CREATE TABLE kraken_day (
  ts          BIGINT         NOT NULL PRIMARY KEY,
  open        NUMERIC(18,8)  NOT NULL,
  high        NUMERIC(18,8)  NOT NULL,
  low         NUMERIC(18,8)  NOT NULL,
  close       NUMERIC(18,8)  NOT NULL,
  vwap        NUMERIC(18,8)  NOT NULL,
  volume      NUMERIC(24,8)  NOT NULL,
  trade_count INTEGER        NOT NULL,
  created_at  TIMESTAMPTZ    NOT NULL DEFAULT NOW()
);