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Dear learner, If you have watched Part5 ,then you are ready to take your SQL to a new level. We are discussing here Common table expressions which are adorable, easy and make complex task very very easy. Introduction to Common Table Expressions - what they are and why they are used and how we need to break the scenarios into seperate sections.Why we need them and are they same as derived tables. Syntax and structure of a basic CTE using the WITH clause How CTEs differ from subqueries, temporary tables, and views Real-world use cases where CTEs simplify complex queries Writing simple CTEs to filter and transform data Using multiple CTEs in a single query - comma-separated definitions How to use CTEs in SELECT, INSERT, UPDATE, and DELETE operations Performance tips and when not to use CTEs Understanding recursion and why it's needed in data structures like hierarchies Building recursive CTEs with an anchor query and recursive part Using OPTION (MAXRECURSION) to control recursion limits Solving practical problems like manager-employee hierarchies using recursive CTEs How to join CTEs with other tables and filter results effectively Nesting and reusing CTEs for better query organization Hands-on exercises with interview-style questions based on CTE logic

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