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Learn the difference between Conditional Column and Custom Column in Power Query – when to use which, practical formula examples, and a common mistake.

Learn how to use Group By in Power Query – grouping data and calculating totals, averages, and counts. Simple and advanced examples.

Learn how to handle dates and time in Power Query – Date/DateTime type, extracting year and month, creating dates from text, and fixing Locale problems.

Learn how the entire Power BI process works – from data preparation with Power Query, through the data model and DAX calculations, to visualizations and KPIs.

Learn why it’s worth switching from VLOOKUP to XLOOKUP in Excel tables – fewer errors, simpler syntax, and more reliable table merging.

Learn the 3 most common VLOOKUP mistakes in Excel tables – wrong column numbers, breaking formulas, left-side lookups – and how to avoid them.

Learn how to merge two Excel tables using a shared ID column with XLOOKUP. Simple merging logic and a practical example.

Learn the 3 most common reasons why XLOOKUP doesn’t work in Excel tables – spaces, mismatched formats, duplicate IDs – and how to fix them.

Learn the difference between XLOOKUP and VLOOKUP in Excel tables and which function to use in your situation. Key differences and practical tips.

Learn how to check whether your XLOOKUP results in Excel are correct. COUNTIF verification, duplicate detection, and common mistakes.