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English
$
USD
I will clean and standardize your messy dataset in excel sql or python
I'm a freelance Data Analyst and my top skills are Excel, SQL, and Power BI
I'm a data analyst and data entry specialist who helps businesses transform messy data into clear, actionable insights with Excel and Power BI dashboards. Using SQL, Power BI, Excel, and Python, I bu...
About this Gig
Messy data leads to wrong decisions. Duplicates, inconsistent formats, missing values, and broken records quietly damage your reporting, and most businesses don't catch it until it's already caused a problem.
I clean and standardize raw datasets so they're reliable, consistent, and ready for analysis or reporting. Working across Excel, SQL, and Python, I apply my 3D Data Cleaning System: Diagnose every issue in your dataset, Decontaminate by fixing and standardizing it, and Document every change for full transparency. Whether it's a few hundred rows or thousands of records, I'll leave you with data you can actually trust.
Built for businesses, analysts, and teams who are tired of second-guessing their numbers.
What I fix:
- Duplicate record removal & deduplication
- Standardization of formats (dates, names, categories, phone numbers)
- Handling of missing, null, or zero values
- Data type corrections and validation checks
- Change log documenting every edit made
- Delivery in your preferred format (Excel, CSV, SQL)
Every delivery includes a change log so you know exactly what was cleaned and why.
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My Portfolio
FAQ
How will I know what was changed in my dataset?
You'll receive a change log alongside the cleaned file. It lists every type of issue found, what was done to fix it, and how many records were affected for full transparency, always.
Which tool will you use — Excel, SQL, or Python?
It depends on your dataset. Smaller files get Excel; larger or more complex data gets SQL or Python (Pandas). I'll choose the right tool for your specific situation and let you know upfront.
Will you delete records without telling me?
Never. If I'm unsure whether a record should be removed, I'll flag it for your review rather than make the call myself.
Can you clean data spread across multiple files?
Yes, the Standard tier is built for multi-file datasets. Share all the files, tell me how they relate, and I'll handle it.
