What are the advantages and disadvantages of using transactions to ensure consistent changes in a database?

Transactions in a database ensure atomicity, consistency, isolation, and durability (ACID), guaranteeing that changes are either fully applied or not applied at all.

Advantages:

• Ensure data integrity during complex operations.
• Allow rollback of changes in case of errors, preventing partially completed operations.
• Provide isolation, which is important in concurrent access.

Disadvantages:

• Can reduce performance due to locking and overhead.
• Complexity of implementing and managing transactions in distributed systems.
• Deadlocks may occur if used improperly.

In Go, transactions are usually implemented through the Begin(), Commit(), and Rollback() methods from the database/sql package.