Data Transformation Tutorials
Learn data transformation tips, tutorials, and best practices for developers and analysts.
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The Fastest Way to Convert Excel Columns to Python Lists
Stop typing lists by hand. Copy your Excel column and convert it to a Python list with quotes, cleaning, and deduplication in one step.
2026-01-15•3 min read
PythonExcelData Analysis
Generate SQL IN Clauses from Excel in Seconds
Convert a spreadsheet column into a properly formatted SQL IN clause. Handles quotes, duplicates, and data types automatically.
2026-01-14•3 min read
SQLExcelDatabase
How to Clean Excel Data Before Running SQL Queries
Remove duplicates, trim whitespace, and handle leading zeros when preparing spreadsheet data for database queries.
2026-01-13•4 min read
ExcelSQLData Cleaning
Convert Excel Lists to JSON Arrays for API Requests
Transform spreadsheet data into JSON format for API integrations, config files, and web applications. Works with single columns and multi-column tables.
2026-01-12•4 min read
JSONAPIExcel
Handling Leading Zeros in Product IDs and Part Numbers
Preserve or remove leading zeros when converting ID lists for database queries or code. Essential for part numbers, ZIP codes, and serial numbers.
2026-01-11•3 min read
Data CleaningExcelIDs