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I have been searching for some sort of library that can create, query, and insert data into a SQLite style database from an Arduino to an SD card.

I have looked at the Arduino Extended Database library. But I don’t think it will quite fill this role.

I don’t need all the features of sql. But a simple query system would go a long way.

Does anyone know of a library like this?

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    RDBMS generally take lots of memory - the Arduino doesn't have lots of memory, so anything you implemented would be horrendously slow. Better is to use a fixed-format binary record based system. Record location = record size * record number.
    – Majenko
    Commented Oct 15, 2017 at 11:00
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    can you use wifi to push the data to a "real db"?
    – dandavis
    Commented Oct 15, 2017 at 13:47
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    I agree with the two above, if you are looking for a DB on an Arduino you have the wrong hardware solution. If Wifi is not an option could you use Serial or I2C to connect to a Pi and use the PI as a database server? Another option might be an ESP32, but I don't know if there are any DB libraries out there for it. Commented Oct 16, 2017 at 14:34
  • Alright, no worries. This is good to know. At least I know why this doesn't exist. It's mostly memory constraints. Thanks for the advice!
    – Aaron
    Commented Oct 17, 2017 at 15:15

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