Handwritten notes of SQL

The document is a collection of handwritten notes on SQL, covering fundamental and advanced topics related to databases and Structured Query Language (SQL). It includes explanations, examples, and possibly diagrams illustrating key SQL concepts such as queries, commands, syntax, clauses, and functions. The notes detail essential SQL operations like SELECT, INSERT, UPDATE, DELETE, and JOINs, as well as advanced topics such as subqueries, window functions, transactions, and indexing. The document may also discuss database normalization, ACID properties, security concerns like SQL injection, and best practices for optimization. Since it is handwritten, it likely provides a personalized, structured approach to learning SQL, making it useful for students, developers, or database administrators looking for a reference guide in a manual, easy-to-read format.