3 ms·
https://en.wikipedia.org/wiki/Hierarchical_database_model https://en.wikipedia.org/wiki/Hierarchical_database_model This was pretty common on mainframes, befor
by coolgeek 6y ago
https://en.wikipedia.org/wiki/Hierarchical_database_model https://en.wikipedia.org/wiki/Hierarchical_database_model
This was pretty common on mainframes, before db2 and other SQL databases