The problem with that is it assumes that there's no logic on the back end, outside the database, that transforms data before sending it to the client. If all y

The problem with that is it assumes that there's no logic on the back end, outside the database, that transforms data before sending it to the client. If all you want is a way to submit SQL queries from a front end to a SQL database, you could just have the front end talk directly to the database. There's no need for a back end app in that case. But APIs are for talking to applications.