在MySQL中生成随机经度和纬度

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我试图在MySQL中生成一些虚拟记录,并且需要在给定范围内创建随机纬度和经度浮点值。

例如,我需要生成介于52.077090052913654和52.477040512464626之间的纬度和介于-1.8840792500000134和-0.9172823750000134之间的经度

我熟悉使用Rand Floor创建随机数范围,但这只会产生整数,我怎么可能这样做?

您可以使用RAND()两个值之间的随机值,如下所示:

randVal = (RAND() * (maxVal - minVal)) + minVal

生成随机经纬度:

SELECT 
    (RAND() * (52.477040512464626 - 52.077090052913654)) + 52.077090052913654 AS randlatitude,
    (RAND() * (-0.9172823750000134 - -1.8840792500000134)) + -1.8840792500000134 AS randlongitude

拼接在一起:

SELECT concat(((RAND() * (-0.9172823750000134 - -1.8840792500000134)) + -1.8840792500000134),",",((RAND() * (52.477040512464626 - 52.077090052913654)) + 52.077090052913654)) AS LngLat

更新业务字段实例:

UPDATE iot_device set lat_lng_baidu= (SELECT concat(((RAND() * (119.205056 - 2.105056)) + -2.105056),",",((RAND() * (52.477040512464626 - 10.659333)) + 10.659333)))