(8)， SEX C(2)， AGE N(2)CHECK(AGE15 AND AGE25)) 下面的SQL语句中可以正确执行的是（ ）。A. INSERT INTO STUDENT(SN，SEX，AGE)VALUES(”王磊”，”男”，20)B. INSERT INTO STUDENT(SN0，SEX，AGE)VALUES(”S9”，”男”，17)C. INSERT INTO STUDENT(SEX，AGE)VALUES(”男”，20)D. INSERT INTO STUDENT(SN0，SN，AGE)VALUES(”S9”，”王磊”，14)
如果学生表student是使用下面的SQL谙句创建的： CREATE TABLE student(学号C(6)PRIMARY KEY NOT NULL，姓名C(8)，性别C(2)，年龄N(2) CHECK(年龄15 AND年龄30，)) 则下面的SQL语句中可以正确执行的是（ ）。A. INSERT INTO student(学号，性别，年龄)VALUES(”0542”，”李雷”，”男”，17)B. INSERT INTO student(学号，性别，年龄)VALUES(”李雷”，”男”，20)C. INSERT INTO student(学号，性别，年龄)VALUES(”女”，25)D. INSERT INTO student(学号，性别，年龄)VALUES(”0897”，”安宁”，”女”，30)
如果学生表STUDENT是使用下面的SQL语句创建的 CREATE TABLE STUDENT(SNOC(4)PR1MARY KEY NOTNULL； SNC(8)，； SEXC(2)，； AGEN(2)CHECK(AGE＞15AND AGE＜30) 下面的SQI语句中可以正确执行的是 ______。A．INSERT INTO STUDENT(SNO，SEX，AGE)valueS("S9"，"男"，17)B．INSERT INTO STUDENT(SNO，SEX，AGE)valueS(“李安琦”，“男”，20)C．INSERT INTO STUDENT(SEX，AGE)valueS(“男”，20)D．INSERT INTO STUDENT(SNO，SN)valueS("S9"，“安琦”，16)
建立一个学生信息表student，要求它由学号sno、姓名sname、性别sex、年龄age4个属性组成，其学号属性唯一，学号、姓名字段不能为空。下列语句正确的是A．CREATE TABLE student(sno char(5) NOT NULL sname char(8) NOT NULL sex char(1) age int)；B．CREATE TABLE student (sno char(5) NOT NULL UNIQUE sname char(8) sex char(1) age int)；C．CREATE TABLE (sno char(5) NOT NULL UNIQUE sname char(8) NOT NULL sex char(1) age int)；D．CREATE TABLE student (sno char(5) NOT NULL UNIQUE sname char(8) NOT NULL sex char(1) age int)；
一个学生信息表student，要求它由学号sno，姓名sname，性别sex，年龄age，4个属性组成。现在对这个现有的表增加一个入学时间cometime字段为日期型，下列语句正确的是A．ALTER TABLE student ADD cometime DATE NOT NULL；B．ALTER TABLE student ADD cometime DATE；C．ALTER TABLE student DROP cometime DATE NOT NULL：D．ALTER TABLE student MODIFY cometime DATE；
若用如下的SQL语句创建一个student表： CREATE TABLE student( N0 C(4)NOT NULL, NAME C(8)NOT NULL, SEX C(2), AGE N(2) ) 可以插入到student表中的是A．('1031'，'曾华'，男，23)B．('1031'，'曾华'，NULL，NULL)C．(NULL，'曾华'，'男'，'23')D．('1031'，NULL，'男'，23)
建立一个学生信息表student,要求它由学号sno,姓名sname,性别sex,年龄age,4个属性组成,其学号属性惟一,学号、姓名字段不能为空。下列语句正确的是A．CREATE TABLE student (sno char(5）NOT NULL sname char(8）NOT NULL sex char age int）;B．CREATE TABLE student (sno char(5）NOT NULL UNIQUE sname char(8) sex char age int）;C．CREATE TABLE (sno char(5）NOT NULL UNIQUE sname char(8）NOT NULL sex char age int）;D．CREATE TABLE student (sno char(5）NOT NULL UNIQUE sname char(8）NOT NULL sex char age int）;
如果学生表student是使用下面的SQL语句创建的CREATE TABLE student(学号C(4)PRIMARY KEY NOT NULL，；姓名C(8)，；性别C(2)，；年龄N(2)CHECK(年龄1 5 AND年龄30))下面的SQL语句中可以正确执行的是（ ）。A)INSERT INTO student(学号，性别，年龄)VALUES(”0542”，”男”，l7)B)INSERT INTO student(姓名，性别，年龄VALUES(”李蕾”，”女”，20)C)INSERT INTO student(姓名，性别，年龄)VALUES(”男”，25)D)INSERT INTO student(学号，姓名)VALUES(”0897”，”安宁”，16)
You need to design a student registration database that contains several tables storing academic information. The STUDENTS table stores information about a student. The STUDENT_GRADES table stores information about the student's grades. Both of the tables have a column named STUDENT_ID. The STUDENT_ID column in the STUDENTS table is a primary key. You need to create a foreign key on the STUDENT_ID column of the STUDENT_GRADES table that points to the STUDENT_ID column of the STUDENTS table. Which statement creates the foreign key?（）A、CREATE TABLE student_grades (student_id NUMBER(12),semester_end DATE, gpa NUMBER(4,3), CONSTRAINT student_id_fk REFERENCES (student_id) FOREIGN KEY student (student_id));B、CREATE TABLE student_grades(student_id NUMBER(12),semester_end DATE, gpa NUMBER(4,3), student_id_fk FOREIGN KEY (student_id) REFERENCES students (student_id));C、CREATE TABLE student_grades(student_id NUMBER(12),semester_end DATE, gpa NUMBER(4,3), CONSTRAINT FOREIGN KEY (student_id) REFERENCES student (student_id));D、CREATE TABLE student_grades(student_id NUMBER(12),semester_end DATE, gpa NUMBER(4,3), CONSTRAINT student_id_fk FOREIGN KEY (student_id) REFERENCES students (student_id));
已知数据表Student存储在SQL Server服务器的School数据库中，用户名为sa，密码为xyz123，创建student数据表的命令为： CREATE TABLE Student （ SName varchar（20） Primary Key Not NULL， SPwd Varchar（15） Not NULL ） 试根据下面的代码使用命令对象完成在student数据表中插入一条记录。 % tname = Request.Form（"txtName"） ’接收到的用户名 tpwd = Request.Form（"txtPwd"） ’接收到的密码 %
在SQL Sever中，创建数据库student，使用的语句是（）。A、CREATE TABLE studentB、CREATE VIEW studentC、CREATE PROC studentD、CREATE DATABASE student
