Migrating from Messy Excel Sheets to Enterprise Relational Databases
Many established factories on Daska Road and Paris Road manage multimillion-rupee production orders using nested Excel workbooks. As spreadsheets grow past 20,000 rows, formulas crash, files corrupt during multi-user network sharing, and unauthorized staff can easily copy the entire customer pricing database onto a USB thumb drive.
Our Zero-Downtime Data Migration Methodology
1. Schema Normalization: We map unorganized spreadsheet columns into a third normal form (3NF) relational PostgreSQL database schema with strict foreign key constraints.
2. Data Cleansing & Deduplication: Automated Python scripts sanitize phone numbers, standardize customer company names, and eliminate duplicate item codes.
3. Automated Differential Cutover: We run the new database in parallel with existing spreadsheets for 7 days to verify financial parity before full operational transition.
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