SQL Server Part6- (Advance Level)
SQL Server Common table expression in full detail including recursive .
SQL Server Part6- (Advance Level) free download
SQL Server Common table expression in full detail including recursive .
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
