บทเรียน Excel

Learn how to clear Excel cache on Windows and Mac to solve common problems like lag and sync errors, and follow best practices to keep Excel running smoothly.

Learn how Excel version history helps you view, restore, and recover previous file versions without losing your current work.

Learn how to add days to a date in Excel using simple arithmetic and functions like DATE(), EDATE(), and WORKDAY(), with practical examples and pitfalls to avoid.

Learn how to show formulas for a full worksheet, check individual cells, prepare files for review or printing, and avoid common issues.

Large Excel files slow everything down and make sharing harder than it should be. This guide explains why Excel files grow over time and shows practical, safe ways to reduce file size.

Learn how to connect tables, write DAX formulas, and build interactive reports inside Excel.

A practical guide to using SUMPRODUCT() for conditional, weighted, and matrix-based calculations in Excel

Learn what circular references are, why they cause problems, and how to fix them using simple and advanced techniques.

Learn how to use Excel Solver to solve optimization problems with multiple constraints and decision variables. This guide covers setup, solving, and interpreting results with a practical example.

Learn how to freeze multiple rows in Excel with step-by-step instructions, tips, and troubleshooting to keep your headers visible while scrolling.

Learn proven ways to convert Excel to CSV, manually, programmatically, and in bulk, while maintaining data accuracy, encoding, and security.

Learn how to create this wonderfully compact and elegant cell-sized visualization in Excel that is perfect for summary trend and data visualization.