In Computer Science, in the field of databases, non-lock concurrency control is a concurrency control method used in relational databases without using locking.
There are several non-lock concurrency control methods, which involve the use of timestamps on transaction to determine transaction priority:
- Optimistic concurrency control
- Timestamp-based concurrency control
 - Validation-based concurrency control
 - Multiversion concurrency control
 
 
See also
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