Question

What is the functionality of natural join in inner join?

1) Natural join works only if the tables that you are joining have the same column names and it will try matching the columns with the same name and return matching results just like equie join
2) Natural join works only if the tables that you are joining have different column names and it will try matching the columns with the same name and return matching results just like equie join
3) Natural join works only if the tables that you are joining have the same column names and it will try matching the columns with the same name and return all the results from both tables
4) Natural join works only if the tables that you are joining have different column names and it will try matching the columns with the same name and return all the results from both tables

Answer 1

A natural join is a type of inner join in SQL that combines rows from two or more tables based on matching column names that appear in both tables, producing results similar to an equi join.

Step-by-step explanation:

The functionality of a natural join in SQL, which is a type of inner join, is to combine rows from two or more tables based on column names that appear in both tables. Specifically, option 1 is correct: a natural join works only if the tables that you are joining have the same column names and it will try matching the columns with the same name and return matching results just like an equi join. It automatically joins the tables using all columns with the same names and eliminates duplicate columns from the output.