由于学号(SN)为00291的学生已毕业，欲在关系“Student”中删除该学生的所有信息，用元组关系演算语言实现应为________。
A: GET W (Student): Student. SN = 00291"DELETE W
B: GET W: Student. SN = 00291"in StudentDELETE W
C: HOLD W (student): Student. SN = 00291"DELETE W
D: HOLD W: Student. SN = 00291"in StudentDELETE W
A: GET W (Student): Student. SN = 00291"DELETE W
B: GET W: Student. SN = 00291"in StudentDELETE W
C: HOLD W (student): Student. SN = 00291"DELETE W
D: HOLD W: Student. SN = 00291"in StudentDELETE W
举一反三
- 已知s1="I "am a student.",s2='I \'am a student',则print(s1,s2)的输出结果为( ) A: I 'am a student. I 'am a student B: I "am a student. I 'am a student C: I "am a student. I \'am a student D: 程序报错
- If the teacher fails the student, there will be trouble for the student.
- 删除学生信息表student的所有数据，正确的语句为（ ）。 A: delete from student B: drop all from student C: delete all * from student D: drop table student
- You must be an active student ______ a passive student.
- She is a new student. (改为一般疑问句） A: She is a new student? B: She isn't a new student? C: Is she a new student? D: Isn't she a new student?