Validate your SQL skills with 200 unique practice questions on Window Functions, CTEs, Joins, and query optimization.
Sub Category
- Operating Systems & Servers
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Objectives
- Write complex, high-performance SQL queries using Common Table Expressions (CTEs) and Correlated Subqueries.
- Master advanced analytical functions, including Window Functions (ROW_NUMBER, RANK) to calculate running totals and moving averages.
- Optimize relational database queries in MySQL by utilizing proper indexing, execution plan analysis, and efficient Joins.
- Clean and prepare messy datasets using String manipulation, Date/Time functions, and COALESCE for NULL handling.
Pre Requisites
- A foundational understanding of basic SQL commands (SELECT, FROM, WHERE). This course is designed to test intermediate to advanced analytical querying, not basic database creation.
FAQ
- Q. How long do I have access to the course materials?
- A. You can view and review the lecture materials indefinitely, like an on-demand channel.
- Q. Can I take my courses with me wherever I go?
- A. Definitely! If you have an internet connection, courses on Udemy are available on any device at any time. If you don't have an internet connection, some instructors also let their students download course lectures. That's up to the instructor though, so make sure you get on their good side!
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