Aren't you conflating the lexicon of data management with specific implementations of a relational database management system (RDBMS)? Sorry, but your response

Aren't you conflating the lexicon of data management with specific implementations of a relational database management system (RDBMS)? Sorry, but your response sounds snarky and reminds me of all the ego hurdles I had to overcome when leaving/loving databases and set theory. Please remember that your comment could be someone's first introduction or step early step in learning.