How do you handle deadlocks in SQL transactions?
Deadlocks occur when two or more transactions are waiting for each other to release locks,
causing a cycle of dependencies. To handle deadlocks:
- Deadlock Detection: DBMS systems (e.g., SQL Server) can automatically detect
deadlocks and terminate one of the transactions to break the deadlock.
- Retry Logic: If a deadlock is detected, you can implement a retry mechanism in your
application to reattempt the transaction after a short delay.
- Optimize Transactions: Keep transactions short and ensure that they acquire locks
in the same order to reduce the likelihood of deadlocks.