下列四项中,正确的说法包括()。
A. SQL语言是关系数据库的国际标准语言
B. SQL语言具有数据定义、查询、操纵和控制功能
C. SQL语言可以自动实现关系数据库的规范化
D. SQL语言称为结构化查询语言
Listen to the recording and choose the correct answer to each question.[音频]Q: How old is the speaker?
A. 5 years old
B. 15 years old
C. 50 years old
D. 25 years old
Q: What is the speaker's room number?
A. 306
B. 360
C. 603
D. 630
[音频]Q: What is the flight number?
AT63
B. AT73
C. AT76
D. AT75