After you create an App under the userapplications, please prepare your database schema first. In MySQL, you could run the command of mysqldump or just use the Workbench to output the database schema. The output file name .sql and it could be used by our platform.
Select the App name you create, then you will see the message 'No data yet. Please click input button to create tables.' So please click the Add button to input the database schema directly. This platform will parse the SQL statements and then create tables and their column types, nullable, and length are important for us. The corresponding UI will be constructed by using these information.