我有以下查询：
WITH CTE
AS (
SELECT CASE
WHEN shareClassdata.valueDate IS NULL
THEN NULL
ELSE performanceData.valueDate
END AS valueDate
,CASE
WHEN shareClassdata.benchmarkTypeName IS NULL
THEN NULL
ELSE performanceData.benchmarkTypeName
END AS benchmarkTypeName
,CASE
WHEN shareClassdata.NAVLocal IS NULL
THEN NULL
ELSE performanceData.NAVLocal
END AS NAVLocal
FROM getPerformances(2, 12045, 0, 308, 31) AS performanceData
LEFT JOIN (
SELECT *
FROM getPerformances(2, 12045, 0, 308, 31)
) shareClassdata ON shareClassdata.shareClassGroupId = performanceData.shareClassGroupId
AND shareClassdata.currencyId = performanceData.currencyId
AND shareClassdata.financialStructureGroupId = performanceData.financialStructureGroupId
AND shareClassdata.valueDate = performanceData.valueDate
AND shareClassdata.benchmarkTypeName = 'Fund'
WHERE performanceData.shareClassGroupId = 22050
AND performanceData.valueDate <= '2017-06-30 00:00:00.000'
AND (
isnull(performanceData.valueDate, '') <> ''
AND (
performanceData.benchmarkTypeName = 'Benchmark'
OR performanceData.benchmarkTypeName = 'Fund'
)
)
)
SELECT valueDate
,benchmarkTypeName
,NAVLocal
FROM CTE AS a
WHERE valueDate IS NOT NULL
AND benchmarkTypeName IS NOT NULL
ORDER BY benchmarkTypeName ASC
,valueDate ASC
给出以下结果：
+------------+-------------------+---------------+
| valueDate | benchmarkTypeName | NAVLocal |
| 2016-11-30 | Benchmark | 3005.96900000 |
| 2016-12-01 | Benchmark | 2994.49800000 |
| 2016-12-02 | Benchmark | 2981.91900000 |
| 2016-12-05 | Benchmark | 2981.43800000 |
| 2016-12-07 | Benchmark | 3020.05600000 |
| 2016-12-09 | Benchmark | 3110.80600000 |
| 2016-12-12 | Benchmark | 3086.44800000 |
| 2016-12-13 | Benchmark | 3097.51400000 |
| 2016-12-14 | Benchmark | 3069.05100000 |
| 2016-12-15 | Benchmark | 3151.47600000 |
| 2016-12-16 | Benchmark | 3147.68300000 |
| 2016-12-19 | Benchmark | 3145.64400000 |
| 2016-12-20 | Benchmark | 3175.35200000 |
| 2016-12-21 | Benchmark | 3150.92500000 |
| 2016-12-22 | Benchmark | 3138.26200000 |
| 2016-12-23 | Benchmark | 3140.90700000 |
| 2016-12-28 | Benchmark | 3142.34100000 |
| 2016-12-29 | Benchmark | 3112.91600000 |
| 2016-12-30 | Benchmark | 3081.54600000 |
| 2017-01-03 | Benchmark | 3156.68300000 |
| 2017-01-04 | Benchmark | 3147.51700000 |
| 2017-01-05 | Benchmark | 3108.02700000 |
| 2017-01-09 | Benchmark | 3121.82400000 |
| 2017-01-10 | Benchmark | 3111.07500000 |
| 2017-01-11 | Benchmark | 3156.88600000 |
| 2017-01-12 | Benchmark | 3095.46800000 |
| 2017-01-13 | Benchmark | 3109.50500000 |
| 2017-01-16 | Benchmark | 3109.50500000 |
| 2017-01-17 | Benchmark | 3080.41900000 |
| 2017-01-18 | Benchmark | 3086.20700000 |
| 2017-01-19 | Benchmark | 3098.86800000 |
| 2017-01-20 | Benchmark | 3089.86100000 |
| 2017-01-23 | Benchmark | 3062.10800000 |
| 2017-01-24 | Benchmark | 3079.78000000 |
| 2017-01-25 | Benchmark | 3108.25500000 |
| 2017-01-26 | Benchmark | 3127.41500000 |
| 2017-01-27 | Benchmark | 3114.02100000 |
| 2017-01-30 | Benchmark | 3099.60200000 |
| 2017-01-31 | Benchmark | 3063.61700000 |
| 2016-11-30 | Fund | 280.77300000 |
| 2016-12-01 | Fund | 279.07500000 |
| 2016-12-02 | Fund | 278.43100000 |
| 2016-12-05 | Fund | 279.70400000 |
| 2016-12-07 | Fund | 284.04200000 |
| 2016-12-09 | Fund | 290.47600000 |
| 2016-12-12 | Fund | 289.81900000 |
| 2016-12-13 | Fund | 292.15500000 |
| 2016-12-14 | Fund | 290.95000000 |
| 2016-12-15 | Fund | 291.62200000 |
