Ishaan Patel

PowerBI & DAX Measures

How do filter context and row context work in DAX, and when should you use CALCULATE()?

Filter context filters rows, row context evaluates each row, and CALCULATE switches row context to filter context for advanced filtering.

PowerBI & DAX Measures

What are Star Schema relationships in PowerBI and how to handle Many-to-Many join relationships safely?

Use a bridge table with inactive relationships and activate them via USERELATIONSHIP or TREATAS to safely handle many‑to‑many in Power BI.

SQL & Data Warehousing

How to write modular, testable data transformation pipelines using dbt (data build tool)?

Compose reusable dbt models, tests, and macros for modular, testable pipelines, then run incrementally with schema validation.

PostgreSQL & Query Optimization

How to use declarative table partitioning in PostgreSQL 16 to accelerate historical time-series queries?

Leverage PostgreSQL 16's declarative `RANGE` partitioning on time-series data to accelerate historical queries by enabling efficient partition pruning, reducing I/O, and streamlining data management.

Snowflake & BigQuery Pipeline

What are Partitioning and Clustering in BigQuery, and how do they reduce query costs by 90%?

BigQuery Partitioning segments tables by a column, while Clustering sorts data within partitions, both reducing query costs and improving performance by minimizing data scans, often by 90%.

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