Rails and Databases

The examples in this book were written using SQLite 3 (version 3.7.4 or thereabouts). If you want to follow along with our code, it’s probably simplest if you use SQLite 3 as well. If you decide to use something else, it won’t be a major problem. You may have to make minor adjustments to any explicit SQL in our code, but Rails pretty much eliminates database-specific SQL from applications.

If you want to connect to a database other than SQLite 3, Rails also works with DB2, MySQL, Oracle Database, Postgres, Firebird, and SQL Server. For all but SQLite 3, you’ll need to install a database driver—a library that Rails can use to connect to and use with your database engine. This section contains links to instructions to get ...

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