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 AutomatePractitioner
Implementing Power Automate Flow Ownership Transfer and Connection Rehoming at Scale
When employees leave, accounts get deprovisioned, or credentials rotate, Power Automate flows fail silently across your entire tenant. Learn how to enumerate orphaned flows, programmatically transfer ownership, and rehome connections to durable service principals before the damage happens.
23 min read
Power AppsPractitioner
Configuring Dataverse Activity Tables and Timeline Controls in Model-Driven Apps: Tracking Emails, Tasks, Appointments, and Custom Activities Against Records
Learn how Dataverse activity tables really work — the Activity base table, Activity Party model, and Regarding polymorphic lookup — and build a fully configured Timeline control for your model-driven app, including custom activity types and security-aware visibility. This is the lesson that turns the Timeline from a mystery into a deliberate design choice.
27 min read
SQLExpert
Nested Subqueries as JOIN Replacements: When to Swap EXISTS, IN, and Derived Tables for Cleaner, Faster Filtering
Most developers reach for JOINs out of habit, even when EXISTS, IN, or derived tables would produce cleaner results and better performance. This lesson teaches you exactly when and why to swap each approach — with the internals, edge cases, and real query examples to back it up.
28 min read
Microsoft ExcelExpert
Building a VBA-Powered Data Entry Validation Engine: Real-Time Input Checks, Dependent Drop-Downs, and Audit Logging in a UserForm
Learn how to build a production-grade data entry validation engine in Excel VBA — one that checks inputs in real time as users type, serves cascading dependent drop-downs, and writes a complete audit trail on every submission. This is the architecture that turns a UserForm into a serious business tool.
26 min read
Microsoft ExcelExpert
Mastering Excel's GETPIVOTDATA Function: Extract, Reference, and Build Dynamic Reports from PivotTable Data
Most analysts use PivotTables but still build dashboards with fragile cell references that break on every refresh. This deep-dive lesson teaches you to use GETPIVOTDATA to build label-based, parameter-driven reports that stay accurate no matter how your PivotTable changes. Learn the full syntax, dynamic patterns, error handling, and a complete executive dashboard build.
27 min read
Power AutomateExpert
Automating Time-Sensitive Approval Escalations in Power Automate: Using Do Until Loops, Timeout Conditions, and Teams Notifications to Enforce SLA Deadlines
Standard approval actions in Power Automate send a request and wait — but they don't remind, escalate, or enforce deadlines on their own. This lesson teaches you to build a production-grade escalation system using Do Until loops, UTC timestamp comparisons, and structured Teams notifications that actually drive action before SLAs breach.
27 min read
Power AutomateFoundation
Implementing Connection References in Power Automate Solutions: Mapping, Sharing, and Updating Connector Credentials Across Environments Without Breaking Deployed Flows
Connection references are the mechanism that lets your Power Automate flows travel cleanly between dev, test, and production without hardcoded credentials. This lesson teaches you how to create, map, share, and update them so environment promotions never break a running flow.
18 min read
SQLPractitioner
Aggregating Data from Multiple Subqueries: Combining Scalar and Derived Table Patterns in a Single SELECT
Learn how to build powerful single-query dashboards by combining scalar subqueries and derived tables in one SELECT statement. This lesson teaches you when to use each pattern, how to assemble them together, and the common mistakes that produce silently wrong results.
22 min read
Microsoft ExcelPractitioner
Scheduling and Running VBA Macros Automatically with Windows Task Scheduler and Application.OnTime
Learn how to build truly hands-free Excel automation by combining VBA's Application.OnTime with Windows Task Scheduler. This lesson covers everything from self-rescheduling macros to VBScript launchers, complete with production-grade error handling and logging.
23 min read
Microsoft ExcelPractitioner
Mastering Excel's IFERROR-Free Approach: Building Robust Lookup Formulas with ISBLANK, ISNUMBER, and ISTEXT for Professional Data Validation
Most Excel practitioners use IFERROR as a reflex — and inadvertently hide the data quality problems they should be fixing. This lesson teaches you to build lookup formulas that distinguish between missing data, wrong data types, and genuinely absent records, giving you precise control over every validation scenario.
20 min read
Power AutomateExpert
Automating Recurring Approval Reminders in Power Automate: Escalating Overdue Requests, Notifying Delegates, and Closing Stale Approvals Automatically
Most approval workflows send one email and go silent. This lesson teaches you to build a persistent, self-healing approval system with scheduled reminders, SLA-based escalation, OOF-aware delegate routing, and automatic closure of stale requests — all backed by SharePoint state management.
26 min read
Power AutomatePractitioner
Implementing Exponential Backoff and Circuit Breaker Patterns in Power Automate: Protecting Downstream Systems from Cascading Failures
When your retry logic becomes the attack — that's when you need exponential backoff and circuit breakers. This lesson teaches you how to implement both patterns in Power Automate using Do Until loops, Dataverse state tracking, and child flows, so your integrations protect downstream systems instead of hammering them during outages.
24 min read