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"Relationship" to "Relationships" in DBMS / SQL?

Based on the question "Relationship" versus "relations"

What are the definitions of “relationship” and “relationship” in an RDBMS (or database theory)?

Update:
I was somewhat puzzled by the comment on my question:

"is a synonym for a table and thus has a very precise meaning in the terms of a circuit stored in a computer"

Update2:
If I incorrectly answered this question, from the point of view of RDBMS, writing this relation, this is a one-way direction of a singular-dependency-link,
that is, from one table to another, and the relation implies (not necessarily explicitly) more than one channel connection in one direction (from one table to another)?

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3 answers

A RELATION - (http://mathworld.wolfram.com/Relation.html). (, , ) , ( SQL ).

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- . - " ".

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- . , "" , , , () . .

ER (Entity Relationship), , . , , .

, 3 : , , ; , 2 : TaughtBy StudyingIn. TaughtBy , , . StudyingIn , , .

, , , , . SQL , .

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A relation is a table with columns and rows. and also relations - this is the relationship between relations / tables, for example, the employee table has a relationship in the branches, called its relationship between the employee table and the branch table

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Source: https://habr.com/ru/post/1796215/

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