リレーショナルDBMS でぃうびいえむえすではありませんでした
rirēshonarudiubiiemuesudewārimasendeshita

Noun
Desu Copula

The polite, past negative form of リレーショナルDBMS

1. Was not a relational DBMS.; It was not a relational DBMS.

Past/Perfective
Negative
Polite
Formal Register
Computing