MVCC 中文名称叫多版本并发控制，是InnoDB 引擎为了提高执行事务的并发效率引入的概念。多版本的含义就是一条数据被多个事务修改后，在事务还没有被提交前，存在多个版本。MVCC 的实现机制就是通过版本链把多个版本连接起来。 大家好，我是君哥。

You can create a release to package software, along with release notes and links to binary files, for other people to use. Learn more about releases in our docs.

In accordance with the 1998 Jeanne Clery Disclosure of Campus Security Policy and Campus Crime Statistics Act (Clery Act), the Purdue University Police Department (PUPD) maintains a daily crime log.

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Because of incorrect information from Getty Images, a previous photo caption misidentified the Smithsonian Arts and Industries Building as the Smithsonian Castle.