| 2016-12-16 | Fund | 292.25700000 |
| 2016-12-19 | Fund | 293.07300000 |
| 2016-12-20 | Fund | 294.23700000 |
| 2016-12-21 | Fund | 293.81300000 |
| 2016-12-22 | Fund | 292.81400000 |
| 2016-12-23 | Fund | 293.08400000 |
| 2016-12-28 | Fund | 294.89500000 |
| 2016-12-29 | Fund | 294.22000000 |
| 2016-12-30 | Fund | 295.24100000 |
| 2017-01-03 | Fund | 296.37400000 |
| 2017-01-04 | Fund | 294.59900000 |
| 2017-01-05 | Fund | 295.30700000 |
| 2017-01-09 | Fund | 294.18400000 |
| 2017-01-10 | Fund | 294.42100000 |
| 2017-01-11 | Fund | 294.96700000 |
| 2017-01-12 | Fund | 293.68800000 |
| 2017-01-13 | Fund | 295.94300000 |
| 2017-01-16 | Fund | 294.73900000 |
| 2017-01-17 | Fund | 294.24300000 |
| 2017-01-18 | Fund | 295.48600000 |
| 2017-01-19 | Fund | 294.83300000 |
| 2017-01-20 | Fund | 294.29800000 |
| 2017-01-23 | Fund | 293.80800000 |
| 2017-01-24 | Fund | 294.64100000 |
| 2017-01-25 | Fund | 296.76600000 |
| 2017-01-26 | Fund | 297.37800000 |
| 2017-01-27 | Fund | 297.26900000 |
| 2017-01-30 | Fund | 294.67800000 |
| 2017-01-31 | Fund | 292.99700000 |
+------------+-------------------+---------------+
我需要将第三列重新设置为100，所以我编写了以下完美的工作：
WITH CTE
AS (
SELECT CASE
WHEN shareClassdata.valueDate IS NULL
THEN NULL
ELSE performanceData.valueDate
END AS valueDate
,CASE
WHEN shareClassdata.benchmarkTypeName IS NULL
THEN NULL
ELSE performanceData.benchmarkTypeName
END AS benchmarkTypeName
,CASE
WHEN shareClassdata.NAVLocal IS NULL
THEN NULL
ELSE performanceData.NAVLocal
END AS NAVLocal
FROM getPerformances(2, 12045, 0, 308, 31) AS performanceData
LEFT JOIN (
SELECT *
FROM getPerformances(2, 12045, 0, 308, 31)
) shareClassdata ON shareClassdata.shareClassGroupId = performanceData.shareClassGroupId
AND shareClassdata.currencyId = performanceData.currencyId
AND shareClassdata.financialStructureGroupId = performanceData.financialStructureGroupId
AND shareClassdata.valueDate = performanceData.valueDate
AND shareClassdata.benchmarkTypeName = 'Fund'
WHERE performanceData.shareClassGroupId = 22050
AND performanceData.valueDate <= '2017-06-30 00:00:00.000'
AND (
isnull(performanceData.valueDate, '') <> ''
AND (
performanceData.benchmarkTypeName = 'Benchmark'
OR performanceData.benchmarkTypeName = 'Fund'
)
)
)
SELECT valueDate
,benchmarkTypeName
,(
sum(a.NAVLocal) / (
SELECT TOP 1 b.NAVLocal
FROM CTE AS b
WHERE b.NAVLocal != 0
AND a.benchmarkTypeName = b.benchmarkTypeName
ORDER BY b.valueDate ASC
)
) * 100 AS NAVLocal
FROM CTE AS a
WHERE valueDate IS NOT NULL
AND benchmarkTypeName IS NOT NULL
GROUP BY valueDate
,benchmarkTypeName
ORDER BY benchmarkTypeName ASC
,valueDate ASC
它给出了以下结果（注意：NAVLocal列只是为了显示旧的vs以前的值）：
+------------+-------------------+----------+------------------+
| valueDate | benchmarkTypeName | NAVLocal | NAVLocal rebased |
| 2016-11-30 | Benchmark | 3005.969 | 100 |
| 2016-12-01 | Benchmark | 2994.498 | 99.6183 |
| 2016-12-02 | Benchmark | 2981.919 | 99.1999 |
| 2016-12-05 | Benchmark | 2981.438 | 99.1839 |
| 2016-12-07 | Benchmark | 3020.056 | 100.4686 |
| 2016-12-09 | Benchmark | 3110.806 | 103.4876 |
| 2016-12-12 | Benchmark | 3086.448 | 102.6773 |
| 2016-12-13 | Benchmark | 3097.514 | 103.0454 |
| 2016-12-14 | Benchmark | 3069.051 | 102.0985 |
| 2016-12-15 | Benchmark | 3151.476 | 104.8406 |
| 2016-12-16 | Benchmark | 3147.683 | 104.7144 |
| 2016-12-19 | Benchmark | 3145.644 | 104.6465 |
| 2016-12-20 | Benchmark | 3175.352 | 105.6348 |
| 2016-12-21 | Benchmark | 3150.925 | 104.8222 |
