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Database - Interview Questions and Answers for 'Bny mellon' - 1 question(s) found - Order By Newest

 Q1. What is the purpose of Commit and Rollback in Databases ?Database2016-07-14 14:28:55

Ans. When a DML is executed, the changes only stays in session and still not pushed to DB Tables, Commit is used to push those changes to the Tables.

In case we realize that we don't want to commit those changes and would like to ignore them, we can use rollback.

For example - You may like that for a banking transaction you would like to update the account balance only if the debit or credit record was correctly inserted, so you may like to encapsulate both DML's - insert for transaction and update for balance in a single transaction and would only commit if both succeeds else rollback.

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   Like      Discuss      Correct / Improve     databases  commit  rollback     Amdocs  The Bank of New York Mellon (BNY Mellon)      Basic


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