You will get a clean, organized and validated Excel or CSV dataset
Project details
You will receive a clean, accurate, and analysis-ready dataset that saves time and improves the reliability of your business decisions.
As a Data Analyst with experience in SQL, Python, Excel, and data visualization, I specialize in transforming messy datasets into structured, high-quality data that can be confidently used for reporting, dashboards, business intelligence, and analytics projects.
My data cleaning services include:
• Duplicate detection and removal
• Missing value handling
• Data validation and quality checks
• Standardization of formats, dates, and text fields
• Error and inconsistency correction
• Outlier identification
• Dataset restructuring and preparation for analysis
I pay close attention to detail and document every cleaning step, ensuring transparency and reproducibility throughout the process.
Whether you're preparing data for Power BI, Tableau, Excel reporting, SQL analysis, or machine learning projects, I will deliver a reliable dataset that is ready for the next stage of your workflow.
As a Data Analyst with experience in SQL, Python, Excel, and data visualization, I specialize in transforming messy datasets into structured, high-quality data that can be confidently used for reporting, dashboards, business intelligence, and analytics projects.
My data cleaning services include:
• Duplicate detection and removal
• Missing value handling
• Data validation and quality checks
• Standardization of formats, dates, and text fields
• Error and inconsistency correction
• Outlier identification
• Dataset restructuring and preparation for analysis
I pay close attention to detail and document every cleaning step, ensuring transparency and reproducibility throughout the process.
Whether you're preparing data for Power BI, Tableau, Excel reporting, SQL analysis, or machine learning projects, I will deliver a reliable dataset that is ready for the next stage of your workflow.
Data Tool
Microsoft ExcelWhat's included
| Service Tiers |
Starter
$25
|
Standard
$50
|
Advanced
$100
|
|---|---|---|---|
| Delivery Time | 2 days | 3 days | 5 days |
Number of Revisions | 1 | 2 | 3 |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$15 - $30Frequently asked questions
About Claudenilson
Data Analyst | SQL Queries, Dashboards & Data Cleaning
Recife, Brazil - 4:53 pm local time
I help companies understand what is really happening in their data by combining strong analytical thinking, clean data practices, and clear visual communication.
What I do best:
Data cleaning and preparation (Excel, SQL & Python)
Exploratory Data Analysis (EDA) with business context
Dashboards and reports (Power BI, charts, KPIs)
Turning numbers into actionable insights, not just charts
I’ve worked with real-world datasets involving thousands of records, following a structured analytical process that mirrors how data is handled in real companies — from raw data to insights and recommendations.
Background & strengths:
Degree in Data Science
Experience working in an international environment using English daily
Strong focus on business questions, not just technical execution
Clear communication of findings for non-technical stakeholders
If you’re looking for someone who doesn’t just analyze data, but explains what it means and how to use it, I’d be happy to help.
Let’s turn your data into decisions.
Steps for completing your project
After purchasing the project, send requirements so Claudenilson can start the project.
Delivery time starts when Claudenilson receives requirements from you.
Claudenilson works on your project following the steps below.
Revisions may occur after the delivery date.
Dataset Assessment
Review the dataset structure, identify data quality issues, and define the cleaning strategy.
Data Cleaning
Handle missing values, remove duplicates, standardize formats, correct inconsistencies, and validate data quality.