Millist transaktsiooniisolatsiooni tüüpi rakendatakse vaikimisi andmebaasi haldussüsteemis?

En most database management systems (DBMS), including SQL Server, the default transaction isolation level is Read Committed.

This level ensures that a transaction only sees data that has been committed by other transactions, preventing dirty reads. However, non-repeatable reads and phantom reads can still occur.

Example in C# using the ReadCommitted isolation level:

using (var transaction = connection.BeginTransaction(System.Data.IsolationLevel.ReadCommitted))
{
    // database operations
    transaction.Commit();
}