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Excel Basics

Volatile Functions in Excel — What They Are and When to Avoid Them
How to Work with Dates and Times in Excel
Boolean Logic - TRUE or FALSE
How to Enter and Edit Data Correctly in Excel
Excel 365 vs Older Excel — Why the Upgrade Actually Pays for Itself

Formulas & Functions

How to Automate Reports with Dynamic Arrays and Tables
How to Use TEXTSPLIT, TEXTBEFORE, TEXTAFTER, and Combine Them Effectively
How to Filter Data with the FILTER Function Using One or More Criteria and Dropdown Lists
What Is a Recursive LAMBDA Function — and How to Use It Effectively
Budget vs Actual | (Part 04) Variance Report & Ledger
Formula Analysis
Budget vs Actual | (Part 03) Actual Cost Matrix
Budget vs Actual | (Part 02) Building the Cost Baseline
Budget vs Actual | (Part 01) The Architecture
LET Function: Faster Monthly Reports
Cell references in Excel: relative, absolute, mixed, and the special operators $, # and @
How to use LET: write cleaner and faster formulas
How to handle errors in Excel formulas — IFERROR, IFNA, ISERROR, ISERR, ISNA and when not to hide errors at all
Dynamic Arrays: Filter, Sort & Unique

list of articles

Data Management & Solutions

How to Combine Data from Multiple Sheets into One with Dynamic Arrays
Excel Data Validation & Dependent Lists
Data bars, colour scales and sparklines: data visualisation in Excel that doesn't use traditional charts.
Conditional formatting and custom cell formats in Excel — icons, colour rules, and data visualisation without charts
Workbook Analysis (FastExcel)
When VBA is too risky and every task needs not Excel but a working application
How to use Excel Tables: why every dataset should be in Table format
How to structure an Excel workbook. The four-layer architecture for maintainable spreadsheets.
How to clean messy data in Excel. Remove duplicates, trim spaces, fix formats

list of articles

Privacy & Compliance

Copilot in Excel and GDPR — what European businesses need to know

Corporate Documentation

Legal Notice
Privacy Policy
About SafeOffice

Excel Basics

5 articles · sorted newest first

Volatile Functions in Excel — What They Are and When to Avoid Them 2026-05-14 10m
How to Work with Dates and Times in Excel 2026-05-12 8m
Boolean Logic - TRUE or FALSE 2026-03-30 7m
How to Enter and Edit Data Correctly in Excel 2026-03-23 6m
Excel 365 vs Older Excel — Why the Upgrade Actually Pays for Itself 2026-03-14 5m

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