Weekly CSV Consolidation with Validation

Weekly CSV Consolidation with Validation

This self-initiated prototype demonstrates a repeatable consolidation workflow using fictional order data. A master CSV and three incoming batches share an explicit four-column schema. All sources are validated before any update is applied.

The workflow appends new order IDs and replaces existing records in batch order: 1, then 2, then 3. Orders absent from later files remain in the master. Duplicate IDs within one source, malformed dates and invalid amounts reject the run. The demo exports the updated master and a log showing each change and its source batch.

The sample finishes with four orders, two insertions, two update events and US$670 of order amounts. That amount is sample data, not revenue earned by this project. Browser and JavaScript checks cover reconciliation, invalid-source rejection, preserved inputs and unchanged records. Built with AI-assisted development. This prototype uses pasted CSVs with local browser processing; scheduling, live integrations and different schemas would be separately scoped.

Try the working demo: https://hectorarriolai.github.io/practical-tools-demos/demos/merge.html View the code: https://github.com/hectorarriolai/practical-tools-demos