2009-02-05

• 原本想說要把 location1 跟 location2 裡的資料切成 lat1, lng1, lat2, lng2，做好之後才發現原來國榮已經做了 maincase_new 的整理，因此接下來就先分析一下資料。

  SELECT data_type.serial AS type_id, data_type.name AS
  TYPE , maincase_new.owner_org, maincase_new.name, maincase_new.description, maincase_new.loc1_lon, maincase_new.loc1_lat, maincase_new.website, maincase_new.start_time
  FROM data_type, maincase_new, maincase_detail
  WHERE maincase_detail.maincase_id = maincase_new.serial
  AND maincase_detail.type_id = data_type.serial
  ORDER BY type_id, owner_org, loc1_lon, loc1_lat;
  

• 資料拓墣

  SELECT DISTINCT data_type.serial AS type_id, data_type.parent_id, data_type.name AS
  TYPE , maincase_new.owner_org
  FROM data_type, maincase_new, maincase_detail
  WHERE maincase_detail.maincase_id = maincase_new.serial
  AND maincase_detail.type_id = data_type.serial
  ORDER BY type_id, owner_org
  

  
• 現有資料經緯度範圍

  SELECT max( loc1_lon ) , max( loc1_lat ) , max( loc2_lon ) , max( loc2_lat ) , min( loc1_lon ) , min( loc1_lat ) , min( loc2_lon ) , min( loc2_lat )
  FROM maincase_new
  WHERE loc1_lon >0 AND loc1_lat >0
  

max(loc1_lon)	max(loc1_lat)	max(loc2_lon)	max(loc2_lat)	min(loc1_lon)	min(loc1_lat)	min(loc2_lon)	min(loc2_lat)
123.60018	35.41830	123.60018	35.41830	106.51300	1.98380	106.51300	1.98380