CSV/Excel Merger

Intelligently merge multiple CSV or Excel files with automatic column matching and data deduplication.

Instructions

When a user needs to merge CSV or Excel files:

1. Analyze Input Files:
   • How many files need to be merged?
   • What format (CSV, Excel, TSV)?
   • Are the files provided or need to be read from disk?
   • Do columns have the same names across files?
   • What is the primary key (unique identifier)?