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Docs(mysql-questions-01.md) fix typos #2083

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Snailclimb merged 1 commit into from
Jul 20, 2023
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Docs(mysql-questions-01.md) fix typos #2083

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2 changes: 1 addition & 1 deletion docs/database/mysql/mysql-questions-01.md
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Expand Up @@ -452,7 +452,7 @@ COMMIT;

一个事务读取数据并且对数据进行了修改，这个修改对其他事务来说是可见的，即使当前事务没有提交。这时另外一个事务读取了这个还未提交的数据，但第一个事务突然回滚，导致数据并没有被提交到数据库，那第二个事务读取到的就是脏数据，这也就是脏读的由来。

例如：事务 1 读取某表中的数据 A=20，事务 1 修改 A=A-1，事务 2 读取到 A = 19,事务 1 回滚导致对 A 的修改并为提交到数据库， A 的值还是 20。
例如：事务 1 读取某表中的数据 A=20，事务 1 修改 A=A-1，事务 2 读取到 A = 19,事务 1 回滚导致对 A 的修改并未提交到数据库， A 的值还是 20。

![脏读](./images/concurrency-consistency-issues-dirty-reading.png)

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