Question

我试图找到sqlite中一小时数据的最高60秒平均值。

这是我到目前为止所得到的：

SELECT MAX(SELECT AVG(watts) 
             FROM tblworkoutdata d2
            WHERE d2.workoutsummaryid = d1.workoutsummaryid 
              AND d2.ticks BETWEEN d1.ticks AND d1.ticks + 60)) AS theMax 
  FROM tblworkoutdata d1
 WHERE workoutsummaryid = 198

每个刻度线代表一秒钟。 “Watts”是我试图找到最高平均值的领域。 WorkoutSummaryID只代表锻炼。

上面的代码在sqlite中说太多括号。有谁知道如何在一个时间序列中获得最高的60秒平均值？

Answer 1

SELECT MAX((SELECT AVG(watts) 
             FROM tblworkoutdata d2
            WHERE d2.workoutsummaryid = d1.workoutsummaryid 
              AND d2.ticks BETWEEN d1.ticks AND d1.ticks + 60)) AS theMax 
  FROM tblworkoutdata d1
 WHERE workoutsummaryid = 198

Answer 2

你的陈述中确实有太多的右括号。您缺少子查询周围的左括号：

SELECT MAX((SELECT AVG(watts) 
            FROM tblworkoutdata d2
            WHERE d2.workoutsummaryid = d1.workoutsummaryid 
              AND d2.ticks BETWEEN d1.ticks AND d1.ticks + 60)) AS theMax 
FROM tblworkoutdata d1
WHERE workoutsummaryid = 198

SQLite - 时间序列中平均最高60秒？

2 个答案: