【单选题】使用命令添加用户student,设置密码为student,然后使用命令删除该用户。
A. useradd student passwd student userdel student B. useradd student passwd student sudo userdel student C. useradd student sudo passwd student sudo userdel student D. su root useradd student passwd student userdel student
A. useradd student passwd student userdel student B. useradd student passwd student sudo userdel student C. useradd student sudo passwd student sudo userdel student D. su root useradd student passwd student userdel student
su root useradd student passwd student userdel student
举一反三
- 使用useradd命令添加用户student，然后使用userdel删除该用户。
- 删除数据表student的命令是________。 A: drop table student; B: drop student; C: delete table student; D: drop student;
- 【单选题】删除 student 表的所有数据 A. delete * from student B. delete all from student C. delete from student D. delete rows from student
- 【单选题】定义一个学生类Student,则初始化一个学生对象的语句是( A. Student s ； B. Student s = new Student(); C. Student s = new student(); D. Student s = s.student();
- 要显示表student的表结构，可以使用命令______。 A: STRUCTURE student; B: DESCRIBE student; C: SHOW CREATE TABLE student; D: VIEW student;
内容
- 0
一数据库名为student，要想打开该数据库，应使用命令 A: OPEN student B: OPEN DATABASE student C: USE DATABASE student D: USE student
- 1
一数据库名为student，要想打开该数据库，应使用的命令（） A: OPEN student B: OPEN DATABASE student C: USE student D: USE DATABASE student
- 2
修改student表结构需要使用命令:student
- 3
删除数据表student的命令是________。 A: droptablestudent; B: drop student; C: deletetablestudent; D: drop student
- 4
如果要删除数据库中已经存在的表Student，可以使用（）。 A: DELETE TABLE Student B: DELETE Student C: DROP TABLE Student D: DROP Student