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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)
参考答案
更多 “ 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) ” 相关考题
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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);
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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);
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单选题在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
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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。
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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?（）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);
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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?（）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));
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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?（）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);
考题
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?（）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);
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