Master data engineering interviews with 200 questions on Window Functions, CTEs, Query Optimization, and Normalization.
Sub Category
- Database Design & Development
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Objectives
- Write complex, high-performance analytical queries using Window Functions (RANK, DENSE_RANK, ROW_NUMBER) and Common Table Expressions (CTEs).
- Architect highly efficient relational databases by mastering the rules of Normalization (1NF, 2NF, 3NF) to eliminate data redundancy.
- Optimize slow-running queries by understanding how the database engine utilizes B-Tree indexes, and when to avoid Correlated Subqueries.
- Manage concurrent data modifications securely by applying ACID properties (Atomicity, Consistency, Isolation, Durability) and Transaction Controls (COMMIT, ROLL
Pre Requisites
- A firm grasp of basic SQL commands. You should already know how to write simple SELECT, INSERT, UPDATE, and DELETE statements, and understand the basic concept of a JOIN before tackling these advanced scenarios.
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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