GuideHollow Sheetshttps://sheets.guidehollow.com/Practical Excel & Google Sheets Guides, Examples and Free Toolsen-USExcel vs Google Sheets: Formula Compatibility Differences That MatterCompare FILTER signatures, array formulas, lookup version support, and date inputs using a small migration checklist and expected outputs.https://sheets.guidehollow.com/comparisons/excel-vs-google-sheets-formulas/https://sheets.guidehollow.com/comparisons/excel-vs-google-sheets-formulas/Google Sheets FILTER Function: Practical Examples and Common ErrorsCopy Google Sheets FILTER examples for one condition, AND, OR, and no matches, using a five-row dataset with expected outputs.https://sheets.guidehollow.com/formulas/google-sheets-filter-examples/https://sheets.guidehollow.com/formulas/google-sheets-filter-examples/How to Fix XLOOKUP Not Working in ExcelDiagnose unsupported Excel versions, missing matches, mismatched ranges, and duplicate keys with a small XLOOKUP repair dataset.https://sheets.guidehollow.com/troubleshooting/xlookup-not-working/https://sheets.guidehollow.com/troubleshooting/xlookup-not-working/How to Import CSV Files Without Losing Leading Zeros or Changing DatesPreserve CSV identifiers and date text during import, then validate raw values before converting any dates in Excel or Google Sheets.https://sheets.guidehollow.com/data-cleaning/import-csv-preserve-zeros-dates/https://sheets.guidehollow.com/data-cleaning/import-csv-preserve-zeros-dates/How to Remove Duplicate Rows in Excel and Google Sheets SafelyChoose duplicate keys, preview keep-first results, and avoid deleting meaningful revisions in Excel, Google Sheets, and raw CSV files.https://sheets.guidehollow.com/data-cleaning/remove-duplicate-rows/https://sheets.guidehollow.com/data-cleaning/remove-duplicate-rows/IFERROR vs IFNA in Excel and Google Sheets: Fix Errors Without Hiding ProblemsLearn when to use IFERROR or IFNA in Excel and Google Sheets, with two reproducible example tables, a diagnostic decision tree and safer error-handling formulas.https://sheets.guidehollow.com/formulas/iferror-vs-ifna-excel-google-sheets/https://sheets.guidehollow.com/formulas/iferror-vs-ifna-excel-google-sheets/SUMIFS with Dates: A Step-by-Step Excel and Google Sheets TutorialSum monthly amounts using an inclusive start and exclusive next-month boundary, with timestamp edge cases and expected Excel/Sheets totals.https://sheets.guidehollow.com/formulas/sumifs-with-dates/https://sheets.guidehollow.com/formulas/sumifs-with-dates/