SELECT  idhl_req_path ,
					idhl_req_type ,
					MAX(idhl_req_time) idhl_req_time
	FROM    IOT_DEVICE_HTTP_LOG
	WHERE    idhl_req_time BETWEEN ?
	AND     ?
	GROUP BY idhl_req_path ,
					idhl_req_type

需要给 max 字段使用一个别名

SELECT  idhl_req_path ,
					idhl_req_type ,
					MAX(idhl_req_time) idhl_req_time_max
	FROM    IOT_DEVICE_HTTP_LOG
	WHERE    idhl_req_time BETWEEN ?
	AND     ?
	GROUP BY idhl_req_path ,
					idhl_req_type

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