Explanation: Read committed is used to commit the default read operation. 10. SQL can be used to:
A. Create database structures only.
B. Query database data only.
C. Modify database data only.
D. All of the above can be done by SQL
Answer:A
Explanation: Read committed is used to commit the default read operation. 10. SQL can be used to:
A. Create database structures only. B. Query database data only. C. Modify database data only. D. All of the above can be done by SQL
Explanation: In a concurrent execution of these transactions, it is intuitively clear that they conflict, but this is a conflict not captured by our simple model. This situation is referred to as the phantom phenomenon, because a conflict may exist on “phantom” data. Sanfoundry Global Education & Learning Series – Database Management System.