DDL tab

Hi! Thanks for reaching out. We know this isn't quite convenient, but for some reason, certain versions of MySQL Workbench don't have this tab.  Therefore, you can download a different version of MySQL Workbench from here, if you wish. https://dev.mysql.com/downloads/workbench/ Hope this helps but please feel free to get back to us should you need further assistance. Thank you.
Best,
Martin