Query
CREATE TABLE room_boardings (
id TEXT PRIMARY KEY,
room_id TEXT NOT NULL REFERENCES rooms(id),
user_id TEXT NOT NULL UNIQUE REFERENCES users(id),
created_at INTEGER NOT NULL DEFAULT (unixepoch())
)
CREATE TABLE room_boardings (
id TEXT PRIMARY KEY,
room_id TEXT NOT NULL REFERENCES rooms(id),
user_id TEXT NOT NULL UNIQUE REFERENCES users(id),
created_at INTEGER NOT NULL DEFAULT (unixepoch())
)