| 2016-12-22 | Benchmark | 3138.262 | 104.401 |
| 2016-12-23 | Benchmark | 3140.907 | 104.489 |
| 2016-12-28 | Benchmark | 3142.341 | 104.5367 |
| 2016-12-29 | Benchmark | 3112.916 | 103.5578 |
| 2016-12-30 | Benchmark | 3081.546 | 102.5142 |
| 2017-01-03 | Benchmark | 3156.683 | 105.0138 |
| 2017-01-04 | Benchmark | 3147.517 | 104.7088 |
| 2017-01-05 | Benchmark | 3108.027 | 103.3951 |
| 2017-01-09 | Benchmark | 3121.824 | 103.8541 |
| 2017-01-10 | Benchmark | 3111.075 | 103.4965 |
| 2017-01-11 | Benchmark | 3156.886 | 105.0205 |
| 2017-01-12 | Benchmark | 3095.468 | 102.9773 |
| 2017-01-13 | Benchmark | 3109.505 | 103.4443 |
| 2017-01-16 | Benchmark | 3109.505 | 103.4443 |
| 2017-01-17 | Benchmark | 3080.419 | 102.4767 |
| 2017-01-18 | Benchmark | 3086.207 | 102.6692 |
| 2017-01-19 | Benchmark | 3098.868 | 103.0904 |
| 2017-01-20 | Benchmark | 3089.861 | 102.7908 |
| 2017-01-23 | Benchmark | 3062.108 | 101.8675 |
| 2017-01-24 | Benchmark | 3079.78 | 102.4554 |
| 2017-01-25 | Benchmark | 3108.255 | 103.4027 |
| 2017-01-26 | Benchmark | 3127.415 | 104.0401 |
| 2017-01-27 | Benchmark | 3114.021 | 103.5945 |
| 2017-01-30 | Benchmark | 3099.602 | 103.1149 |
| 2017-01-31 | Benchmark | 3063.617 | 101.9177 |
| 2016-11-30 | Fund | 280.773 | 100 |
| 2016-12-01 | Fund | 279.075 | 99.3952 |
| 2016-12-02 | Fund | 278.431 | 99.1658 |
| 2016-12-05 | Fund | 279.704 | 99.6192 |
| 2016-12-07 | Fund | 284.042 | 101.1642 |
| 2016-12-09 | Fund | 290.476 | 103.4558 |
| 2016-12-12 | Fund | 289.819 | 103.2218 |
| 2016-12-13 | Fund | 292.155 | 104.0538 |
| 2016-12-14 | Fund | 290.95 | 103.6246 |
| 2016-12-15 | Fund | 291.622 | 103.8639 |
| 2016-12-16 | Fund | 292.257 | 104.0901 |
| 2016-12-19 | Fund | 293.073 | 104.3807 |
| 2016-12-20 | Fund | 294.237 | 104.7953 |
| 2016-12-21 | Fund | 293.813 | 104.6443 |
| 2016-12-22 | Fund | 292.814 | 104.2885 |
| 2016-12-23 | Fund | 293.084 | 104.3846 |
| 2016-12-28 | Fund | 294.895 | 105.0296 |
| 2016-12-29 | Fund | 294.22 | 104.7892 |
| 2016-12-30 | Fund | 295.241 | 105.1529 |
| 2017-01-03 | Fund | 296.374 | 105.5564 |
| 2017-01-04 | Fund | 294.599 | 104.9242 |
| 2017-01-05 | Fund | 295.307 | 105.1764 |
| 2017-01-09 | Fund | 294.184 | 104.7764 |
| 2017-01-10 | Fund | 294.421 | 104.8608 |
| 2017-01-11 | Fund | 294.967 | 105.0553 |
| 2017-01-12 | Fund | 293.688 | 104.5998 |
| 2017-01-13 | Fund | 295.943 | 105.4029 |
| 2017-01-16 | Fund | 294.739 | 104.9741 |
| 2017-01-17 | Fund | 294.243 | 104.7974 |
| 2017-01-18 | Fund | 295.486 | 105.2401 |
| 2017-01-19 | Fund | 294.833 | 105.0076 |
| 2017-01-20 | Fund | 294.298 | 104.817 |
| 2017-01-23 | Fund | 293.808 | 104.6425 |
| 2017-01-24 | Fund | 294.641 | 104.9392 |
| 2017-01-25 | Fund | 296.766 | 105.696 |
| 2017-01-26 | Fund | 297.378 | 105.914 |
| 2017-01-27 | Fund | 297.269 | 105.8752 |
| 2017-01-30 | Fund | 294.678 | 104.9523 |
| 2017-01-31 | Fund | 292.997 | 104.3536 |
+------------+-------------------+----------+------------------+
但是，对于大型数据集，查询运行速度非常慢。有没有更好的方法来执行此计算？
关于改变数字的提醒：
对于每个基准系列，结果在值日期上升。最重要的值是每个系列的最早记录。系列的每个NAV值除以最老的NAV，乘以100
您可以使用公式访问此电子表格 https://docs.google.com/spreadsheets/d/1esChCFPTLa9df3xWuLmT5-JONsS8j8vTZpAjsx7fb9M/edit?usp=sharing
谢谢
答案 0 :(得分：3)
窗口函数可能有助于提高性能，我从第一个输出开始，但你应该知道如何通过窗口函数实现它
USE
tempdb
GO
DROP TABLE IF EXISTS Rebase;
CREATE TABLE Rebase(
valueDate DATE NOT NULL
,benchmarkTypeName VARCHAR(9) NOT NULL
,NAVLocal NUMERIC(8,3) NOT NULL
