What Is a Data Lock in Oracle

Q

What Is a Data Lock in Oracle?

✍: FYIcenter.com

A

A data lock is logical flag the Oracle server is placed on data objects to give an exclusive right to a transaction. Statements in other transactions needs to respect data locks based on certain rules. Rules on data locks are:

  • SELECT query statements do not create any data locks.
  • INSERT, UPDATE, and DELETE statements create data locks on the affected rows.
  • Data locks are released when the owner transaction ends.

 

⇒Understanding SQL Transaction Management in Oracle

⇒⇒Oracle Database Tutorials

2016-10-17, 226👍, 0💬

General MySQL Oracle SQL Server