5 tutorials tagged “data-cleaning”.
Numbers stored as text break SUM, lookups and sorting. Spot them in seconds, then convert with Convert to Number, Paste Special, Text to Columns, VALUE/NUMBERVALUE or Power Query, plus the hard cases.
TRIM leaves spaces behind? Find out exactly which character it is with one formula, then remove non-breaking spaces (CHAR 160), line breaks, tabs and zero-width characters in Excel or Google Sheets.
Excel dates left-aligned, not sorting, or giving #VALUE!? Detect dates stored as text and convert them with DATEVALUE, Text to Columns, Paste Special or DATE+MID.
Pull email addresses out of messy text in Google Sheets with REGEXEXTRACT. Covers whole columns, several emails in one cell, names, domains and validation.
Highlight values that appear in both columns in Google Sheets with a COUNTIF custom formula. Covers one column, both columns, same row, missing values, case and spaces.