By the end of this project, you will be able to professionally write queries with better performance using some techniques and improve the performance of queries and make the execution time faster. It provides you with the important steps to tune your queries. database tuning is essential to easily organizing and accessing database data by creating different types of indexes to improve performance. and in applying the hash, nest loop joins and merge join strategies. You will also be able to create tables and insert data. And You will be able to execute queries using Explain and Explain Analyze. This guided project is for people in the field of data and data engineering. people who want to learn how to improve the performance of queries and make the execution time faster. It provides you with the important steps to tune your queries.