You need to modify the STUDENTS table to add a primary key on the STUDENT_ID column. The table is currently empty.Which statement accomplishes this task?（）A、ALTER TABLE students ADD PRIMARY KEY student_id;B、ALTER TABLE students ADD CONSTRAINT PRIMARY KEY (student _ id);C、ALTER TABLE students ADD CONSTRAINT stud _ id _pk PRIMARY KEY (student _ id);D、ALTER TABLE students MODIFY CONSTRAINT stud _ id _pk PRIMARY KEY (student _ id);
You need to modify the STUDENTS table to add a primary key on the STUDENT_ID column. The table is currently empty. Which statement accomplishes this task?（）A、ALTER TABLE students ADD PRIMARY KEY _ id;B、ALTER TABLE students ADD CONSTRAINT PRIMARY KEY (student_id);C、ALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY student_id;D、ALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY (student_id);E、ALTER TABLE students MODIFY CONSTRAINT stud_id_pk PRIMARY KEY (student_id);
You need to modify the STUDENTS table to add a primary key on the STUDENT_ID column. The table is currently empty.Which statement accomplishes this task?（）A、ALTER TABLE students ADD PRIMARY KEY student_id;B、ALTER TABLE students ADD CONSTRAINT PRIMARY KEY (student_id);C、ALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY student_id;D、ALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY (student_id);E、ALTER TABLE students MODIFY CONSTRAINT stud_id_pk PRIMARY KEY (student_id);
单选题在SQL Sever中，创建数据库student，使用的语句是（）。ACREATE TABLE studentBCREATE VIEW studentCCREATE PROC studentDCREATE DATABASE student
问答题已知数据表Student存储在SQL Server服务器的School数据库中，用户名为sa，密码为xyz123，创建student数据表的命令为： CREATE TABLE Student （ SName varchar（20） Primary Key Not NULL， SPwd Varchar（15） Not NULL ） 试根据下面的代码使用命令对象完成在student数据表中插入一条记录。
单选题You need to modify the STUDENTS table to add a primary key on the STUDENT_ID column. The table is currently empty. Which statement accomplishes this task?（）AALTER TABLE students ADD PRIMARY KEY _ id;BALTER TABLE students ADD CONSTRAINT PRIMARY KEY (student_id);CALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY student_id;DALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY (student_id);EALTER TABLE students MODIFY CONSTRAINT stud_id_pk PRIMARY KEY (student_id);
单选题You need to design a student registration database that contains several tables storing academic information. The STUDENTS table stores information about a student. The STUDENT_GRADES table stores information about the student's grades. Both of the tables have a column named STUDENT_ID. The STUDENT_ID column in the STUDENTS table is a primary key. You need to create a foreign key on the STUDENT_ID column of the STUDENT_GRADES table that points to the STUDENT_ID column of the STUDENTS table. Which statement creates the foreign key?（）ACREATE TABLE student_grades (student_id NUMBER(12),semester_end DATE, gpa NUMBER(4,3), CONSTRAINT student_id_fk REFERENCES (student_id) FOREIGN KEY student (student_id));BCREATE TABLE student_grades(student_id NUMBER(12),semester_end DATE, gpa NUMBER(4,3), student_id_fk FOREIGN KEY (student_id) REFERENCES students (student_id));CCREATE TABLE student_grades(student_id NUMBER(12),semester_end DATE, gpa NUMBER(4,3), CONSTRAINT FOREIGN KEY (student_id) REFERENCES student (student_id));DCREATE TABLE student_grades(student_id NUMBER(12),semester_end DATE, gpa NUMBER(4,3), CONSTRAINT student_id_fk FOREIGN KEY (student_id) REFERENCES students (student_id));
单选题You need to modify the STUDENTS table to add a primary key on the STUDENT_ID column. The table is currently empty. Which statement accomplishes this task?（）AALTER TABLE students ADD PRIMARY KEY student_id;BALTER TABLE students ADD CONSTRAINT PRIMARY KEY (student_id);CALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY student_id;DALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY (student_id);EALTER TABLE students MODIFY CONSTRAINT stud_id_pk PRIMARY KEY (student_id);
单选题You need to modify the STUDENTS table to add a primary key on the STUDENT_ID column. The table is currently empty.Which statement accomplishes this task?（）AALTER TABLE students ADD PRIMARY KEY student_id;BALTER TABLE students ADD CONSTRAINT PRIMARY KEY (student _ id);CALTER TABLE students ADD CONSTRAINT stud _ id _pk PRIMARY KEY (student _ id);DALTER TABLE students MODIFY CONSTRAINT stud _ id _pk PRIMARY KEY (student _ id);