Plessy vs. Ferguson was the case that ruled that segregation laws were acceptable specifically the public facilities under the Separate but Equal doctrine. It was later overturned through court decisions and legislation.
Plessy v. Ferguson (1896) was a landmark decision of the United States Supreme Court. The decision held that racial segregation laws in public facilities were constitutional as long as those facilities were equal in quality. Although it did not use the phrase, the doctrine came to be known as "separate but equal." The decision is regarded as one of the worst ones in history, and it is now considered <em>de facto</em> overruled.
The correct term to answer your question is Relational Database.
Explanation:
A relational database is a database specifically structured to recognize relations between stored items information and can be joined through common fields and the data can be easily stored in tables.