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Information that your applications will be presenting to the end user—such as page content, menu items, and error messages—will not always be static. Dynamic data will need to be stored and retrieved from a persistent storage mechanism such as a relational database. There are things you should be aware of that might not be directly evident when setting up your application's data storage, or when operating with this data.
Localization support will vary depending on your database vendor. Typically, you will be interested in knowing which character encodings are supported by your database, as this will affect the type of data that you can store in the database. This setting is usually something that needs to be configured at the database level or upon the creation of tables in a particular database.