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我有一个主表（说主表）和另一个临时表（说副本）。我想要做的是每个存储过程的平均值和标准偏差（有一堆以不同的版本号作为后缀，它们都必须被视为相同）从主表和更新 Temp 表的平均值和标准偏差为每个天。以下是我不工作的代码....

UPDATE @CopyOfMainTable AS copy
            SET copy.overall_count_average = AVG(main.overall_count),
                        copy.overall_count_stddev=StDev(main.overall_count),
                        copy.redundancy_count_average =AVG (main.redundancy_count),
                        copy.redundancy_count_stddev=StDev(main.redundancy_count),
                        copy.not_completed_count_average AVG(main.not_completed_count),
                        copy.not_completed_count_stddev=StDev(main.not_completed_count),
                        copy.session_count_average= AVG(main.session_count),
                        copy.session_count_stddev=StDev(main.session_count),
                        copy.per_session_count_average_average = AVG (main.per_session_count_avg),
                        copy.per_session_count_average_stddev = StDev(main.per_session_count_avg),
                        copy.per_session_count_max_average = AVG(main.per_session_count_max),
                        copy.per_session_count_max_stddev= StDev(main.per_session_count_max),
                        copy.per_session_count_stddev_average=AVG(main.per_session_count_stddev),
                        copy.per_session_count_stddev_stddev=StDev(main.per_session_count_stddev),
                        copy.run_time_average_average =  AVG(main.run_time_avg),
                        copy.run_time_average_stddev = StDev(main.run_time_avg),
                        copy.run_time_max_average =AVG(main.run_time_max),
                        copy.run_time_max_stddev= StDev(main.run_time_max),
                        copy.run_time_stddev_average=AVG(main.run_time_stddev),
                        copy.run_time_stddev_stddev=StDev(main.run_time_stddev),
                        copy.run_time_core_hours_avg_average=Avg(main.run_time_core_hours_avg),
                        copy.run_time_core_hours_avg_stddev=StDev(main.run_time_core_hours_avg),
                        copy.run_time_core_hours_max_average=Avg(main.run_time_core_hours_max),
                        copy.run_time_core_hours_max_stddev=StDev(main.run_time_core_hours_max),
                        copy.run_time_core_hours_stddev_average=Avg(main.run_time_core_hours_stddev),
                        copy.run_time_core_hours_stddev_stddev=StDev(main.run_time_core_hours_stddev),
                        copy.run_time_peak_hours_avg_average=Avg(main.run_time_peak_hours_avg),
                        copy.run_time_peak_hours_avg_stddev=StDev(main.run_time_peak_hours_avg),
                        copy.run_time_peak_hours_max_average=Avg(main.run_time_peak_hours_max),
                        copy.run_time_peak_hours_max_stddev=StDev(main.run_time_peak_hours_max),
                        copy.run_time_peak_hours_stddev_average=Avg(main.run_time_peak_hours_stddev),
                        copy.run_time_peak_hours_stddev_stddev=StDev(main.run_time_peak_hours_stddev),
                        copy.run_time_min_average=Avg(main.run_time_min),
                        copy.run_time_min_stddev=StDev(main.run_time_min),
                        copy.run_time_core_hours_min_average=Avg(main.run_time_core_hours_min),
                        copy.run_time_core_hours_min_stddev=StDev(main.run_time_core_hours_min),
                        copy.run_time_peak_hours_min_average=Avg(main.run_time_peak_hours_min),
                        copy.run_time_peak_hours_min_stddev=StDev(main.run_time_peak_hours_min)
            FROM dbo.database_call_tracking as main 
            WHERE(main.date < @latestDay_ToBeConsidered_Forthreshhold) AND (main.day_of_week BETWEEN 2 AND 6)  AND (main.database_call like '%'+copy.database_call+'%')--AND (main.database_call LIKE '%[_]v[1-9]%'
            Group by database_call

这根本不起作用。任何人都可以帮忙吗？或者可能会提出一些建议？

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1 回答 1

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通常，您需要针对这种情况使用子查询；这是一个简化的示例：

UPDATE #tmp
SET #tmp.SomeValue = x.SomeValue
FROM @MyTempTable #tmp
INNER JOIN (
    SELECT blah.SomeKey, SUM(blah.Whatever) as [SomeValue]
    /* some complex query */
    GROUP BY blah.SomeKey
) x ON #tmp.SomeKey = x.SomeKey
于 2009-08-17T21:04:52.640 回答