Articles

Cost Management in Cloud Data Platforms

Building a Document Q&A System with Embeddings: A Complete Beginner's Guide

Learn to build an AI-powered document Q&A system from scratch using embeddings and language models. No prior AI experience required—just practical Python skills and clear explanations.

Mastering SQL Filtering and Sorting: WHERE, AND, OR, IN, BETWEEN, ORDER BY

Learn to build complex SQL queries with precise filtering conditions and custom sorting logic. Master WHERE clauses, logical operators, range filtering, and multi-column sorting for real-world data analysis.

Row Context vs Filter Context: The Mental Model Every DAX User Needs

Master the fundamental difference between row context and filter context in DAX. Learn why the same formula can produce completely different results and how to control context for predictable calculations.

Advanced JSON and XML Processing in Power Query M Language

Master sophisticated techniques for processing semi-structured data in M, including recursive navigation, namespace handling, performance optimization, and building resilient transformation pipelines for production systems.

Advanced Excel Tables: Master Dynamic Sorting, Filtering & Structured Data Management

Transform your Excel data analysis with advanced Table techniques. Learn structured references, complex filtering strategies, and optimization patterns that scale to enterprise datasets.

Starting a Data Freelancing Business: Essential Tools, Pricing Strategies, and Landing Your First Clients

Learn to transition from data professional to successful freelancer with practical guidance on business tools, pricing strategies, and proven methods for finding clients who value your expertise.

Real-Time Data: When to Use Streaming vs Batch Processing

Master the fundamental choice between streaming and batch processing. Learn when each approach works best and how to build hybrid systems that combine both for optimal results.

Building a Production Document Q&A System with Vector Embeddings

Learn to build a scalable document Q&A system using embeddings and RAG. Covers advanced chunking, vector search optimization, prompt engineering, and production deployment with real-world regulatory compliance examples.

Filtering and Sorting Data in SQL: WHERE, AND, OR, IN, BETWEEN, ORDER BY

Master SQL's filtering and sorting operations to transform overwhelming datasets into precisely targeted results. Learn to combine multiple conditions and organize data exactly how you need it.

Advanced DAX Patterns: Variables, SWITCH, and Iterator Functions

Master the three pillars of expert DAX development: variables for performance optimization, SWITCH for elegant conditional logic, and iterators for precise data control. Transform complex business requirements into maintainable, efficient Power BI measures.

Advanced JSON and XML Data Processing in Power Query M Language

Master complex semi-structured data transformations with defensive navigation, performance optimization, and real-world multi-source integration patterns in M.