DigiNews

Summary

The article explains what database transactions are, including begin/commit/rollback, and how they ensure atomicity and isolation. It compares PostgreSQL's multi-versioning with MySQL's undo log to illustrate different approaches to consistent reads, discusses isolation levels (Serializable, Repeatable Read, Read Committed, Read Uncommitted) and phenomena like phantom reads, non-repeatable reads, and dirty reads, and covers concepts of locking and concurrency.