General DB lets you store and update your databases on your mobile device. You can import CSV files, or download entire SQLite databases, or execute SQL files.
Private DB is a similar app but designed for those who don't need to add, edit, or delete rows. It is ideal for distributing large datasets in tabular form.
Click a link below to watch some How-To videos on an iPhone. The iPad version functions similarly but has been customized for its larger screen.