A hands-on tutorial of SQLite3: 
Applications very often save data. Whether your users create simple text documents, complex graphic layouts, game progress, or an intricate list of customers and order numbers, software usually implies that data is being generated. There are many ways to store data for repeated use. You can dump text to configuration formats such as INI, YAML, XML, or JSON, you can write out raw binary data, or you can store data in a structured database.
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