[英]SQL needed Microsoft Office Access to determine percentiles for seperate repeating records
我有一个化工厂的数据库，其中包含在一年中提取和分析的所有样本。 它包含一个Date （采样日期）， Point （采样位置）， Report （测试了哪种化学物质）和一个Values （实验室结果）字段。
Points字段具有30条记录，这些记录在1年的时间内连续重复。 每次重复的所有记录都有相同的Date条目。
我需要在Report为“氨”的年份的整个期间内，为每个 “点”字段记录找到第75和第95个百分位Values 。 75th Percentile表示75％的数据条目的百分位数值或更低。
最佳尝试来自：
SELECT Point, Max(Values)
FROM Table
WHERE Values In(
SELECT TOP 75 PERCENT Values
FROM Table
WHERE Report = "Ammonia"
ORDER BY Values ASC
)
GROUP BY Point;
但这会产生意想不到的结果，因为给出的结果是所有数据的前75％，而不是每个Point 。
最终输出应为 ：
Point_1 75th_1
Point_2 75th_2
Point_3 75th_3
...
Point_30 75th_30
应当指出的是，数据的不一致之处在于，有些日子只采样了29或24个点，而每2或3天就进行了一次采样，从来没有在模式内进行。
Date;Point;Report;Values
2013-11-25 00:00:00;"HARTE_ANX1";"Ammonia";10,40
2013-11-25 00:00:00;"HARTE_ANX1";"Chlorides";0,00
2013-11-25 00:00:00;"HARTE_ANX1";"COD";106,00
2013-11-25 00:00:00;"HARTE_ANX1";"Conductivity";0,00
2013-11-25 00:00:00;"HARTE_ANX1";"MLSS";2856,00
2013-11-25 00:00:00;"HARTE_ANX1";"NOX";0,10
2013-11-25 00:00:00;"HARTE_ANX1";"pH";6,90
2013-11-25 00:00:00;"HARTE_ANX1";"PO4";0,00
2013-11-25 00:00:00;"HARTE_ANX2";"Ammonia";11,20
2013-11-25 00:00:00;"HARTE_ANX2";"Chlorides";0,00
2013-11-25 00:00:00;"HARTE_ANX2";"COD";129,00
2013-11-25 00:00:00;"HARTE_ANX2";"Conductivity";0,00
2013-11-25 00:00:00;"HARTE_ANX2";"MLSS";2834,00
2013-11-25 00:00:00;"HARTE_ANX2";"NOX";0,30
2013-11-25 00:00:00;"HARTE_ANX2";"pH";6,90
2013-11-25 00:00:00;"HARTE_ANX2";"PO4";0,00
2013-11-25 00:00:00;"HARTE_ANX3";"Ammonia";10,20
2013-11-25 00:00:00;"HARTE_ANX3";"Chlorides";0,00
2013-11-25 00:00:00;"HARTE_ANX3";"COD";111,00
2013-11-25 00:00:00;"HARTE_ANX3";"Conductivity";0,00
2013-11-25 00:00:00;"HARTE_ANX3";"MLSS";3128,00
2013-11-25 00:00:00;"HARTE_ANX3";"NOX";0,20
2013-11-25 00:00:00;"HARTE_ANX3";"pH";6,90
2013-11-25 00:00:00;"HARTE_ANX3";"PO4";0,00
2013-11-25 00:00:00;"HARTE_ANX4";"Ammonia";10,20
2013-11-25 00:00:00;"HARTE_ANX4";"Chlorides";0,00
2013-11-25 00:00:00;"HARTE_ANX4";"COD";121,00
2013-11-25 00:00:00;"HARTE_ANX4";"Conductivity";0,00
2013-11-25 00:00:00;"HARTE_ANX4";"MLSS";3358,00
2013-11-25 00:00:00;"HARTE_ANX4";"NOX";0,50
2013-11-25 00:00:00;"HARTE_ANX4";"pH";6,90
2013-11-25 00:00:00;"HARTE_ANX4";"PO4";0,00
2013-11-25 00:00:00;"HARTE_FINAL_CONT";"Ammonia";0,40
2013-11-25 00:00:00;"HARTE_FINAL_CONT";"Chlorides";0,00
