Joins in PostgreSQL Using DBeaver

Suppose you manage a small retail store. The store has multiple departments i.e Electronics, Clothing, and Groceries. Each department has employees assigned to it. And those employees generate sales. Now you want to evaluate performance. You might ask: Which employee belongs to which department? How much revenue has each employee generated? Are there employees who have not recorded any sales? At this point, the data you need is not stored in a single table. It is distributed across several related tables. That is how relational databases are designed. Data is separated logically to reduce redundancy and maintain consistency. To demonstrate how this data can be combined meaningfully, I will use PostgreSQL as the database management system. I am connecting to a locally installed PostgreSQL server using DBeaver , which serves as the SQL client for writing and executing queries. In this article, I will walk through the process step by step: Table of Contents 1. Creating a Database and Sche