--通过经纬度计算两点之间的距离 create  FUNCTION [dbo].[fnGetDistanceNew]   --LatBegin 开始经度 --LngBegin 开始维度 --29.490295,106.486654,29.615467, 106.581515 (@LatBegin1 varchar(128), @LngBegin1 varchar(128),@location varchar(128))      Returns real       ASBEGIN       --转换location字段,防止字段太长.影响SQL美观       declare  @LatBegin REAL       declare  @LngBegin REAL       declare  @LatEnd REAL       declare  @LngEnd REAL       set @LatBegin=Convert(real,@LatBegin1)       set @LngBegin=Convert(real,@LngBegin1)       set @LatEnd=Convert(real,SUBSTRING(@location,0,charindex(‘&‘,@location)))       set @LngEnd=Convert(real,SUBSTRING(@location,charindex(‘&‘,@location)+1,LEN(@location)))             --距离(千米)       DECLARE @Distance      REAL       DECLARE @EARTH_RADIUS  REAL       SET @EARTH_RADIUS = 6371.004       DECLARE @RadLatBegin  REAL,               @RadLatEnd    REAL,               @RadLatDiff   REAL,               @RadLngDiff   REAL                      SET @RadLatBegin = @LatBegin *PI()/ 180.0        SET @RadLatEnd = @LatEnd *PI()/ 180.0        SET @RadLatDiff = @RadLatBegin - @RadLatEnd        SET @RadLngDiff = @LngBegin *PI()/ 180.0 - @LngEnd *PI()/ 180.0        SET @Distance = 2 *ASIN(               SQRT(                   POWER(SIN(@RadLatDiff / 2), 2)+COS(@RadLatBegin)*COS(@RadLatEnd)                    *POWER(SIN(@RadLngDiff / 2), 2)               )       )                  SET @Distance = @Distance * @EARTH_RADIUS        SET @Distance = Round((@Distance * 10000) / 10000,5)       RETURN @Distance       END