2013-11-25 00:00:00;"HARTE_FINAL_CONT";"COD";56,00
2013-11-25 00:00:00;"HARTE_FINAL_CONT";"Conductivity";62,00
2013-11-25 00:00:00;"HARTE_FINAL_CONT";"MLSS";0,00
2013-11-25 00:00:00;"HARTE_FINAL_CONT";"NOX";4,20
2013-11-25 00:00:00;"HARTE_FINAL_CONT";"pH";6,90
2013-11-25 00:00:00;"HARTE_FINAL_CONT";"PO4";0,10
2013-11-25 00:00:00;"HARTE_FINAL1";"Ammonia";0,00
2013-11-25 00:00:00;"HARTE_FINAL1";"Chlorides";0,00
2013-11-25 00:00:00;"HARTE_FINAL1";"COD";48,00
2013-11-25 00:00:00;"HARTE_FINAL1";"Conductivity";57,00
2013-11-25 00:00:00;"HARTE_FINAL1";"MLSS";0,00
2013-11-25 00:00:00;"HARTE_FINAL1";"NOX";4,90
2013-11-25 00:00:00;"HARTE_FINAL1";"pH";7,20
2013-11-25 00:00:00;"HARTE_FINAL1";"PO4";0,00
2013-11-25 00:00:00;"HARTE_FINAL2";"Ammonia";0,70
2013-11-25 00:00:00;"HARTE_FINAL2";"Chlorides";0,00
2013-11-25 00:00:00;"HARTE_FINAL2";"COD";40,00
2013-11-25 00:00:00;"HARTE_FINAL2";"Conductivity";57,00
2013-11-25 00:00:00;"HARTE_FINAL2";"MLSS";0,00
2013-11-25 00:00:00;"HARTE_FINAL2";"NOX";6,10
2013-11-25 00:00:00;"HARTE_FINAL2";"pH";7,30
2013-11-25 00:00:00;"HARTE_FINAL2";"PO4";0,00
2013-11-25 00:00:00;"HARTE_FINAL3";"Ammonia";0,00
2013-11-25 00:00:00;"HARTE_FINAL3";"Chlorides";0,00
2013-11-25 00:00:00;"HARTE_FINAL3";"COD";87,00
2013-11-25 00:00:00;"HARTE_FINAL3";"Conductivity";57,00
2013-11-25 00:00:00;"HARTE_FINAL3";"MLSS";0,00
2013-11-25 00:00:00;"HARTE_FINAL3";"NOX";3,50
2013-11-25 00:00:00;"HARTE_FINAL3";"pH";7,00
2013-11-25 00:00:00;"HARTE_FINAL3";"PO4";0,20
2013-11-25 00:00:00;"HARTE_FINAL4";"Ammonia";0,10
2013-11-25 00:00:00;"HARTE_FINAL4";"Chlorides";0,00
2013-11-25 00:00:00;"HARTE_FINAL4";"COD";59,00
2013-11-25 00:00:00;"HARTE_FINAL4";"Conductivity";55,00
2013-11-25 00:00:00;"HARTE_FINAL4";"MLSS";0,00
2013-11-25 00:00:00;"HARTE_FINAL4";"NOX";4,00
2013-11-25 00:00:00;"HARTE_FINAL4";"pH";7,30
2013-11-25 00:00:00;"HARTE_FINAL4";"PO4";0,00
2013-11-25 00:00:00;"HARTE_PRIM_REAC1";"Ammonia";0,50
2013-11-25 00:00:00;"HARTE_PRIM_REAC1";"Chlorides";0,00
2013-11-25 00:00:00;"HARTE_PRIM_REAC1";"COD";56,00
2013-11-25 00:00:00;"HARTE_PRIM_REAC1";"Conductivity";0,00
2013-11-25 00:00:00;"HARTE_PRIM_REAC1";"MLSS";3272,00
2013-11-25 00:00:00;"HARTE_PRIM_REAC1";"NOX";2,30
2013-11-25 00:00:00;"HARTE_PRIM_REAC1";"pH";6,90
2013-11-25 00:00:00;"HARTE_PRIM_REAC1";"PO4";6,30
2013-11-25 00:00:00;"HARTE_PRIM_REAC2";"Ammonia";3,00
