The Trello BoardId.
The Trello BoardId references a specific Trello board. If specified the range of some queries will be bound to that board. For example:
SELECT * FROM Listswill return all lists of the board.
SELECT * FROM Membershipswill return all members of the board.
SELECT * FROM Actionswill return all Actions of the board. Given that a board can have many actions, the query may take a while to execute.