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In this video, I've explained one of the most commonly asked SQL interview questions at Amazon using LEAD() and LAG() ...

Apache Spark has levels to it: - Level 0 You can run spark-shell or pyspark, it means you can start - Level 1 You understand the ...

Check out this simple roadmap that I followed to master SQL...

This is CS50, Harvard University's Introduction to the intellectual enterprises of computer science and the art of programming.

LINK in the comments - In CTE o insert your old query - In CTE n: insert your new query - In Difference CTE: - The first part selects ...

Aaj ke short mein hum cover kar rahe hain sabse important SQL Server aggregate functions — bilkul beginner-friendly tareeke se!

Window functions are one of the most important SQL topics for Data Analysts — and also one of the most confusing. Save this for ...

To follow along with this lecture, visit https://cs50.harvard.edu/sql. *** This is CS50, Harvard University's introduction to the ...

Welcome back to logical kanika! In this video, we're diving deep into one of the most powerful yet misunderstood concepts in SQL ...

For getting started in SQL checkout my full video on Intro to learning SQL!!

Hello! I'm Shubhanshi. Living and working as a Data Analyst in Hyderabad has shown me exactly what top companies are looking ...

Confused about SQL UNION, UNION ALL, and INTERSECT? Not sure when to use which? In this video, I break them down with ...

This confusion kills interviews • GROUP BY collapses rows • Window functions keep row-level data • Running total example ...

Subscribe & Comment 'sql' i will send you complete details and also will send you complete SQL checklist for Data Analyst ...

Master SQL Aggregate Functions! In this video, I'll break down COUNT, SUM, MIN, MAX, and AVG with easy-to-follow examples.

Window functions and aggregate function window function and aggregate function. Optimization technique so.

OVER() is the magic keyword • Doesn't collapse rows like GROUP BY • Use with: o ROW_NUMBER() o RANK() o ...