Please only take this question if you are fluent in SQL Serv

Please only take this question if you are fluent in SQL Server.

What is the purpose of a JOIN?

A. To include query results from two tables which have no fields in common.

B. This is a trick question because there is no such thing as a \"JOIN\" in SQL.

C. To include query results from two tables which have identical index setups.

D. To include query results from two tables which have a least one field that is related.

E. To include query results from two tables which have similar table structures.

Solution

Okay so in SQL we use JOIN.

It combines columns from one or more tables in a relational database. It creates a set that can be saved as a table or used as it is. A JOIN is a means for combining columns from one (self-table) or more tables by using values common to each.

So according to the question we can say that it\'s purpose is to include query results from two tables which have a least one field that is related.

We can also add here that Join Combines only the tables having atleast 1 Coloumns Similar.

Types of JOIN:-

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