Master SQL: Navigating Joins and Windows Functions

When retrieving data from a database, there are specific conditions or criteria you may want to use to analyze that data. You might need to perform calculations, filter out relevant information, group data for specific analysis, or display aggregated results. SQL allows you to perform these operations on single or multiple tables by use of built-in functions. This article focuses on Joins and Window Functions. JOINS Joins are used in querying related data that is stored in multiple tables. The tables, though different and containing specific parts of information, are related by having a common matching column that is used to relate them together. For instance, if you have data in a students table with the fields: name, student_id, residency, year, and a fee table with the fields: student_id, fee_paid, balance, you can relate the two using the student_id as a common field between the two. Different types of joins can be used in SQL, namely: Inner Join: This retrieves data from the datab