它仅基于 7 个基本命令： Migrate、 Clean、 Info、 Validate、 Undo、 Baseline和 Repair。
Flyway是一个版本控制应用程序，可以在所有实例中轻松可靠地演变数据库模式。要了解有关Flyway的更多信息，可以使用链接 - www.flywaydb.org[1]
当我们的应用升级时往往会伴随着数据库表结构的升级，此时就需要迁移数据库的表结构。一般我们会使用工具或者脚本来实现，手动操作毕竟有一定风险，要是能在应用启动时自动升级数据库表结构就好了！Flyway正是这么一款工具，通过Flyway和SpringBoot结合使用，在应用启动时就可以自动升级数据库表结构，非常方便，推荐给大家！
之前已经介绍了很多在Spring Boot中使用MySQL的案例，包含了Spring Boot最原始的 JdbcTemplate（https://blog.didispace.com/spring-boot-learning-21-3-1/）、Spring Data JPA（https://blog.didispace.com/spring-boot-learning-21-3-4/）以及我们国内最常用的MyBatis。同时，对于一些复杂场景比如：更换Druid数据源，或是多数据源的情况也都做了介绍。 不论
在我们的认知中，我们会使用 SVN 或 Git 进行代码的版本管理。但是，我们是否好奇过，数据库也是需要进行版本管理的呢？
在进行版本升级时，Sql不兼容，数据库升级经常报错，需要重复对比哪里执行过了。这种问题如何解决？
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