Technically, not a relation but a query, but that is known as a UNION.
In a Relational Database or a Flat Database a table contains an organized collection of records, each of which contains several fields of data describing the item that the record represents.In other types of databases tables may or may not exist.
I suppose that a relation doesn't exist.
No such records exist.
No records exist.
A vast number of kinds of tables actually exist. The type of tables used at the ITSF world championships are Bonzini, Fireball, Roberto Sport, Garlando, and Leonhart.
That it, and we, exist.
No records exist.
There are no records of this. And it will be wrong for me to claim what does not exist.
No records exist.
No records exist
No accurate records exist.
No accurate records exist.