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How does mysql implement custom database isolation levels?

WBOY
WBOYOriginal
2016-09-13 08:45:501494browse

mysql isolation level database

The isolation level can be customized in mysql in the following way, so how are data processed between transactions with different isolation levels? It can feel chaotic.

<code> SET [GLOBAL | SESSION] TRANSACTION ISOLATION LEVEL        {             READ UNCOMMITTED           | READ COMMITTED           | REPEATABLE READ           | SERIALIZABLE         }  </code>
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