Elevate Your SQL Expertise
In today's competitive job market, having a strong foundation in SQL is crucial for jobs in data engineering and analytics. Whether you are looking to land a job in a prestigious tech organization, mastering complex queries or sharpening your SQL skills.
Dive into this efficient guide aimed at:
Preparing for data engineering and data analytics job interviews for top tier tech organisations.
Enhancing your SQL query writing skills to advance your career in your current role.
Best suited for intermediate SQL learners. This program is designed to be completed in approximately 2-3 weeks, dedicating an hour each day and will provide you with the knowledge and tools needed to confidently tackle technical interviews, showcasing your expertise in SQL.
Core Topics Covered:
Deepening understanding of Joins and Subqueries.
Effective use of Group By and Having Clauses.
Exploring Common Table Expressions (CTEs).
Techniques in Create Table as Select (CTAS).
Focus on Analytics:
Proficiency in Window Functions.
Advanced Grouping Techniques: Grouping Sets, Rollup, Cube.
(Optional) Recursive Queries - Essential for Big Tech interviews, this advanced topic is easier with a background in programming recursion. Its practical use in projects may be limited.
Practice Sequence:
Day 1-4: Revisit the essentials: Top 50 SQL LeetCode Study Plan.
Day 5: Learn CTAS through hands-on examples: Snowflake's CTAS Guide.
Day 6-9: Gain insights into basic and analytical window functions: Window Functions Introduction.
Day 9-17: Enhance skills with advanced window functions (available through a paid LeetCode plan): LeetCode's Advanced SQL Practice. This step is particularly beneficial for a Senior Data Engineer/Analyst role, especially in big tech companies, where such advanced SQL skills are highly valued.
Day 18-20: Using GROUP BY with ROLLUP, CUBE, and GROUPING SETS
(Optional) Explore Recursive Queries: PostgreSQL Recursive Query Guide.
By following this plan, you can expect to sharpen your SQL skills, master complex queries, and effectively analyse large datasets. With detailed guides and scenario based practice questions, you will build the confidence needed to tackle any data-related challenge.
We hope this program will be a valuable asset in your journey to excel in SQL. Good luck!