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|Database - Interview Questions and Answers for 'Bny mellon' - 1 question(s) found - Order By Newest|
|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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|Write an SQL to find all records having all upper case alphanumeric characters in a field ?|