In database terminology primary key refers to the column in a table that's intended to be the primary way of identifying rows. Each table must have exactly one, and it needs to be unique. This is usually some kind of a unique identifier associated with objects presented by the table, or if such an identifier doesn't exist simply a running ID number (which is incremented automatically).
Return Box Page¶
This page has a return box that you can use to share your code for tasks that do not involve returning it to Lovelace as your answer.