问题描述

我在尝试执行以下查询时收到此错误.有什么想法或建议吗?

I am receiving this error when trying to execute the query below. Any ideas or suggestions?

错误:

在包含外部引用的聚合表达式中指定了多个列.如果聚合的表达式包含外部引用，则该外部引用必须是表达式中唯一引用的列.

Multiple columns are specified in an aggregated expression containing an outer reference. If an expression being aggregated contains an outer reference, then that outer reference must be the only column referenced in the expression.

SELECT TestInstances.pkTestInstanceID AS 'pkTestInstanceID',
               bands.pkPerformanceLevelReportBandID AS 'BandID',
               bands.StackPosition AS 'StackPosition',
               (SELECT TOP 100 PERCENT SUM(CASE WHEN bands.StackPosition = b.StackPosition THEN 1 ELSE 0 END) * 100/ CASE WHEN COUNT(StudentScores_Subject.pkStudentScoreID) = 0 THEN 1 ELSE COUNT(StudentScores_Subject.pkStudentScoreID) END
                FROM PerformanceLevelReportBands b 
                WHERE b.fkPerformanceLevelReportID = @intPerfLevelReportId
                ORDER BY SUM(CASE WHEN bands.StackPosition = b.StackPosition THEN 1 ELSE 0 END) * 100/ CASE WHEN COUNT(StudentScores_Subject.pkStudentScoreID) = 0 THEN 1 ELSE COUNT(StudentScores_Subject.pkStudentScoreID) END) AS 'Percent',
         COUNT(StudentScores_Subject.pkStudentScoreID) AS 'Count'
         FROM StudentScores_Subject
                INNER JOIN StudentTests ON StudentScores_Subject.fkStudentTestID = StudentTests.pkStudentTestID
                INNER JOIN TestInstances ON  TestInstances.pkTestInstanceID = StudentTests.fkTestInstanceID
                INNER JOIN CAHSEE_TestPeriods ON CAHSEE_TestPeriods.pkTestPeriodID = TestInstances.fkTestPeriodID
                INNER JOIN PerformanceLevelReportBands bands ON bands.fkPerformanceLevelReportID = @intPerfLevelReportId
                LEFT JOIN MMARS_Web_TestInfo_California.dbo.PerfLevelReportBandCutScores cutScores ON cutScores.fkPerformanceLevelReportBandID = bands.pkPerformanceLevelReportBandID
                    AND cutScores.fkGradeID = @intGradeId
                    AND cutScores.fkTestSubjectID IN (SELECT id FROM @tempSubs)
                INNER JOIN PerfLevelReportBandComponents bandComponents ON bandComponents.fkPerformanceLevelReportBandID = bands.pkPerformanceLevelReportBandID 
                    AND((bandComponents.ScoreValue = StudentScores_Subject.ScoreValue) OR 
                        ((CAST(StudentScores_Subject.ScoreValue AS INT) BETWEEN bandComponents.minScore and bandComponents.maxScore)
                          OR 
                         (CAST(StudentScores_Subject.ScoreValue AS INT) BETWEEN cutScores.minScore and cutScores.maxScore)))
                RIGHT JOIN MM_SchoolYears ON MM_SchoolYears.pkSchoolYearID = TestInstances.fkSchoolYearID
        WHERE MM_SchoolYears.pkSchoolYearID IN (SELECT number FROM itot(@strYearIds, N','))
                AND StudentScores_Subject.fkStudentTestID IN (SELECT id FROM @tempTests)
                AND StudentScores_Subject.fkScoreTypeID = bandComponents.fkScoreTypeID
                AND StudentScores_Subject.fkTest_SubjectID IN (SELECT id FROM @tempSubs)
        GROUP BY TestInstances.pkTestInstanceID, bands.pkPerformanceLevelReportBandID, bands.StackPosition
        ORDER BY TestInstances.pkTestInstanceID, bands.pkPerformanceLevelReportBandID, bands.StackPosition

推荐答案

这里的问题是你不能在聚合函数中组合外部和内部引用

The problem is here you can't combine an outer and inner reference in an aggregate function

(SELECT TOP 100 PERCENT SUM(CASE WHEN bands.StackPosition = b.StackPosition THEN 1 ELSE 0 END) * 100/ CASE
                                                                                                             
WHEN COUNT(StudentScores_Subject.pkStudentScoreID) = 0 THEN 1
                                                                                                            
ELSE COUNT(StudentScores_Subject.pkStudentScoreID)
                                                                                                        
 END
   FROM PerformanceLevelReportBands b
   WHERE b.fkPerformanceLevelReportID = @intPerfLevelReportId
   ORDER BY SUM(CASE WHEN bands.StackPosition = b.StackPosition THEN 1 ELSE 0 END) * 100/ CASE
                                                                                              
WHEN COUNT(StudentScores_Subject.pkStudentScoreID) = 0 THEN 1
                                                                                              
ELSE COUNT(StudentScores_Subject.pkStudentScoreID)
                                                                                          
END) AS 'Percent'

所以改成

(SELECT TOP 100 PERCENT SUM(CASE WHEN bb.StackPosition = b.StackPosition THEN 1 ELSE 0 END) * 100/ CASE
                                                                                                            
  WHEN COUNT(StudentScores_Subject.pkStudentScoreID) = 0 THEN 1
                                                                                                            
  ELSE COUNT(StudentScores_Subject.pkStudentScoreID)
                                                                                                        
 END
   FROM PerformanceLevelReportBands b JOIN PerformanceLevelReportBands bb
    ON bb.fkPerformanceLevelReportID =bands.fkPerformanceLevelReportID 
    AND b.fkPerformanceLevelReportID =bb.fkPerformanceLevelReportID
   WHERE b.fkPerformanceLevelReportID = @intPerfLevelReportId
   ORDER BY SUM(CASE WHEN bb.StackPosition = b.StackPosition THEN 1 ELSE 0 END) * 100/ CASE
                                                                                              
 WHEN COUNT(StudentScores_Subject.pkStudentScoreID) = 0 THEN 1
                                                                                              
 ELSE COUNT(StudentScores_Subject.pkStudentScoreID)
                                                                                          
 END) AS 'Percent'

这里有更详细的详细解释.

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