How to implement Mysql transaction isolation

This article mainly introduces the relevant knowledge of how to achieve Mysql transaction isolation, the content is detailed and easy to understand, the operation is simple and fast, and it has a certain reference value. I believe you will gain something after reading this article on how to achieve Mysql transaction isolation. Let's take a look.

1. Each record will record a rollback operation when it is updated.

2. There can be multiple versions of the same record in the system, which is the multi-version concurrency control (MVCC) of the database.

3. At the level of read submitted, the latest snapshot of the current data will be obtained through MVCC.

Example

1. Select count (1) from user where age=20;-- return 0: currently there is no 2. Update user set name=test where age=20;-- Affects 10 rows of age=20: because transaction B has just written 10 age=20 records, and the write operation is not affected by MVCC, you can see the latest data, so the update is successful. Once the operation is successful, the data being operated will be visible to the current transaction. Select count (1) from user where age=20 -- return 10: this is the end of the article on "how to achieve Mysql transaction isolation". Thank you for reading! I believe you all have a certain understanding of the knowledge of "how to achieve Mysql transaction isolation". If you want to learn more, you are welcome to follow the industry information channel.