--查找数据库中5公里内的记录 仓经:120.675104 仓伟:31.320949 道路系数:1.5 SELECT * FROM (SELECT *,((6371.004*ACOS(SIN(31.320949/180*PI())*SIN(地纬/180*PI())+COS(31.320949/180*PI())*COS(地纬/180*PI())*COS((120.675104-地经)/180*PI())))*1.5) AS dis FROM 测试表) AS AA WHERE 到仓距离<=5
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函数写法
ALTER FUNCTION [GetDistance] ( @GPSLng DECIMAL(12,6), @GPSLat DECIMAL(12,6), @Lng DECIMAL(12,6), @Lat DECIMAL(12,6) ) RETURNS DECIMAL(12,4) AS BEGIN DECLARE @result DECIMAL(12,4) SELECT @result=6371.004*ACOS(SIN(@GPSLat/180*PI())*SIN(@Lat/180*PI())+COS(@GPSLat/180*PI())*COS(@Lat/180*PI())*COS((@GPSLng-@Lng)/180*PI())) RETURN @result END
//查找数据库中5公里内的记录 SELECT *,GetDistance(当期点的经度,当期点的纬度,经度字段,纬度字段) AS dis FROM TABLENAME WHERE dis<5