Update README.md

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GowthamRaj K
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@@ -110,3 +110,13 @@ These components are
- Takes back privileges granted from user.
# TCL - Transaction Control Language 😀
### COMMIT
- Save all the transactions to the database.
### ROLLBACK
- Undo transactions that have not already been saved to the database.
### SAVEPOINT
- Roll the transaction back to a certain point without rolling back the entire transaction.