Какую конструкцию использовать

SELECT Таблица1.id, Таблица1.pole1_gn, Таблица1.pole2_time
FROM Таблица1 INNER JOIN (SELECT pole1_gn, MAX(pole2_time) AS Max_Time FROM Таблица1 GROUP BY pole1_gn) AS QQ ON Таблица1.pole2_time=QQ.Max_Time

SELECT Таблица1.id, Таблица1.pole1_gn, Таблица1.pole2_time
FROM Таблица1 INNER JOIN (SELECT pole1_gn, MAX(pole2_time) AS Max_Time FROM Таблица1 GROUP BY pole1_gn)  AS QQ ON (Таблица1.pole1_gn = QQ.pole1_gn) AND (Таблица1.pole2_time = QQ.Max_Time);

$sql1="
SELECT
  a1.plate_recognized,
  a1.time_best,
  a1.lpr_id,
  a1.lpr_name,
  a1.lpr_type,
  a1.direction_name
FROM
  tobackup.t_log as a1
INNER JOIN (SELECT plate_recognized, MAX(time_best) AS Max_Time FROM tobackup.t_log GROUP BY plate_recognized) AS QQ
ON (a1.time_best=QQ.Max_Time) AND (a1.time_best = QQ.Max_Time)
 
 
WHERE
a1.plate_recognized NOT LIKE '%?%' and a1.country_standard='GOST1' and ";
 
 IF ($period==0) { $sql1=$sql1." date(a1.time_best)='$dataX1' ";}
 IF ($period==1) { $sql1=$sql1." date(a1.time_best)>='$dataX1' and date(a1.time_best)<='$dataX2' ";}
 $sql1=$sql1."  order by a1.time_best asc";