--- title: "SANDEEP KUMAR RAJU SANGARAJU (@sangarajus) | Hashnode" description: "SANDEEP KUMAR RAJU SANGARAJU (@sangarajus) writes on Hashnode. Read their latest articles and follow their work." url: "https://hashnode.com/@sangarajus" --- @sangarajus # SANDEEP KUMAR RAJU SANGARAJU @sangarajus · San Francisco, USA · Joined March 2026 ### [From 14 Days to 8 Minutes: How We Solved the ML Experimentation Bottleneck With IaC and Spot Instances](https://datatrail.hashnode.dev/ml-experimentation-bottleneck-with-iac-and-spot-instances?utm_source=hashnode&utm_medium=feed) Build a self-service ML platform that eliminates tickets, approvals, and idle GPUs — using Terraform, OPA, and Spot Instances. 13 min read · [datatrail.hashnode.dev](https://datatrail.hashnode.dev/ml-experimentation-bottleneck-with-iac-and-spot-instances?utm_source=hashnode&utm_medium=feed) [Mar 25](https://hashnode.com/posts/ml-experimentation-bottleneck-with-iac-and-spot-instances/69c341f3428c6a5930339400) ### [Migrating Teradata Column Alias References to BigQuery: The UNNEST Pattern Explained](https://datatrail.hashnode.dev/migrating-teradata-column-alias-references-to-bigquery?utm_source=hashnode&utm_medium=feed) How Teradata's column alias chaining translates to BigQuery's CROSS JOIN UNNEST pattern — and why migration tools use it 8 min read · [datatrail.hashnode.dev](https://datatrail.hashnode.dev/migrating-teradata-column-alias-references-to-bigquery?utm_source=hashnode&utm_medium=feed) [Mar 21](https://hashnode.com/posts/migrating-teradata-column-alias-references-to-bigquery/69be885081717c29713a06cf) ### [Taming the Beast: A DBA's Playbook for Conquering Billion-Row Performance Bottlenecks Between SQL Server and Power BI](https://datatrail.hashnode.dev/conquering-billion-row-performance-bottlenecks-between-sql-server-and-power-bi?utm_source=hashnode&utm_medium=feed) 10 strategies across SQL Server and Power BI that took our dashboard load times from 45 seconds to under 3 — on a 2-billion-row dimensional model 21 min read · [datatrail.hashnode.dev](https://datatrail.hashnode.dev/conquering-billion-row-performance-bottlenecks-between-sql-server-and-power-bi?utm_source=hashnode&utm_medium=feed) [Mar 21](https://hashnode.com/posts/conquering-billion-row-performance-bottlenecks-between-sql-server-and-power-bi/69be0e8b475ca17974660bd7) ### [The OG of Data Science: MicroStrategy Had It All Before It Was Cool](https://datatrail.hashnode.dev/data-science-microstrategy-had-it-all?utm_source=hashnode&utm_medium=feed) While the world was discovering 'data science' around 2012, MicroStrategy had quietly been shipping regression models, clustering algorithms, and forecasting engines since the late 1990s. Here are five powerful examples that prove it. 14 min read · [datatrail.hashnode.dev](https://datatrail.hashnode.dev/data-science-microstrategy-had-it-all?utm_source=hashnode&utm_medium=feed) [Mar 20](https://hashnode.com/posts/data-science-microstrategy-had-it-all/69bcd47901d8a1a1a00acd49) ### [Teradata to BigQuery Migration: The Case Sensitivity Trap Nobody Warns You About](https://datatrail.hashnode.dev/teradata-to-bigquery-migration-the-case-sensitivity-trap-nobody-warns-you-about?utm_source=hashnode&utm_medium=feed) Why queries break after migrating Teradata to BigQuery. Learn 8 practical solutions to fix case sensitivity issues at enterprise scale. 18 min read · [datatrail.hashnode.dev](https://datatrail.hashnode.dev/teradata-to-bigquery-migration-the-case-sensitivity-trap-nobody-warns-you-about?utm_source=hashnode&utm_medium=feed) [Mar 16](https://hashnode.com/posts/teradata-to-bigquery-migration-the-case-sensitivity-trap-nobody-warns-you-about/69b891e72ad6ae51840ba03a)