Question

What are the types of log records?

1) Records that transaction T has read the value of database item X.
2) Records that transaction T has written the value of database item X.
3) Records that transaction T has deleted the value of database item X.
4) Records that transaction T has updated the value of database item X.

Answer 1

There are four types of log records in a database: read, write, delete, and update.

Step-by-step explanation:

There are different types of log records in a database:

1. Records that a transaction has read the value of a database item.
2. Records that a transaction has written the value of a database item.
3. Records that a transaction has deleted the value of a database item.
4. Records that a transaction has updated the value of a database item.