Question

A relationship is most similar to which type of join?

a) Inner join
b) Left join
c) Outer join
d) Cross join

Answer 1

The most similar type of join to a relationship is an inner join. It returns only the matching records from both tables involved in the join, based on a specified condition.

Step-by-step explanation:

The most similar type of join to a relationship is the inner join. An inner join returns only the matching records from both tables involved in the join, based on a specified condition. This type of join is used when you want to retrieve only the related records.

For example, let's say we have two tables - 'Students' and 'Grades'. If we want to retrieve the information about students who have scored marks in both subjects, we can use an inner join on the common column 'student_id'.

An inner join selects records that have matching values in both tables and excludes the unmatched records. This is similar to a relationship where you focus on the connections between two entities and only consider the related information.