Gyromitra
Power BI Blog
Practical guides on Power BI, DAX, data modeling, and the PL-300 certification — written by a Microsoft Certified Trainer.
Row-Level Security in Power BI: Static vs Dynamic, With a Walkthrough
RLS shows up in both the modeling and deployment domains of PL-300. Here's how static and dynamic row-level security actually work, with a walkthrough you can rebuild yourself.
Common DAX Mistakes: SUM vs SUMX, and When Each Is Right
SUM and SUMX look interchangeable until they aren't. A practical guide to when a plain aggregation works, when you need an iterator, and the row-level calculation mistake that costs candidates marks on PL-300.
Time Intelligence in DAX: YTD, MTD, Prior-Year, and Rolling Averages
A practical walkthrough of the DAX time intelligence functions PL-300 tests most — year-to-date, month-to-date, same-period-last-year, and rolling averages — and the date table rules that make them work.
Row Context vs Filter Context: The DAX Concept Most Candidates Fail
Row context and filter context look similar and behave completely differently. Here's how to tell them apart, why calculated columns and measures don't mix the way people expect, and what PL-300 tests.
How to Build a Proper Date Table in Power BI (PL-300 Guide)
Auto Date/Time silently breaks time intelligence and bloats your model. Here's how to build a real date table, mark it correctly, and why PL-300 expects you to know the difference.
DAX CALCULATE Explained: 3 Worked Examples for PL-300
CALCULATE is the function most PL-300 candidates never fully understand. Three real worked examples — filter overrides, percent-of-total, and context transition — explained step by step.
PL-300 Pass Rate & Exam Difficulty: What the Data Shows
How hard is the PL-300 Power BI exam? We break down the pass rate, difficulty by domain, and what it actually takes to pass on your first attempt — from a Microsoft Certified Trainer.
Power BI Certification Cost in Canada (2026): PL-300 Exam & Training Fees
Complete breakdown of what you'll actually spend to get PL-300 certified in Canada — exam fees, training options, employer reimbursement, and how to minimise your total investment.
PL-300 Exam Questions: 25 Free Practice Questions with Answers
Practice for the PL-300 Power BI exam with 25 free exam-style questions covering all four domains. Instant scoring, per-question explanations, and a domain breakdown.
Is the PL-300 Certification Worth It in 2026?
An honest look at the PL-300's career value: salary data, job market demand in Canada, who benefits most, and who should probably skip it.
Power BI vs Tableau: Which Is Better for Canadian Professionals in 2026?
Job market data, cost comparison, M365 integration, and an honest verdict on which tool — and which certification — will open more doors in Canada.
The Complete PL-300 Study Guide: How to Pass the Power BI Data Analyst Exam
Everything you need to know to prepare for and pass the Microsoft PL-300 exam — exam format, topic breakdown, study timeline, and the resources that actually work.
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