If i add 2 csv in one project , it's combined automatically?

No, CSV files aren't combined automatically in Clay. When importing multiple CSVs, you have three options: 1. Import to a new table (creates separate tables) 2. Add to an existing table (appends data to current table) 3. Replace current table (overwrites existing data) To combine CSVs, import the first file to create a table, then use "Add to existing table" for subsequent files.

Sources: Upload CSV to your table - Clay University Upload CSV to your table - Clay University Sources | Documentation | Clay University Sources | Documentation | Clay University