Câu 28: 1D0-541: CIW v5 Database Design Specialist
Several SQL operations are performed by User 1 to access the Fee information for Bowling in the Act_Fee relation (shown in the exhibit). The first access returns a fee of 50. An unrelated SQL operation by another user updates the Bowling fee to 60. The second access by User 1 returns a fee of 60. What problem has occu…
Nội dung câu hỏi
Several SQL operations are performed by User 1 to access the Fee information for Bowling in the Act_Fee relation (shown in the exhibit). The first access returns a fee of 50. An unrelated SQL operation by another user updates the Bowling fee to 60. The second access by User 1 returns a fee of 60. What problem has occurred?
Các lựa chọn
Đáp án được giữ gọn theo nhãn A, B, C, D trong phần bình chọn tương tác.
- A. Rollback
- B. Deadlock
- C. Dirty read
- D. No problem has occurred. — đáp án hiện tại
Cộng đồng
0 bình luận công khai. Tên thành viên được ẩn một phần.