Which database has better support for transactions: Postgresql or MySQL?

PostgreSQL and MySQL are two popular open-source relational database management systems. Both databases support transactions, but PostgreSQL has a more robust and feature-rich implementation of transaction support compared to MySQL.

PostgreSQL is known for its strong emphasis on data integrity and reliability. It has a high level of concurrency control and transaction support, including support for ACID transactions. PostgreSQL also supports nested transactions, which MySQL does not. Furthermore, PostgreSQL has better support for isolation levels, which is important for applications that require a high level of transactional consistency.

On the other hand, MySQL has historically focused more on performance and scalability, and has a simpler implementation of transactions. However, in recent years MySQL has improved its transaction support with the introduction of the InnoDB storage engine. InnoDB provides support for ACID transactions, row-level locking, and multi-version concurrency control.