Complete SQL Notes

SQL (Structured Query Language) is a standard programming language used to manage relational databases. It is widely used in data analysis, data management, and data manipulation in various industries such as finance, healthcare, and e-commerce. SQL allows users to retrieve, insert, update, and delete data from databases, as well as create and modify database structures. It is a versatile language that can be used with various database management systems, such as MySQL, Oracle, Microsoft SQL Server, and PostgreSQL. In this article, we will provide a comprehensive guide to SQL, covering the basics of database management, data querying, and data manipulation using SQL.