Question

我在Stream Analytics中使用了两个子查询，因此我可以运行两个AzureML函数。

WITH subquery as (
    SELECT
        id as id,
        username as username,
        try_cast(startTime as datetime) as startTime,
        try_cast(endTime as datetime) as endTime,
        AC as AC, FM as FM, UC as UC, 
        DL as DL, DS as DS, DP as DP,
        LB as LB, ASTV as ASTV, MSTV as MSTV,
        ALTV as ALTV, MLTV as MLTV, Width as Width,
        Min as Min, Max as Max, Nmax as Nmax,
        Nzeros as Nzeros, Mode as Mode, Mean as Mean,
        Median as Median, Variance as Variance, Tendency as Tendency,
        rms,fmed,fpeak,sample_entropy,
        EventProcessedUtcTime as EventProcessedUtcTime,
        Distress(AC,FM,UC,DL,DS,DP,1,LB,ASTV,MSTV,ALTV,MLTV,
            Width,Min,Max,Nmax,Nzeros,Mode,Mean,Median,Variance,
            Tendency,1,1,1,1,1,1,1,1,1,1,1,1) as resultFHR
    FROM
        iot
    ),
subquery2 as (
    SELECT
        id as id,
        try_cast(startTime as datetime) as startTime,
        try_cast(endTime as datetime) as endTime,
        AC as AC, FM as FM, UC as UC, 
        DL as DL, DS as DS, DP as DP,
        LB as LB, ASTV as ASTV, MSTV as MSTV,
        ALTV as ALTV, MLTV as MLTV, Width as Width,
        Min as Min, Max as Max, Nmax as Nmax,
        Nzeros as Nzeros, Mode as Mode, Mean as Mean,
        Median as Median, Variance as Variance, Tendency as Tendency,
        rms,fmed,fpeak,sample_entropy,
        EventProcessedUtcTime as EventProcessedUtcTime,
        Labour("",1,1,1,"",rms,fmed,fpeak,sample_entropy,"","") as resultUC
    FROM
        iot
    )

SELECT
    id as id,
    username as username,
    startTime as startTime,
    endTime as endTime,
    AC as AC, FM as FM, UC as UC, 
    DL as DL, DS as DS, DP as DP,
    LB as LB, ASTV as ASTV, MSTV as MSTV,
    ALTV as ALTV, MLTV as MLTV, Width as Width,
    Min as Min, Max as Max, Nmax as Nmax,
    Nzeros as Nzeros, Mode as Mode, Mean as Mean,
    Median as Median, Variance as Variance, Tendency as Tendency,
    EventProcessedUtcTime as EventProcessedUtcTime,
    resultFHR.[classes] as distress,
    resultFHR.[probabilities] as distressProbability,
    resultUC.[classes] as labour,
    resultUC.[probabilities] as labourProbability
INTO
    sql
FROM
    subquery INNER JOIN subquery2 ON subquery.id = subquery2.id 
    AND DATEDIFF(second, subquery, subquery2) BETWEEN 0 AND 20


SELECT
    *
INTO
    c2d
FROM
    subquery INNER JOIN subquery2 ON subquery.id = subquery2.id 
    AND DATEDIFF(second, subquery, subquery2) BETWEEN 0 AND 20

我尝试使用Inner Join来连接两个子查询，但它适用于第二个查询，不适用于第一个查询。当我在第一个查询中使用内部联接时，它将显示错误。

列名无效：＆＃39; id＆＃39;。具有此类名称的列不存在。

任何解决方案？

Answer 1

由于您加入了两个来源subquery和subquery2，因此您需要像使用ON子句（subquery.id = subquery2.id）那样使用源名称限定列。

只有当您拥有单一来源时，才允许使用非限定名称，例如subquery步骤中。

更改列引用以完全限定它们，如下所示： SELECT subquery.id as id, subquery.username as username, subquery.startTime as startTime, subquery.endTime as endTime, ...

流分析：内部加入两个子查询

1 个答案: