MySQL isolation levels and how they work

This post details the fundamental concepts of ACID compliance, with a specific focus on the 'Isolation' property and how MySQL implements it through isolation levels. It explains the three main isolation violations (dirty reads, non-repeatable reads, phantom reads) with clear examples and diagrams using a music store analogy. The article also elaborates on the role of shared and exclusive locks, and introduces gap locking as a mechanism to prevent phantom reads. While the post discusses general MySQL transaction behavior, it aligns with PlanetScale's commitment to providing reliable database transactions, especially in the context of its managed MySQL offerings.