Google Sheets array literals: the curly brace guide
Build arrays inline with curly braces in Google Sheets — stack ranges, fix locale errors, feed FILTER or QUERY. Read the patterns that save real time.
Formulas
Excel remove duplicates vs UNIQUE: when to use which
Excel remove duplicates vs UNIQUE function: which handles blanks, case, edge cases, and large data better, and when each one is the right pick. Read on.
IMPORTHTML in Google Sheets: pull tables from any page
IMPORTHTML in Google Sheets pulls a table or list straight from a URL. See the syntax, the index trick, QUERY slicing, and why some pages just won’t load.
Google Sheets named functions: build your own formula
Google Sheets named functions wrap long formulas behind one call. Build, debug, import, and know when a helper column wins instead. Read on.
Google Sheets REGEXREPLACE: clean messy text columns
REGEXREPLACE in Google Sheets fixes messy text in bulk — strip junk, reformat dates, standardize phones. Patterns, ARRAYFORMULA, RE2 gotchas inside.
GOOGLEFINANCE in Google Sheets: pull live stock prices
Use GOOGLEFINANCE in Google Sheets to pull live stock prices, currency rates, and historical data, with the attributes and fixes that matter. Read on.
Power Pivot DAX measures for beginners, step by step
Power Pivot DAX measures confuse most beginners. Write your first explicit measure, fix wrong grand totals, and learn SUM vs SUMX. Start here.
Excel TEXTSPLIT: split one cell into multiple columns
Excel TEXTSPLIT splits one cell into columns or rows with a single live formula. See the syntax, multi-delimiter tricks, and how to fix #SPILL errors.
Excel dependent dropdown lists: INDIRECT, Tables, or FILTER
Build a dependent dropdown in Excel three ways: INDIRECT named ranges, Excel Tables, or the Excel 365 FILTER function. See which one fits your data.
A Beginner’s Guide to Data Validation in Excel: Ensuring Accurate Inputs
A beginner’s guide to Excel data validation — what it does, your first dropdown, simple number and date rules, friendly messages, and where to use it first.
How to Use IF Statements in Excel for Decision Making
Use IF statements in Excel for decision-making — basic IF, combining conditions with AND/OR, nested IF vs IFS, IFERROR, building flags, and the mistakes that tangle IF formulas.
A Comprehensive Guide to Data Validation in Excel: Preventing Input Errors
Advanced Excel data validation — self-growing dropdowns, cascading multi-level lists, custom-formula rules, validating imports, and layering validation with formatting and protection.