);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2016-11-30','Benchmark',3005.969);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2016-12-01','Benchmark',2994.498);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2016-12-02','Benchmark',2981.919);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2016-12-05','Benchmark',2981.438);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2016-12-07','Benchmark',3020.056);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2016-12-09','Benchmark',3110.806);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2016-12-12','Benchmark',3086.448);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2016-12-13','Benchmark',3097.514);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2016-12-14','Benchmark',3069.051);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2016-12-15','Benchmark',3151.476);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2016-12-16','Benchmark',3147.683);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2016-12-19','Benchmark',3145.644);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2016-12-20','Benchmark',3175.352);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2016-12-21','Benchmark',3150.925);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2016-12-22','Benchmark',3138.262);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2016-12-23','Benchmark',3140.907);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2016-12-28','Benchmark',3142.341);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2016-12-29','Benchmark',3112.916);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2016-12-30','Benchmark',3081.546);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2017-01-03','Benchmark',3156.683);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2017-01-04','Benchmark',3147.517);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2017-01-05','Benchmark',3108.027);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2017-01-09','Benchmark',3121.824);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2017-01-10','Benchmark',3111.075);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2017-01-11','Benchmark',3156.886);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2017-01-12','Benchmark',3095.468);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2017-01-13','Benchmark',3109.505);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2017-01-16','Benchmark',3109.505);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2017-01-17','Benchmark',3080.419);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2017-01-18','Benchmark',3086.207);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2017-01-19','Benchmark',3098.868);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2017-01-20','Benchmark',3089.861);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2017-01-23','Benchmark',3062.108);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2017-01-24','Benchmark',3079.78);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2017-01-25','Benchmark',3108.255);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2017-01-26','Benchmark',3127.415);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2017-01-27','Benchmark',3114.021);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2017-01-30','Benchmark',3099.602);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2017-01-31','Benchmark',3063.617);