mysql 分组查每组里创建时间最大的那条数据

参考这个写：

SELECT *
FROM tb_slave_upload_data a
INNER JOIN (
SELECT c.locationID,MAX(c.addTime) AS ADDTIME
FROM tb_slave_upload_data c
WHERE c.isDelete=0
GROUP BY c.locationID
) b ON (a.locationID=b.locationID AND b.addTime=a.addTime)
WHERE a.isDelete=0
;