\c iobeam
CREATE TABLE conditions (
  time BIGINT NOT NULL,
  device_id TEXT NOT NULL,
  temp DOUBLE PRECISION NULL,
  humidity DOUBLE PRECISION NULL
);

CREATE INDEX ON conditions (time DESC NULLS LAST, device_id);
CREATE INDEX ON conditions (time DESC NULLS LAST, temp);

SELECT name FROM create_hypertable('"conditions"', 'time', 'device_id');