Sql server 2005 SCD类型2的T-SQL语法
我目前正在尝试完成将scd类型2数据加载到维度的查询的最后一部分。 根据下面提供的数据,我希望生成一个输出,除了 过期旧记录和跟踪历史记录等。这些数据使得我拥有属性已更改的最新记录。更改的值与更改日期(即更改发生的日期)一起出现在查找列中。此更改日期显然应成为最新记录的有效日期 样本数据如下:Sql server 2005 SCD类型2的T-SQL语法,sql-server-2005,tsql,data-warehouse,scd2,Sql Server 2005,Tsql,Data Warehouse,Scd2,我目前正在尝试完成将scd类型2数据加载到维度的查询的最后一部分。 根据下面提供的数据,我希望生成一个输出,除了 过期旧记录和跟踪历史记录等。这些数据使得我拥有属性已更改的最新记录。更改的值与更改日期(即更改发生的日期)一起出现在查找列中。此更改日期显然应成为最新记录的有效日期 样本数据如下: CREATE TABLE #tstDimPortfolio ( [ID][INT] IDENTITY (1,1) NOT NULL, [UPI] [varchar](20) NOT NULL, [MF_C
CREATE TABLE #tstDimPortfolio
(
[ID][INT] IDENTITY (1,1) NOT NULL,
[UPI] [varchar](20) NOT NULL,
[MF_CODE] [varchar](10) NULL,
[BH_Code] [varchar](10) NULL,
[CR_Code] [varchar](10) NULL,
[ValidFrom][varchar](10) NOT NULL,
[ValidTo][varchar](10) NULL,
[IsCurrent] [CHAR] (1) NULL,
[DateofChange] [varchar](10) NULL,
[LookupMF_CODE] [varchar](10) NULL,
[LookupBH_Code] [varchar](10) NULL,
[LookupCR_Code] [varchar](10) NULL,
)
INSERT INTO #tstDimPortfolio
SELECT 'B06531','B06531','','B06531','20111230',NULL,'Y','20120101','','B06531', ''
UNION ALL
SELECT 'BLI003','','BLI003','BBL_WORLD','20111230',NULL,'Y','20120102','BLI004','', ''UNION ALL
SELECT 'BLI003','','BLI003','BBL_WORLD','20111230',NULL,'Y','20120103','BLI005','', ''UNION ALL
SELECT 'BLI027','BLI027','L147','BBL_GBN','20111230',NULL,'Y','20120104','','L146', ''
有了这些数据,新的输出应该是
UPI MF_CODE BH_Code CR_Code ValidFrom ValidTo IsCurrent
_______________________________________________________________________
B06531 B06531 B06531 20111230 20120101 N
B06531 B06531 B06531 B06531 20120101 NULL Y
BLI003 BLI003 BBL_WORLD 20111230 20120102 N
BLI003 BLI004 BLI003 BBL_WORLD 20120102 20120103 N
BLI003 BLI005 BLI003 BBL_WORLD 20120103 NULL Y
BLI027 BLI027 L147 BBL_GBN 20111230 20120104 N
BLI027 BLI027 L146 BBL_GBN 20120104 NULL Y
有什么想法吗?我不知道你的自然钥匙在这张桌子上。是UPI吗?如果是这样,您有两条具有相同UPI的记录BLI003,但它们都处于活动状态,这种情况永远不会发生 不管怎样,假设是UPI。如果我们要更新B06531,请将您的更新放入表中:
CREATE TABLE #tstDimPortfolioUpdates
(
[ID][INT] IDENTITY (1,1) NOT NULL,
[UPI] [varchar](20) NOT NULL,
[MF_CODE] [varchar](10) NULL,
[BH_Code] [varchar](10) NULL,
[CR_Code] [varchar](10) NULL,
[ValidFrom][varchar](20) NOT NULL,
[ValidTo][varchar](15) NULL,
[IsCurrent] [CHAR] (1) NULL,
[DateofChange] [varchar](10) NULL,
[LookupMF_CODE] [varchar](10) NULL,
[LookupBH_Code] [varchar](10) NULL,
[LookupCR_Code] [varchar](10) NULL,
)
INSERT INTO #tstDimPortfolioUpdates
SELECT 'B06531','B06531','B06531','B06531','20120102',NULL,'Y','20120102','','B06531', ''
通过更改ValidTo、IsCurrent和DateOfChange值,设置任何不应再处于活动状态的记录
UPDATE dp
SET ValidTo = '20120101', IsCurrent = 'N', DateOfChange = '20120101'
FROM #tstDimPortfolio dp
INNER JOIN #tstDimPortfolioUpdates up ON dp.UPI = up.UPI
AND dp.IsCurrent = 'Y'
插入新记录
