How many columns can an input have for Data Prep? March 23, 2021 19:37 Updated ~ minute read Follow Data Prep supports up to 400 columns per input. Related articles How many different Inputs can I upload into a single Data Prep process? What do I do if my Data Prep submissions get out of sync? Data inputs for a two-sided process Single Sign On (SSO) for Duco Onboarding Checklist