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Course Description
This advanced SQL course is designed for users who are ready to move beyond the basics and tackle more complex queries. Participants will learn to write advanced SELECT statements with refined filtering, perform a variety of joins (including outer, self, and cross joins), and master subqueries for dynamic data retrieval.
The course also covers set operations (UNION, INTERSECT, EXCEPT) and advanced aggregation techniques using GROUP BY, CASE, and powerful window functions like ROW_NUMBER() and RANK(). Through hands-on exercises, learners will develop the skills to build efficient, scalable, and insightful queries for real-world data analysis.
Course Objectives
- Write Advanced SQL SELECT Statements with Complex Filtering and Deduplication Techniques
- Perform Complex Joins Including Outer, Self, and Cross Joins to Retrieve Related Data
- Use Subqueries in Various Clauses to Support Nested and Correlated Data Retrieval
- Apply SQL Set Operations to Combine and Compare Query Results Effectively
- Implement Advanced Aggregation, Grouping, and Window Functions for Analytical Queries
Course Outline
Lesson 1: Advanced SQL SELECT Statement
- Using DISTINCT to eliminate duplicates
- Advanced filtering with LIKE, IN, and BETWEEN operators
- Combining conditions with AND/OR
Lesson 2: Advanced Joins
- LEFT JOIN, RIGHT JOIN, FULL OUTER JOIN
- Self Joins and Cross Joins
Lesson 3: Subqueries
- Using subqueries in SELECT, WHERE, and FROM clauses
- Correlated subqueries vs. non-correlated subqueries
- Nested queries for complex data retrieval Lesson
4: Set Operations
- UNION, UNION ALL, INTERSECT, EXCEPT
- When to use each set operation
Lesson 5: Advanced Aggregation and Grouping
- GROUP BY with multiple columns
- Using CASE statements for conditional aggregation
- Window Functions (ROW_NUMBER(), RANK(), DENSE_RANK())