我有一个查询,选择GPS点30英里范围内的所有位置。我希望获得这些地点的身份,但它也会从中心返回距离。
无论如何都要进行距离计算而不返回它?
查询:
SELECT id, 3956 * 2 * ASIN(SQRT(
POWER(SIN((34.1844709 - abs(dest.lat)) * pi()/180 / 2),
2) + COS(37.7749295 * pi()/180 ) * COS(abs(dest.lat) *
pi()/180) * POWER(SIN((-118.131809 - dest.lng) *
pi()/180 / 2), 2) )) as distance
FROM location dest
having distance < 30
ORDER by distance
LIMIT 30
输出:
---------------------------
id | distance
---------------------------
1 | 2.310
2 | 2.356
17 | 4.298
基于查询: http://www.notaires.fr/sites/default/files/geo_searchjkkjkj_0.pdf
答案 0 :(得分:5)
你能再做一次选择吗?
Select id
From (SELECT id, 3956 * 2 * ASIN(SQRT(
POWER(SIN((34.1844709 - abs(dest.lat)) * pi()/180 / 2),
2) + COS(37.7749295 * pi()/180 ) * COS(abs(dest.lat) *
pi()/180) * POWER(SIN((-118.131809 - dest.lng) *
pi()/180 / 2), 2) )) as distance
FROM location dest
having distance < 30
ORDER by distance
LIMIT 30) dst