<s>[INST] I am in the process of creating a back-end interface for multiple micro-controllers to communicate data to each other. When one sends a request, it creates a group. The others are notified and can join the group as well. What would be the best architecture for the database? It needs to keep track of when each group was created, how many micro-controllers joined and when it ended. [/INST] For a back-end interface that handles multiple micro-controllers, a relational database management system (RDBMS) would be the most suitable choice for storing and organizing data. 

Here are some key features of an RDBMS:
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Data is stored in tables: The RDBMS stores data in tables, where each table has a name and consists of rows and columns. 
Each column represents a specific type of data, and each row represents a specific record.
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Tables are related: Tables can be related to each other through the use of keys. 
A key is a column or set of columns that uniquely identifies each row in a table. 
By using keys, tables can be related to each other, allowing data to be organized and accessed in meaningful ways.
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SQL is used to interact with the database: 
Structured Query Language (SQL) is a programming language used to interact with the RDBMS. 
SQL is used to create tables, insert data, retrieve data, and perform other operations on the database.
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ACID properties: An RDBMS is designed to ensure that data is stored and retrieved reliably. 
To do this, the RDBMS follows the ACID properties: Atomicity, Consistency, Isolation, and Durability. 
These properties ensure that transactions are processed reliably and that data is not lost or corrupted.
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Does that help? Let me know if you have any more questions</s>\ <s>[INST] Can you provide a popular relational database and how to set it up for this? [/INST] Relational databases are typically resource-intensive and not commonly run on microcontrollers, which usually have limited processing power and storage capacity. However, there are some lightweight databases that can run on microcontrollers with constrained resources.

LittleD is a relational database for microprocessor devices, using as little as 1kB of RAM for most queries. This currently has 713 stars on GitHub. The GitHub address is: https://github.com/graemedouglas/LittleD

As setup steps can change frequently, it’s best to refer to the latest documentation in their repository. First view the Readme.md. Currently the latest docs specify to use the make command to build the library and utilities. Look in the LittleD/arduino/sketch.ino for example usage.</s>\ <s>[INST] Can you explain what fan fiction is? [/INST] 