With Knack, we make it very easy to migrate or transfer your data. Using the export tools within your current database provider, you can create .csv files for your data.
In the Knack Builder, you can import these .csv files to create or update existing Objects (tables). The only part left for you to manually setup will be the pages (forms, lists, calendars, and more).
During the free trial, feel free to let us know if there are additional questions we can answer about migrating.