Articles

Master Time Intelligence in DAX: YTD, MTD, Previous Period & Rolling Averages

Transform static data into dynamic business insights with DAX time intelligence functions. Learn to build YTD, MTD, period comparisons, and rolling averages that automatically adjust to any date context.

Error Handling and Try-Otherwise Patterns in M: Building Production-Ready Power Query Solutions

Master advanced error handling in M language with comprehensive strategies for building robust, production-grade Power Query solutions that gracefully handle failures and adapt to changing data conditions.

Master Excel Tables: Advanced Sorting, Filtering, and Dynamic Data Management

Transform static spreadsheets into powerful data management systems with Excel Tables. Learn advanced sorting algorithms, complex filtering criteria, and dynamic formula techniques that scale to enterprise datasets.

How to Successfully Transition to Data from Another Career: A Strategic Guide

Master the art of career transition into data by leveraging your existing expertise, building a compelling portfolio, and navigating the job market strategically. Learn what really matters for data roles beyond technical skills.

When to Use Claude vs Codex: Strategic AI Tool Selection for Developers

The Data Analyst Interview: Technical and Behavioral Preparation

Master every aspect of data analyst interviews with systematic preparation covering SQL assessments, statistical reasoning, behavioral questions, and business case studies that demonstrate both technical competence and business judgment.

Salary Negotiation for Data Professionals: Advanced Strategies for Maximizing Compensation

Master the complex art of salary negotiation in data roles through systematic research, strategic leverage building, and advanced tactics that account for equity compensation, remote work dynamics, and the unique market conditions facing data professionals.

Claude Code Prompting Best Practices to Save Tokens

Data Modeling for Analytics: Dimensional Modeling vs One Big Table

Learn when to use dimensional modeling's star schemas versus modern One Big Table approaches for analytical data. Compare both methods with hands-on examples using real e-commerce and SaaS data.

Structured Output: Getting JSON, Tables, and Code from LLMs

Master the techniques to get reliable JSON, formatted tables, and executable code from any large language model instead of parsing unpredictable text responses.

Master SQL Filtering and Sorting: WHERE, AND, OR, IN, BETWEEN, ORDER BY Complete Guide

Learn to extract precise insights from large datasets using SQL's essential filtering and sorting operations. Master WHERE clauses, logical operators, range filtering, and result organization with practical examples.

Master DAX CALCULATE and Filter Context in Power BI

Deep dive into DAX's most powerful function and the invisible force that controls your data calculations. Learn advanced patterns, optimization techniques, and troubleshooting methods that separate DAX experts from the rest.