BEGIN TRANSACTION;

CREATE TABLE IF NOT EXISTS "ns-syncs" (
	"username"    TEXT    NOT NULL,
	"source"      TEXT    NOT NULL,
	"destination" TEXT    NOT NULL UNIQUE,
	UNIQUE("username", "source", "destination"),
	FOREIGN KEY("username") REFERENCES "users"("id"),
	FOREIGN KEY("destination") REFERENCES "zones"("zone")
);

COMMIT;