Mysql s（）函数）如果您的表是MyISAM，则可以使用空间扩展： SELECT SQL_NO_CACHE DISTINCT geonameid, name, (6367.41 * SQRT(2 * (1-Cos(R

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s（）函数）如果您的表是

MyISAM

，则可以使用空间扩展：

SELECT SQL_NO_CACHE DISTINCT 
       geonameid, 
       name, 
       (6367.41 * SQRT(2 * (1-Cos(RADIANS(latitude)) * Cos(0.704231626533) * (Sin(RADIANS(longitude))*Sin(-0.0669560660943) + Cos(RADIANS(longitude)) * Cos(-0.0669560660943)) - Sin(RADIANS(latitude)) * Sin(0.704231626533)))) AS Distance 
  FROM geoNames 
 WHERE (6367.41 * SQRT(2 * (1 - Cos(RADIANS(latitude)) * Cos(0.704231626533) * (Sin(RADIANS(longitude)) * Sin(-0.0669560660943) + cos(RADIANS(longitude)) * Cos(-0.0669560660943)) - Sin(RADIANS(latitude)) * Sin(0.704231626533))) <= '10') 
ORDER BY Distance

CREATE VIEW geoNamesDistance AS
SELECT SQL_NO_CACHE DISTINCT 
       geonameid, 
       name, 
       (6367.41 * SQRT(2 * (1-Cos(RADIANS(latitude)) * Cos(0.704231626533) * (Sin(RADIANS(longitude))*Sin(-0.0669560660943) + Cos(RADIANS(longitude)) * Cos(-0.0669560660943)) - Sin(RADIANS(latitude)) * Sin(0.704231626533)))) AS Distance 
  FROM geoNames;

SELECT * FROM geoNamesDistance
WHERE Distance <= 10
ORDER BY Distance;

select * from retailer
where latitude is not null and longitude is not null
and pow(2*(latitude - ?), 2) + pow(longitude - ?, 2) < your_magic_distance_value