2013-11-25 00:00:00;"HARTE_PRIM_REAC2";"Chlorides";0,00
2013-11-25 00:00:00;"HARTE_PRIM_REAC2";"COD";55,00
2013-11-25 00:00:00;"HARTE_PRIM_REAC2";"Conductivity";0,00
2013-11-25 00:00:00;"HARTE_PRIM_REAC2";"MLSS";2504,00
2013-11-25 00:00:00;"HARTE_PRIM_REAC2";"NOX";1,60
2013-11-25 00:00:00;"HARTE_PRIM_REAC2";"pH";6,90
2013-11-25 00:00:00;"HARTE_PRIM_REAC2";"PO4";11,00
2013-11-25 00:00:00;"HARTE_PRIM_REAC3";"Ammonia";0,10
2013-11-25 00:00:00;"HARTE_PRIM_REAC3";"Chlorides";0,00
2013-11-25 00:00:00;"HARTE_PRIM_REAC3";"COD";60,00
2013-11-25 00:00:00;"HARTE_PRIM_REAC3";"Conductivity";0,00
2013-11-25 00:00:00;"HARTE_PRIM_REAC3";"MLSS";2818,00
2013-11-25 00:00:00;"HARTE_PRIM_REAC3";"NOX";3,20
2013-11-25 00:00:00;"HARTE_PRIM_REAC3";"pH";6,90
2013-11-25 00:00:00;"HARTE_PRIM_REAC3";"PO4";6,50
2013-11-25 00:00:00;"HARTE_PRIM_REAC4";"Ammonia";0,40
2013-11-25 00:00:00;"HARTE_PRIM_REAC4";"Chlorides";0,00
2013-11-25 00:00:00;"HARTE_PRIM_REAC4";"COD";58,00
2013-11-25 00:00:00;"HARTE_PRIM_REAC4";"Conductivity";0,00
2013-11-25 00:00:00;"HARTE_PRIM_REAC4";"MLSS";2792,00
2013-11-25 00:00:00;"HARTE_PRIM_REAC4";"NOX";3,00
2013-11-25 00:00:00;"HARTE_PRIM_REAC4";"pH";6,90
2013-11-25 00:00:00;"HARTE_PRIM_REAC4";"PO4";6,10
2013-11-25 00:00:00;"HARTE_PST1";"Ammonia";23,10
2013-11-25 00:00:00;"HARTE_PST1";"Chlorides";0,00
2013-11-25 00:00:00;"HARTE_PST1";"COD";974,00
2013-11-25 00:00:00;"HARTE_PST1";"Conductivity";0,00
2013-11-25 00:00:00;"HARTE_PST1";"MLSS";0,00
2013-11-25 00:00:00;"HARTE_PST1";"NOX";0,00
2013-11-25 00:00:00;"HARTE_PST1";"pH";6,90
2013-11-25 00:00:00;"HARTE_PST1";"PO4";5,60
2013-11-25 00:00:00;"HARTE_PST2";"Ammonia";22,00
2013-11-25 00:00:00;"HARTE_PST2";"Chlorides";0,00
2013-11-25 00:00:00;"HARTE_PST2";"COD";1077,00
2013-11-25 00:00:00;"HARTE_PST2";"Conductivity";0,00
2013-11-25 00:00:00;"HARTE_PST2";"MLSS";0,00
2013-11-25 00:00:00;"HARTE_PST2";"NOX";0,00
2013-11-25 00:00:00;"HARTE_PST2";"pH";6,90
2013-11-25 00:00:00;"HARTE_PST2";"PO4";5,10
2013-11-25 00:00:00;"HARTE_PST3";"Ammonia";20,90
2013-11-25 00:00:00;"HARTE_PST3";"Chlorides";0,00
2013-11-25 00:00:00;"HARTE_PST3";"COD";1099,00
2013-11-25 00:00:00;"HARTE_PST3";"Conductivity";0,00
2013-11-25 00:00:00;"HARTE_PST3";"MLSS";0,00
2013-11-25 00:00:00;"HARTE_PST3";"NOX";0,00
2013-11-25 00:00:00;"HARTE_PST3";"pH";6,90
