What are SQL deadlocks and how can I resolve them?

What are SQL deadlocks and how can I resolve them?

SQL deadlocks occur when two or more transactions block each other, preventing them from completing. To resolve them, you can use techniques like setting timeouts, using a deadlock detection algorithm, or optimizing your queries.

Can you give me an example of a deadlock situation?

Sure! Imagine Transaction A locks Table 1 and needs to lock Table 2, while Transaction B locks Table 2 and needs Table 1. They are now in a deadlock.

How can I prevent deadlocks in my SQL database?

To prevent deadlocks, you can ensure that transactions acquire locks in a consistent order, keep transactions short, and avoid user interaction during transactions.

What tools can help me monitor deadlocks?

You can use database monitoring tools like SQL Server Profiler, Oracle Enterprise Manager, or third-party tools like Redgate SQL Monitor to track and analyze deadlocks.