What are the different isolation levels in Sequelize?

What are the different isolation levels in Sequelize?

Sequelize supports several isolation levels: READ UNCOMMITTED, READ COMMITTED, REPEATABLE READ, and SERIALIZABLE. Each level controls how transactions interact with each other.

Can you explain what each isolation level means?

Sure!

• READ UNCOMMITTED: Allows dirty reads, meaning transactions can see uncommitted changes from others.
• READ COMMITTED: Prevents dirty reads; transactions only see committed changes.
• REPEATABLE READ: Ensures that if a transaction reads a row, it will see the same data if it reads it again, preventing non-repeatable reads.
• SERIALIZABLE: The strictest level, it ensures complete isolation from other transactions, effectively serializing them.

Which isolation level should I use for my application?

It depends on your application's needs. If you need high performance and can tolerate dirty reads, use READ UNCOMMITTED. For most applications, READ COMMITTED is a good balance. If data consistency is critical, consider REPEATABLE READ or SERIALIZABLE.