The database capabilities of Excel are very powerful. In fact, not only can Excel be used to create a simple searchable database, it also can be used to create a proper relational database.

If you're looking to keep track of data on your Android device, PortoDB might be exactly what you need. Here's how to install and use this mobile database.

How to Create and Use a Database With Linux Tools In this example, you'll build a simple database for a todo app. You can build all the basic functionality using standard Linux tools.