#data cleaning

Everything we have written about data cleaning.

Data & Analytics Trending

How to Improve Data Quality: A Checklist for Accuracy, Completeness and Freshness

A practical checklist for improving data quality, with accuracy, completeness, freshness and duplicate checks you can run in a spreadsheet or SQL, plus simple monitoring ideas.

Oct 9, 2026 10 min read

Data & Analytics Trending

How to Clean Data: A Step-by-Step Guide for Excel and SQL

An 8-step process for cleaning messy data, with the exact Excel functions and SQL queries to fix duplicates, missing values, stray spaces, bad dates and inconsistent categories.

Oct 8, 2026 11 min read