2013-11-25 00:00:00;"HARTE_PST3";"PO4";5,10
2013-11-25 00:00:00;"HARTE_PST4";"Ammonia";21,60
2013-11-25 00:00:00;"HARTE_PST4";"Chlorides";0,00
2013-11-25 00:00:00;"HARTE_PST4";"COD";1070,00
2013-11-25 00:00:00;"HARTE_PST4";"Conductivity";0,00
2013-11-25 00:00:00;"HARTE_PST4";"MLSS";0,00
2013-11-25 00:00:00;"HARTE_PST4";"NOX";0,00
2013-11-25 00:00:00;"HARTE_PST4";"pH";6,90
2013-11-25 00:00:00;"HARTE_PST4";"PO4";5,30
2013-11-25 00:00:00;"HARTE_RAW";"Ammonia";19,10
2013-11-25 00:00:00;"HARTE_RAW";"Chlorides";0,00
2013-11-25 00:00:00;"HARTE_RAW";"COD";2270,00
2013-11-25 00:00:00;"HARTE_RAW";"Conductivity";63,00
2013-11-25 00:00:00;"HARTE_RAW";"MLSS";0,00
2013-11-25 00:00:00;"HARTE_RAW";"NOX";0,00
2013-11-25 00:00:00;"HARTE_RAW";"pH";6,60
2013-11-25 00:00:00;"HARTE_RAW";"PO4";5,20
2013-11-25 00:00:00;"HARTE_SEC_REAC1";"Ammonia";0,10
2013-11-25 00:00:00;"HARTE_SEC_REAC1";"Chlorides";0,00
2013-11-25 00:00:00;"HARTE_SEC_REAC1";"COD";59,00
2013-11-25 00:00:00;"HARTE_SEC_REAC1";"Conductivity";0,00
2013-11-25 00:00:00;"HARTE_SEC_REAC1";"MLSS";2802,00
2013-11-25 00:00:00;"HARTE_SEC_REAC1";"NOX";2,60
2013-11-25 00:00:00;"HARTE_SEC_REAC1";"pH";6,90
2013-11-25 00:00:00;"HARTE_SEC_REAC1";"PO4";5,70
2013-11-25 00:00:00;"HARTE_SEC_REAC2";"Ammonia";0,10
2013-11-25 00:00:00;"HARTE_SEC_REAC2";"Chlorides";0,00
2013-11-25 00:00:00;"HARTE_SEC_REAC2";"COD";65,00
2013-11-25 00:00:00;"HARTE_SEC_REAC2";"Conductivity";0,00
2013-11-25 00:00:00;"HARTE_SEC_REAC2";"MLSS";2896,00
2013-11-25 00:00:00;"HARTE_SEC_REAC2";"NOX";3,20
2013-11-25 00:00:00;"HARTE_SEC_REAC2";"pH";6,90
2013-11-25 00:00:00;"HARTE_SEC_REAC2";"PO4";5,60
2013-11-25 00:00:00;"HARTE_SEC_REAC3";"Ammonia";0,30
2013-11-25 00:00:00;"HARTE_SEC_REAC3";"Chlorides";0,00
2013-11-25 00:00:00;"HARTE_SEC_REAC3";"COD";64,00
2013-11-25 00:00:00;"HARTE_SEC_REAC3";"Conductivity";0,00
2013-11-25 00:00:00;"HARTE_SEC_REAC3";"MLSS";3412,00
2013-11-25 00:00:00;"HARTE_SEC_REAC3";"NOX";3,70
2013-11-25 00:00:00;"HARTE_SEC_REAC3";"pH";6,90
2013-11-25 00:00:00;"HARTE_SEC_REAC3";"PO4";4,80
2013-11-25 00:00:00;"HARTE_SEC_REAC4";"Ammonia";0,60
2013-11-25 00:00:00;"HARTE_SEC_REAC4";"Chlorides";0,00
2013-11-25 00:00:00;"HARTE_SEC_REAC4";"COD";66,00
2013-11-25 00:00:00;"HARTE_SEC_REAC4";"Conductivity";0,00
2013-11-25 00:00:00;"HARTE_SEC_REAC4";"MLSS";3208,00
2013-11-25 00:00:00;"HARTE_SEC_REAC4";"NOX";3,10
