Transaction: A transaction is a small set of changes which must be made to the database . The transaction done to the database may or may not affect the changes to the content of the database. The execution takes place as a single unit. Locks: Resource locking is a technique which prevents the concurrent processing problems and it blocks the sharing of resources or data by locking the resources or data. Locks can be invoked in two basic styles: Optimistic locking Pessimistic locking

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Chapter 6, Problem 6.18RQ

Program Plan Intro

Transaction:

A transaction is a small set of changes which must be made to the database. The transaction done to the database may or may not affect the changes to the content of the database. The execution takes place as a single unit.

Locks:

Resource locking is a technique which prevents the concurrent processing problems and it blocks the sharing of resources or data by locking the resources or data.

Locks can be invoked in two basic styles:

Optimistic locking

Pessimistic locking

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