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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 ...

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

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 ...

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

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

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

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

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

Ready to build your first SQL table? In this video, we'll walk through the SQL CREATE TABLE command step by step—perfect for ...

Query optimization in DBMS | Query Optimisation techniques- MOST IMPORTANT SQL/ DBMS INTERVIEW QUESTION. ✨Link to ...

Show me: • Window functions • CTEs • Business queries Then we talk. #SQL #HiringTruth.

SQL interview question -- Medium SQL Question How to use window functions in this case lag function. using these lines of codes ...

Struggling with slow SQL queries? Want to optimize them for lightning-fast performance? In this video, I'll walk you through SQL ...