如何通过在MySQL/PHP

Question

计数查询滚动我有这个疑问：

select count(*) , (3959 * acos(cos(radians(34.469994)) * cos(radians(lat)) * cos(radians(lng) - radians(-118.196739)) + sin(radians(34.469994)) * sin(radians(lat)))) AS distance from users HAVING distance < 150 

这是应该在一定的纬度和经度150英里吸引用户。
如何获得计数（*）部分的数量？

此外，任何想法如何切换英里和公里之间的这种查询？

谢谢！

Answer 1

select count(*) as count, (3959 * acos(cos(radians(34.469994)) * cos(radians(lat)) * cos(radians(lng) - radians(-118.196739)) + sin(radians(34.469994)) * sin(radians(lat)))) AS distance from users HAVING distance < 150