# relational calculus

> theory of relational databases

**Wikidata**: [Q1722436](https://www.wikidata.org/wiki/Q1722436)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Relational_calculus)  
**Source**: https://4ort.xyz/entity/relational-calculus


## References

1. Freebase Data Dumps. 2013
2. Quora
3. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)