If you are a software developer, I believe you must know or even have used an extremely light-weighted database — SQLite. It has almost all the features you need as a relational database, but everything is saved in a single file. In the official site, here are some scenarios that you could use SQLite.

• Embedded devices and IoT
• Data Analysis
• Data Transferring
• File archive and/or data container
• Internal or temporary databases
• Stand-in for an enterprise database during demos or testing
• Education, training and testing
• Experimental SQL language extensions

There are more reasons that you may want to use SQLite, please check out the documentation.

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