Welcome to the SQL folder! This is an extensive collection of important topics in Structured Query Language (SQL) that can be a valuable resource for learners at all levels.

The topics covered in this folder include but are not limited to: • Basic SQL queries (SELECT, FROM, WHERE, etc.) • Sorting and filtering data • Aggregation functions (COUNT, SUM, AVG, etc.) • Grouping and grouping functions (GROUP BY, HAVING, etc.) • Joins (INNER JOIN, LEFT JOIN, RIGHT JOIN, etc.) • Subqueries • Set operators (UNION, INTERSECT, EXCEPT) • Stored procedures • Transactions • Indexes • Constraints (PRIMARY KEY, FOREIGN KEY, CHECK, UNIQUE) • Views • Normalization Each topic is presented in a clear and concise manner, with examples and exercises to reinforce your understanding. This folder also includes resources such as cheat sheets, formula sheets, and SQL software tutorials to assist you in your database management and analysis. The goal of this folder is to provide you with a comprehensive understanding of SQL that can be applied to various fields such as data science, business intelligence, web development, and more. We hope you find this folder useful and welcome any feedback or suggestions for improvement.