INSERT INTO #tstDimPortfolio (UPI, MF_Code, BH_Code, CR_Code, ValidFrom, ValidTo
,IsCurrent, DateOfChange, LookupMF_Code, LookupBH_Code, LookupCR_Code)
SELECT UPI, MF_Code, BH_Code, CR_Code, ValidFrom, ValidTo
,IsCurrent, DateOfChange, LookupMF_Code, LookupBH_Code, LookupCR_Code
FROM #tstDimPortfolioUpdates
再次检查更新是否正确
SELECT * FROM #tstDimPortfolio
ORDER BY UPI
我使用递归cte成功地获得了期望的结果。UPI是自然的关键。但是,事件实际上来自一个单独的文件,该文件以轴为轴并连接到维度。BLI003有两行,因为它有两个事件。sql语句如下所示:
CREATE TABLE #tstDimPortfolio
(
[ID][INT] IDENTITY (1,1) NOT NULL,
[UPI] [varchar](20) NOT NULL,
[MF_CODE] [varchar](10) NULL,
[BH_Code] [varchar](10) NULL,
[CR_Code] [varchar](10) NULL,
[ValidFrom][varchar](10) NOT NULL,
[ValidTo][varchar](10) NULL,
[IsCurrent] [CHAR] (1) NULL,
[DateofChange] [varchar](10) NULL,
[LookupMF_CODE] [varchar](10) NULL,
[LookupBH_Code] [varchar](10) NULL,
[LookupCR_Code] [varchar](10) NULL,
)
INSERT INTO #tstDimPortfolio
SELECT 'B06531','B06531','','B06531','20111230',NULL,'Y','20120101','','B06531', ''UNION ALL
SELECT 'BLI003','','BLI003','BBL_WORLD','20111230',NULL,'Y','20120102','BLI004','', ''UNION ALL
SELECT 'BLI003','','BLI003','BBL_WORLD','20111230',NULL,'Y','20120103','','BLI005', ''UNION ALL
SELECT 'BLI027','BLI027','L147','BBL_GBN','20111230',NULL,'Y','20120104','','L146', ''
SELECT ROW_NUMBER() OVER (PARTITION BY UPI ORDER BY UPI, DateofChange) Sequence,
UPI,
CASE WHEN LookupMF_CODE <> '' THEN LookupMF_CODE ELSE MF_CODE END MF_CODE,
CASE WHEN LookupMF_CODE <> '' THEN LookupBH_Code ELSE BH_Code END BH_Code,
CASE WHEN LookupCR_Code <> '' THEN LookupCR_Code ELSE CR_Code END CR_Code,
ValidFrom, ValidTo, IsCurrent, DateofChange,
LookupMF_CODE,
LookupBH_CODE,
LookupCR_CODE
INTO #Dimension_Table
FROM #tstDimPortfolio
;WITH AddedDim AS
(SELECT * FROM
(
SELECT
ROW_NUMBER() OVER (PARTITION BY UPI ORDER BY UPI, DateofChange) Sequence,
UPI,
CASE WHEN LookupMF_CODE <> '' THEN LookupMF_CODE ELSE MF_CODE END MF_CODE,
CASE WHEN LookupBH_CODE <> '' THEN LookupBH_Code ELSE BH_Code END BH_Code,
CASE WHEN LookupCR_Code <> '' THEN LookupCR_Code ELSE CR_Code END CR_Code,
DateofChange AS ValidFrom,
ValidTo,
IsCurrent
FROM #tstDimPortfolio
)A
WHERE SEQUENCE = 1
UNION ALL
SELECT
DT.Sequence
, DT.UPI
,CASE WHEN DT.LookupMF_CODE <> '' THEN DT.LookupMF_CODE ELSE DM.MF_CODE END MF_CODE
,CASE WHEN DT.LookupBH_CODE <> '' THEN DT.LookupBH_Code ELSE DM.BH_Code END BH_Code
,CASE WHEN DT.LookupCR_Code <> '' THEN DT.LookupCR_Code ELSE DM.CR_Code END CR_Code
,DT.DateofChange AS ValidFrom
,DT.ValidTo
,DT.IsCurrent
FROM #Dimension_Table dt inner join
AddedDim dm
on DT.UPI = DM.UPI
AND dt.Sequence = DM.Sequence + 1
)
选择*
变成临时工
从adddim开始@mitchwheat首先必须用t-sql完成。A目前我们没有SSI,因此它与通过存储过程所做的一样。我尝试用以下内容将表连接到自身:@Mitch-Wheat首先,它必须用t-sql完成。A目前我们没有SSI,因此它与通过存储过程所做的一样。我已尝试在upi和dateOfchange