The Library · Insights
Deep dives across data, automation & AI
1253 in-depth articles — from Excel foundations to production machine learning. Filter by topic or difficulty to find exactly what you need.
Power BIExpert
DAX Survey and Likert Scale Patterns: Weighted Scores, Response Distribution, and NPS in Power BI
Master the DAX patterns that make survey analytics actually work at scale: weighted Likert score calculations, response distribution measures that always sum to 100%, and Net Promoter Score that survives any slicer combination your stakeholders can throw at it. Built for real enterprise survey datasets, not toy examples.
24 min read
Power BIPractitioner
Transforming and Cleaning Data in Power Query: Merging Queries, Grouping Rows, and Pivoting Columns for a Clean Data Model
Most Power BI problems start in the data layer — wrong grain, wide formats, disconnected tables. This lesson teaches you how to merge queries, group rows, and unpivot columns in Power Query so your model is clean before a single measure gets written.
21 min read
Power QueryPractitioner
Implementing Custom Table Diffing and Schema Comparison Pipelines in Power Query M: Detecting Added, Removed, and Changed Columns Across Refresh Cycles
Schema drift silently breaks Power Query pipelines when source systems rename or remove columns without warning. This lesson walks you through building a complete, production-ready schema diffing engine in M that detects added, removed, and modified columns across refresh cycles — complete with severity levels, rename heuristics, and alerting hooks.
23 min read
Power QueryPractitioner
Automating Data Refresh and Load Destinations in Power Query: Controlling Output Tables, Connection-Only Queries, and Data Model Targets
Most Power Query users let default load settings create unnecessary worksheet tables and bloated workbooks. This lesson teaches you to deliberately control every output destination — connection-only staging layers, Data Model loading, and worksheet tables — so your pipelines are clean, fast, and production-ready.
21 min read
Microsoft ExcelPractitioner
Building a VBA-Powered Dynamic Gantt Chart Engine: Programmatically Generate, Update, and Format Project Timelines Using Conditional Formatting and Shape Automation
Manual Gantt charts are a time sink that skilled Excel practitioners should never accept. This lesson walks you through building a complete VBA engine that reads a project data table and automatically generates a formatted, shape-based Gantt chart with date headers, task bars, milestones, progress indicators, and a today line — rebuilt from scratch with a single macro call.
26 min read
Microsoft ExcelPractitioner
Mastering Excel's Fill Handle, Series, and AutoFill Options for Fast Data Entry and Pattern Generation
Stop typing data by hand. This practical lesson teaches you how to use Excel's Fill Handle, Series dialog, Custom Lists, and Flash Fill to generate complex sequences, date ranges, and structured data in seconds — exactly the way production-level data professionals do it.
20 min read
Power AutomateFoundation
Collecting Approver Responses and Sending Outcome Emails with Power Automate: A Beginner's End-to-End Approval Flow
Learn how to build a complete approval workflow in Power Automate from scratch — sending approval requests, capturing the decision, and automatically emailing the outcome while posting a Teams notification. No coding required, and every concept is explained from first principles.
17 min read
Power AutomateExpert
Designing Power Automate Network-Level Isolation: Configuring Virtual Network Data Gateways, Private Endpoints, and Managed Connector Egress for Zero-Trust Enterprise Environments
Learn how to eliminate public internet exposure from Power Automate connector traffic using VNet Data Gateways, Azure Private Endpoints, and Managed Connector Egress policies. This deep-dive lesson walks through the complete architecture, provisioning steps, DNS configuration, and validation techniques required to meet zero-trust compliance requirements in regulated enterprise environments.
29 min read
Microsoft FabricExpert
Implementing Cross-Workspace Data Sharing in Microsoft Fabric with OneLake Shortcuts: Exposing Lakehouse and Warehouse Tables to Downstream Workspaces Without Copying Data
Stop copying data between Fabric workspaces. This expert-level lesson shows you how to use OneLake shortcuts to expose lakehouse and warehouse tables to downstream workspaces, covering permissions, performance, warehouse security caveats, and a hands-on multi-workspace exercise. Learn the hub-and-spoke shortcut pattern used by mature Fabric platform teams.
30 min read
PythonExpert
Building a pandas Attribution Model: Allocating Revenue Across Multi-Touch Customer Journeys Using First-Touch, Last-Touch, and Linear Attribution Rules
Learn how to build a complete marketing attribution engine in pandas that processes raw event-level touchpoint data, correctly handles multi-conversion customers, and applies first-touch, last-touch, and linear attribution models with full revenue conservation validation. This is the attribution infrastructure your marketing team doesn't know to ask for.
24 min read
Power AppsExpert
Configuring Dataverse Column Security Profiles and Field-Level Permission Assignments: Restricting Sensitive Column Access Across Security Roles, Teams, and Users in Model-Driven Apps
Table-level security isn't granular enough when you need to hide salary data from managers who can see the rest of an employee record. This lesson teaches you how Dataverse Column Security Profiles work architecturally, how to create and configure them, and how to assign them across security roles, teams, and users — including the edge cases that silently break integrations and audit trails.
30 min read
Power AutomateExpert
Automating Two-Factor Authentication and OTP Handling in Power Automate Desktop: Intercepting SMS, Email, and Authenticator Codes for Unattended Login Flows
Two-factor authentication breaks most unattended bots — but it doesn't have to break yours. Learn how to intercept SMS OTPs via API, extract email codes with Microsoft Graph, and generate TOTP codes programmatically to complete 2FA login flows in Power Automate Desktop without any human intervention.
30 min read