How to Answer Any “Show Me the Last 3 Months” Question With SQL
Date functions that handle time-based business questions automatically
How to Build a Multi-Step Analysis With CTEs (Step by Step)
The technique that turns complex business questions into manageable steps
How to Document Your SQL Work So Anyone Can Understand It
The habits that make your analysis reusable, trustworthy, and promotable
How to Compare Any Customer to the Average (Using Subqueries)
This pattern turns isolated metrics into meaningful insights
How to Answer “How Many?” and “How Much?” in One SQL Query
COUNT and SUM are the two functions you’ll use every single day
How to Find Why Customers Cancel (Using SQL Pattern Analysis)
Cancellation data tells you more than booking data ever will
How to Build Customer Tiers With a Single SQL Query
Label customers as VIP, Standard, or At-Risk without Excel
How to Present SQL Insights to Executives Who Don’t Care About Code
Three techniques that turn technical analysis into business impact
How to Rank Items Within Categories (Without Grouping Hell)
Window functions let you compare and rank without losing detail
Your First JOIN – Connecting Customers to Their Bookings
The one pattern that unlocks 80% of real-world business queries