6. JOINS
Overview
This chapter will help you understand the functionality of the various joins and their implementation through examples. By the end of this chapter, you will be able to implement an INNER JOIN
to retrieve overlapping data within multiple tables and write LEFT
and RIGHT JOIN
queries to filter the results that have been obtained from multiple tables. We will also be able to implement a CROSS JOIN
to obtain a cartesian product of the table elements; and combine two queries using UNION
.