Find out how to generate a SQL DDL script using Vertabelo and what this script does. You probably already know what ER diagrams are. If you're not sure, you can find out here. You can create ERDs easily in Vertabelo. But did you know that Vertabelo can also generate a SQL DDL script from your physical ER diagram? Of course, you first need to create a physical diagram. Once your ER diagram is ready, you can create a DDL (Data Definition Language) script.