# IFC for relational databases - ifcSQL

**URL:** https://forums.buildingsmart.org/t/ifc-for-relational-databases-ifcsql/1524
**Category:** Serializations
**Created:** [June 20, 2019, 2:09pm UTC](https://forums.buildingsmart.org/t/ifc-for-relational-databases-ifcsql/1524 "2019-06-20T14:09:31Z")
**Posts on this page:** 1
**Showing post:** 10

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### Author: ![ReD\_CoDE](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.buildingsmart.org/red_code/32/226_2.png) [@ReD\_CoDE](https://forums.buildingsmart.org/u/ReD_CoDE)
#### Post date: [June 26, 2019, 8:45am UTC](https://forums.buildingsmart.org/t/ifc-for-relational-databases-ifcsql/1524/10 "2019-06-26T08:45:16Z")

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Maybe I’m wrong, but as I know No-SQL doesn’t have a good performance like SQL (but for sure maybe a mixed approach SQL + No-SQL be good, maybe)

It seems that Esri uses a relational approach and this document explains relationships, especially “Relationship Class - Navigation Property” which I think would be useful

[http://resources.esri.com/help/9.3/arcgisengine/dotnet/2e097482-4f99-4224-896e-8027e6ab883e.htm](http://resources.esri.com/help/9.3/arcgisengine/dotnet/2e097482-4f99-4224-896e-8027e6ab883e.htm)

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