Data cleaning, also known as data cleansing or data scrubbing, is the process of identifying and correcting or removing errors, inconsistencies, and inaccuracies in datasets. SQL (Structured Query Language) is a widely used programming language for managing and manipulating relational databases. In this project, I cleaned the dvdrental database after loading into postgresql. After cleaning, I answered some questions. Pls find below screenshorts to the different query I used to answer each questions.