Aravind Patel

PowerBI & DAX Measures

How to debug slow DAX measures using DAX Studio and Performance Analyzer?

Combine Power BI Performance Analyzer with DAX Studio Server Timings and Query Plan to locate and fix slow DAX measures.

SQL & Data Warehousing

How to optimize SQL query execution plans for sub-second responses on multi-million row tables?

Combine covering/filtered indexes, proper MAXDOP, and targeted hints after profiling to achieve sub‑second queries on multi‑million‑row tables.

PostgreSQL & Query Optimization

When should you use B-Tree, GIN, GiST, and BRIN indexes in PostgreSQL databases?

Choose B-Tree for general equality/range, GIN for full-text/array/JSONB containment, GiST for spatial/range types and k-NN, and BRIN for large, naturally ordered tables.

Snowflake & BigQuery Pipeline

How do Snowflake Virtual Warehouses and BigQuery slots differ in cost and auto-scaling scaling models?

Snowflake uses per‑second credit warehouses with auto‑suspend and multi‑cluster scaling, while BigQuery bills slot‑seconds and scales via flex slots.

Snowflake & BigQuery Pipeline

What is Snowflake Dynamic Tables and how do they replace manual Airflow DAG orchestration?

Snowflake Dynamic Tables automate in-warehouse ELT by providing declarative, continuously refreshed views that replace external orchestrators like Airflow for many SQL-based data transformations.

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