What are the four isolation levels of MySQL transactions?

9 months ago

Benjamin Taylor

1 minute

The four isolation levels of MySQL transactions are:

Read Uncommitted: Modifications in a transaction are visible to other transactions, allowing a transaction to see changes that have not been committed by other transactions.

Read Committed: A transaction can only see modifications made by other transactions that have been committed; modifications that are not committed are not visible to other transactions.
Repeatable Read: A transaction sees data consistently throughout the execution process, even if other transactions have made changes to the data, the transaction will not alter the data it sees.
Serialization: The highest level of isolation ensures that the data reading and writing operations between transactions are completely independent, avoiding concurrency issues, but may lead to performance problems.