--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 AS BEGIN --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 @Distance END /* 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_nurse SELECT 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
时间: 2024-09-30 17:06:54