根据经纬度算距离 | SQL

--计算地球上两个坐标点（经度，纬度）之间距离sql函数CREATE FUNCTION [dbo].[fnGetDistance](@LatBegin REAL, @LngBegin REAL, @LatEnd REAL, @LngEnd REAL) RETURNS FLOAT  ASBEGIN  --距离(千米)  DECLARE @Distance REAL  DECLARE @EARTH_RADIUS REAL  SET @EARTH_RADIUS = 6378.137   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   RETURN @DistanceEND/*财富广场经度：114.02644397853898纬度：22.536917850961675光大银行经度:114.02633400796937纬度:22.537137898472157*/SELECT id,name,dbo.fnGetDistance(114.02633400796937,22.537137898472157,gislng,gislat) as 距离  FROM yx_nurseSELECT dbo.fnGetDistance(114.02633400796937,22.537137898472157,gislng,gislat) as 距离,yx_nurse.*  FROM yx_nurse WHERE dbo.fnGetDistance(114.02633400796937,22.537137898472157,gislng,gislat) < 0.100