In an E-R diagram, a(n)________ on a line means that at least one entity of that type is required.
A)small oval
B)vertical bar
C)arrow
D)triangular block

Question

Quizplus · Accepted Answer

A vertical bar on a line in an E-R diagram indicates a mandatory relationship between entities, meaning that at least one entity of that type is required. The other symbols listed (small oval, arrow, triangular block) do not indicate mandatory relationships.

In an E-R Diagram, A(n)________ on a Line Means That