実行例 ::

  > select Comments --filter 'last_modified<=1268802000' --output_columns posted_by.name,comment,last_modified --drilldown hash_tags,posted_by
  [[0,1294292472.24623,0.000634424],[[[5],[["posted_by.name","ShortText"],["comment","ShortText"],["last_modified","Time"]],["hsiomaneki","マイクロブログ作ってみました（甘栗むいちゃいました的な感じで）。",1268795100.0],["グニャラくん","初の書き込み。テストテスト。",1268794800.0],["hsiomaneki","@tasukuchan ようこそ!!!",1268795100.0],["グニャラくん","@daijiro ありがとう！",1268798400.0],["グニャラくん","groongaなう #groonga",1268802000.0]],[[1],[["_key","ShortText"],["_nsubrecs","Int32"]],["groonga",1]],[[2],[["_key","ShortText"],["_nsubrecs","Int32"]],["daijiro",2],["tasukuchan",3]]]]
  