mysql中使用sql找出每組當中最大的那條數據

統計每組中平均執行時間最長的URL的數據sql 寫法一：url select A.url,A.count,A.sumtime,A.avgtime,A.addtime from baas_system_log A inner join (select addtime, max(avgtime) as avgtime from baas_system_log group by addtime) B

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