# MapReduce in terms of SQL

I found a great explanation of MapReduce in terms of SQL in [a blog post about Hadoop](https://www.chrisstucchio.com/blog/2013/hadoop_hatred.html) by Chris Stucchio:

> SQL-ish pseudocode:
>
> ```sql
> SELECT G(...) FROM table GROUP BY F(...)
> ```
> [...]
>
> The only thing you are permitted to touch is `F(k,v)` and `G(k,v)`, except of course for performance optimizations (usually not the fun kind!) at intermediate steps. Everything else is fixed.

## Page metadata

URL: <https://dbohdan.com/mapreduce.md>

Published 2015-02-20, updated 2023-11-13.

Tags:

- algorithm
- data
- old blog
- programming
- SQL

Index: [Old blog](/old-blog).