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2016-11-30','Fund',280.773);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2016-12-01','Fund',279.075);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2016-12-02','Fund',278.431);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2016-12-05','Fund',279.704);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2016-12-07','Fund',284.042);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2016-12-09','Fund',290.476);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2016-12-12','Fund',289.819);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2016-12-13','Fund',292.155);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2016-12-14','Fund',290.95);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2016-12-15','Fund',291.622);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2016-12-16','Fund',292.257);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2016-12-19','Fund',293.073);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2016-12-20','Fund',294.237);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2016-12-21','Fund',293.813);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2016-12-22','Fund',292.814);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2016-12-23','Fund',293.084);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2016-12-28','Fund',294.895);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2016-12-29','Fund',294.22);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2016-12-30','Fund',295.241);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2017-01-03','Fund',296.374);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2017-01-04','Fund',294.599);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2017-01-05','Fund',295.307);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2017-01-09','Fund',294.184);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2017-01-10','Fund',294.421);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2017-01-11','Fund',294.967);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2017-01-12','Fund',293.688);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2017-01-13','Fund',295.943);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2017-01-16','Fund',294.739);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2017-01-17','Fund',294.243);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2017-01-18','Fund',295.486);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2017-01-19','Fund',294.833);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2017-01-20','Fund',294.298);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2017-01-23','Fund',293.808);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2017-01-24','Fund',294.641);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2017-01-25','Fund',296.766);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2017-01-26','Fund',297.378);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2017-01-27','Fund',297.269);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2017-01-30','Fund',294.678);
INSERT INTO Rebase(valueDate,benchmarkTypeName,NAVLocal) VALUES ('2017-01-31','Fund',292.997);
SELECT
valueDate
, benchmarkTypeName
, NAVLocal
, FIRST_VALUE(NAVLocal) OVER(PARTITION BY benchmarkTypeName ORDER BY valueDate) AS Oldest
, (NAVLOCAL / FIRST_VALUE(NAVLocal) OVER(PARTITION BY benchmarkTypeName ORDER BY valueDate)) * 100 aS RebaseValue
FROM
Rebase