What are the different types of SQL locking?

What are the different types of SQL locking?

SQL locking types primarily include optimistic locking, pessimistic locking, and row-level locking. Would you like to know more about each?

Yes, please explain optimistic and pessimistic locking.

Optimistic locking assumes that multiple transactions can complete without affecting each other. It checks for conflicts before committing. Pessimistic locking, on the other hand, locks the data as soon as it's read, preventing other transactions from accessing it until the lock is released.

When should I use each type of locking?

Use optimistic locking when conflicts are rare and performance is a priority. Pessimistic locking is better when conflicts are frequent or when data integrity is critical.

Can you give an example of a situation for each type?

Sure! For optimistic locking, consider a web application where users rarely edit the same record simultaneously. For pessimistic locking, think of a banking system where multiple transactions might try to update the same account balance.