02 2018 档案

oracle如何查询分区表所占空间大小
摘要：select bytes/1024/1024 from user_segments where segment_type='TABLE PARTITION' and segment_name =upper('表明')order by bytes desc; 阅读全文
posted @ 2018-02-08 11:57 桎梏110 阅读(1007) 评论(0) 推荐(0)
经纬度和墨卡托坐标相互转换
摘要：//经纬度转墨卡托 public void loc_to_mercator(double lon, double lat,ref double miX,ref double minY) { double x = lon; double y = Math.Log(Math.Tan((lat / 180 * Math.PI + Math... 阅读全文
posted @ 2018-02-05 20:48 桎梏110 阅读(537) 评论(0) 推荐(0)