To correct account balances in a banking system, which transaction control command ensures accuracy and consistency?

To correct account balances in a banking system, which transaction control command ensures accuracy and consistency?

• A. ROLLBACK
• B. COMMIT
• C. SAVEPOINT
• D. SET TRANSACTION

Answer: (B)

In a banking system, maintaining accuracy and consistency of account balances is critical, especially when multiple transactions occur concurrently. The transaction control command that ensures this integrity is the COMMIT command. When a COMMIT command is executed, it finalizes all the changes made during the current transaction and makes them permanent in the database. This means that all modifications to account balances and other relevant data are saved and become visible to all users. COMMIT ensures that either all operations in the transaction are applied, or none are if an issue arises. This aligns perfectly with the need for accuracy and consistency in financial data, ensuring that the database reflects the correct state of account information after successful operations. The ROLLBACK command, while essential for undoing changes if an error occurs, does not contribute to ensuring accuracy during normal operations. Instead, it is used to revert the database to its last consistent state. The SAVEPOINT command allows you to set a temporary point within a transaction that you can roll back to, but it does not finalize transactions nor ensure the integrity of the entire transaction. The SET TRANSACTION command is used to specify the properties of the current transaction, such as isolation level, but again, does not complete the transaction or ensure accuracy at its conclusion. Overall

In a banking system, maintaining accuracy and consistency of account balances is critical, especially when multiple transactions occur concurrently. The transaction control command that ensures this integrity is the COMMIT command.

When a COMMIT command is executed, it finalizes all the changes made during the current transaction and makes them permanent in the database. This means that all modifications to account balances and other relevant data are saved and become visible to all users. COMMIT ensures that either all operations in the transaction are applied, or none are if an issue arises. This aligns perfectly with the need for accuracy and consistency in financial data, ensuring that the database reflects the correct state of account information after successful operations.

The ROLLBACK command, while essential for undoing changes if an error occurs, does not contribute to ensuring accuracy during normal operations. Instead, it is used to revert the database to its last consistent state. The SAVEPOINT command allows you to set a temporary point within a transaction that you can roll back to, but it does not finalize transactions nor ensure the integrity of the entire transaction. The SET TRANSACTION command is used to specify the properties of the current transaction, such as isolation level, but again, does not complete the transaction or ensure accuracy at its conclusion.

Overall