2013-11-25 00:00:00;"HARTE_SEC_REAC4";"pH";7,00
2013-11-25 00:00:00;"HARTE_SEC_REAC4";"PO4";5,10
2013-11-26 00:00:00;"HARTE_FINAL_CONT";"Ammonia";2,60
2013-11-26 00:00:00;"HARTE_FINAL_CONT";"Chlorides";0,00
2013-11-26 00:00:00;"HARTE_FINAL_CONT";"COD";69,00
2013-11-26 00:00:00;"HARTE_FINAL_CONT";"Conductivity";74,00
2013-11-26 00:00:00;"HARTE_FINAL_CONT";"MLSS";0,00
2013-11-26 00:00:00;"HARTE_FINAL_CONT";"NOX";3,00
2013-11-26 00:00:00;"HARTE_FINAL_CONT";"pH";7,70
2013-11-26 00:00:00;"HARTE_FINAL_CONT";"PO4";0,50
2013-11-26 00:00:00;"HARTE_FINAL1";"Ammonia";3,90
2013-11-26 00:00:00;"HARTE_FINAL1";"Chlorides";0,00
2013-11-26 00:00:00;"HARTE_FINAL1";"COD";79,00
2013-11-26 00:00:00;"HARTE_FINAL1";"Conductivity";75,00
2013-11-26 00:00:00;"HARTE_FINAL1";"MLSS";0,00
2013-11-26 00:00:00;"HARTE_FINAL1";"NOX";0,00
2013-11-26 00:00:00;"HARTE_FINAL1";"pH";7,60
2013-11-26 00:00:00;"HARTE_FINAL1";"PO4";1,00
2013-11-26 00:00:00;"HARTE_FINAL2";"Ammonia";4,30
2013-11-26 00:00:00;"HARTE_FINAL2";"Chlorides";0,00
2013-11-26 00:00:00;"HARTE_FINAL2";"COD";73,00
2013-11-26 00:00:00;"HARTE_FINAL2";"Conductivity";73,00
2013-11-26 00:00:00;"HARTE_FINAL2";"MLSS";0,00
2013-11-26 00:00:00;"HARTE_FINAL2";"NOX";0,00
2013-11-26 00:00:00;"HARTE_FINAL2";"pH";7,50
2013-11-26 00:00:00;"HARTE_FINAL2";"PO4";0,60
2013-11-26 00:00:00;"HARTE_FINAL4";"Ammonia";0,00
2013-11-26 00:00:00;"HARTE_FINAL4";"Chlorides";0,00
2013-11-26 00:00:00;"HARTE_FINAL4";"COD";65,00
2013-11-26 00:00:00;"HARTE_FINAL4";"Conductivity";70,00
2013-11-26 00:00:00;"HARTE_FINAL4";"MLSS";0,00
2013-11-26 00:00:00;"HARTE_FINAL4";"NOX";7,90
2013-11-26 00:00:00;"HARTE_FINAL4";"pH";7,60
2013-11-26 00:00:00;"HARTE_FINAL4";"PO4";0,00
2013-11-26 00:00:00;"HARTE_RAW";"Ammonia";19,30
2013-11-26 00:00:00;"HARTE_RAW";"Chlorides";0,00
2013-11-26 00:00:00;"HARTE_RAW";"COD";1261,00
2013-11-26 00:00:00;"HARTE_RAW";"Conductivity";81,00
2013-11-26 00:00:00;"HARTE_RAW";"MLSS";0,00
2013-11-26 00:00:00;"HARTE_RAW";"NOX";0,00
2013-11-26 00:00:00;"HARTE_RAW";"pH";6,80
2013-11-26 00:00:00;"HARTE_RAW";"PO4";5,10`
通过实现以下内容解决了所需的问题：
SELECT Point, MAX(Values)
FROM Table
WHERE Values IN(
SELECT TOP 75 PERCENT Values
FROM Table dummy
WHERE dummy.Report = "Ammonia"
AND Table.Report=dummy.Report
ORDER BY dummy.Values ASC
)
GROUP BY Point
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