Discussion
Which of the following commands is used to save any transaction permanently into the database ?
Answer: B
The command is Commit.
COMMIT ends a transaction and makes all its changes permanent in the database; after it, the changes survive failures and are visible to other transactions.
ROLLBACK does the opposite, undoing the changes of the current transaction. Redo and undo are recovery operations the DBMS performs from its log, not commands for saving a transaction.
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