您不能在FROM子句中指定目标表的“位置”进行更新

Question

由于某种原因，我在MySql中收到错误：您无法在FROM子句中指定目标表的“位置”进行更新

UPDATE location 
SET 
    lat = 37.05,
    lng = - 122.05,
    power = 90,
    speed = 90,
    utc = '155',
    gmt = '156'
WHERE
    location.index IN (SELECT 
            MAX(location.index)
        FROM
            location
        WHERE
            location.truckid = '1480c667-0bc9-3c60-85f3-6de3b6cd5ad4');

我做错了什么？

Answer 1

尝试在子查询周围放置另一个SELECT。

UPDATE location 
       SET lat = 37.05,
           lng = -122.05,
           power = 90,
           speed = 90,
           utc = '155',
           gmt = '156'
       WHERE index = (SELECT index
                             FROM (SELECT max(index) index
                                          FROM location
                                          WHERE location.truckid = '1480c667-0bc9-3c60-85f3-6de3b6cd5ad4') x);