I developed a platform that helps users learn dimensional modeling and create entity-relationship (ER) diagrams through a drag-and-drop interface tailored to specific use cases. I noticed that many people struggle with visualization and face a significant gap between understanding database concepts and creating tables. This can make it difficult to work independently or determine which type of table to use and when, including whether to create a dimension or fact table. Step-by-step: 1. I identified the difficulty many people have visualizing dimensional modeling concepts. 2. I created a platform focused on learning dimensional modeling and ER diagrams. 3. I built a drag-and-drop interface tailored to specific use cases. 4. I designed it to help users understand how to create tables and determine whether to use a dimension table or a fact table.