PostgreSQL per project, described in plain language, no SQL required.
See and edit your app's real data like a spreadsheet. Open tables side by side in tabs, search and filter them, and fix a value in place. Changes wait until you press Apply, then all of them are saved or none are, so your live data is never left half-edited. Every row keeps a history of who changed what, and you can download any view as a CSV file.
Describe the change you want, like "add a notes field to orders", and Insight prepares it for you to review and apply. Each change is checked first and either goes through completely or not at all. Adding is always safe; if a change removes or renames something, you are told before you apply it that older versions of your app may stop working if you go back to them.
A picture of how your data fits together. Each box is a list of things, like orders or customers, and each line shows one thing pointing at another, like an order pointing at the customer who placed it. Columns are described in plain words, such as "Links to customers" or "Choice: pending, paid, shipped", so you never need database vocabulary to read it.