在SQL Server 2008中使用Date函数进行计算

我正在为一组BINGID,INDUSID,COMP1计算TO_DATE列.

当IsRowActive = 1时,TO_DATE =“9999-12-31”,正在正确返回.

但是当IsRowActive = 0时,我们必须计算To_Date,这应该比下一个FROMDT小1秒

资料：

DECLARE @MYTABLE TABLE

(
BINGID INT,INDUSID INT,DTSEARCH DATETIME2,COMP1 VARCHAR (100),LISTPRICE NUMERIC(10,2),FROMDT DATETIME2,IsRowActive INT

)
INSERT @MYTABLE

SELECT 1002285,1002,'2016-03-03 04:10:58.0000000','0026PU009163-031','77.7600','2015-12-19 12:51:49.0000000',0 UNION ALL
SELECT 1002285,'2016-05-27 12:14:53.0000000','85.2200','2016-07-20 06:44:37.0000000','90.3900','2016-11-09 13:37:13.0000000','131.4500','2016-10-18 13:49:10.0000000',1 UNION ALL
SELECT 1002285,'2015-12-19 12:51:41.0000000','10122374',65.1400,0  UNION ALL
SELECT 1002285,'2016-03-03 04:11:01.0000000',117.2100,'2016-05-27 12:14:45.0000000',53.5500,'2016-07-20 06:44:29.0000000',48.5000,'2016-10-18 13:49:00.0000000',75.6800,'2016-11-09 13:37:02.0000000',68.2400,1 UNION ALL

SELECT 1000001,'2016-03-03 02:22:09.0000000','161GDB1577',37.1700,'2015-12-18 06:45:05.0000000',0  UNION ALL
SELECT 1000001,'2016-03-03 02:22:18.0000000','0392347402',41.9100,'2015-12-18 06:45:14.0000000','2016-05-26 14:54:28.0000000',46.7100,'2016-05-26 14:54:42.0000000',54.7100,'2016-07-15 06:34:33.0000000',52.4800,'2016-07-15 06:34:45.0000000',81.7100,'2016-10-17 11:26:45.0000000',61.6400,'2016-11-09 02:21:17.0000000',81.9200,'2016-10-17 11:26:58.0000000',1  UNION ALL
SELECT 1000001,'2016-11-09 02:21:05.0000000',78.3500,1  UNION ALL
SELECT 1000005,'2018-11-09 02:21:05.0000000','556556GHB',1

查询我尝试 – 不幸的是它返回错误的数据：

SELECT
    BINGID,DTSEARCH,COMP1,LISTPRICE,FROMDT,CASE 
       WHEN IsRowActive = 1 
          THEN '9999-12-31' 
          ELSE TO_DATE 
    END AS TO_DATE,IsRowActive
FROM 
    @MYTABLE mt
OUTER APPLY 
    (SELECT  
         MAX(DATEADD(second,-1,FROMDT)) TO_DATE 
     FROM   
         @MYTABLE mt2 
     WHERE   
         mt2.BINGID = mt.BINGID 
         AND mt2.INDUSID = mt.INDUSID 
         AND mt2.FROMDT > mt.FROMDT) oa
WHERE 
    mt.INDUSID = '1002'

预期产量

BINGID    INDUSID DTSEARCH    COMP1   LISTPRICE   FROMDT  NEW_TO_DATE IsRowCurrent
1000001 1002    2016-03-03 02:22:09.0000000 161GDB1577  37.1700 2015-12-18 06:45:05.0000000 2016-05-26 14:54:27.0000000 0
1000001 1002    2016-03-03 02:22:18.0000000 0392347402  41.9100 2015-12-18 06:45:14.0000000 2016-05-26 14:54:41.0000000 0
1000001 1002    2016-05-26 14:54:28.0000000 161GDB1577  46.7100 2016-05-26 14:54:28.0000000 2016-07-15 06:34:32.0000000 0
1000001 1002    2016-05-26 14:54:42.0000000 0392347402  54.7100 2016-05-26 14:54:42.0000000 2016-07-15 06:34:44.0000000 0
1000001 1002    2016-07-15 06:34:33.0000000 161GDB1577  52.4800 2016-07-15 06:34:33.0000000 2016-10-17 11:26:44.0000000 0
1000001 1002    2016-07-15 06:34:45.0000000 0392347402  81.7100 2016-07-15 06:34:45.0000000 2016-10-17 11:26:57.0000000 0
1000001 1002    2016-10-17 11:26:45.0000000 161GDB1577  61.6400 2016-10-17 11:26:45.0000000 2016-11-09 02:21:04.0000000 0
1000001 1002    2016-11-09 02:21:17.0000000 0392347402  81.9200 2016-10-17 11:26:58.0000000 9999-12-31 00:00:00.0000000 1
1000001 1002    2016-11-09 02:21:05.0000000 161GDB1577  78.3500 2016-11-09 02:21:05.0000000 9999-12-31 00:00:00.0000000 1
1000005 1002    2018-11-09 02:21:05.0000000 556556GHB   78.3500 2018-11-09 02:21:05.0000000 9999-12-31 00:00:00.0000000 1
1002285,2015-12-19 12:51:49.0000000'    2016-05-27 12:14:52.0000000'    0
1002285,2016-05-27 12:14:53.0000000'    2016-07-20 06:44:36.0000000'    0
1002285,2016-07-20 06:44:37.0000000'    2016-10-18 13:49:09.0000000'    0
1002285,2016-10-18 13:49:10.0000000'    9999-12-31 00:00:00.0000000 1
1002285,2016-03-03 04:11:00.0000000',0
1002285,2016-05-27 12:14:44.0000000',2016-07-20 06:44:28.0000000',2016-10-18 13:48:59.0000000',2016-11-09 13:37:01.0000000',9999-12-31 00:00:00.0000000 1

谢谢.

解决方法

我真的很喜欢@ Chanukya的答案.但是,正如您使用2008年,您将无法使用LEAD功能.相反,您可以使用自联接：

-- sql Server 2008.
SELECT
    c.*,CASE c.IsRowActive 
        WHEN 1 THEN '9999-12-31'
        ELSE DATEADD(SECOND,MIN(p.FROMDT))
    END AS TO_DATE
FROM
    @MYTABLE AS c
        LEFT OUTER JOIN @MYTABLE AS p       ON  p.BINGID    = c.BINGID
                                            AND p.INDUSID   = c.INDUSID
                                            AND p.FROMDT    > c.FROMDT
GROUP BY
    c.BINGID,c.INDUSID,c.DTSEARCH,c.COMP1,c.LISTPRICE,c.FROMDT,c.IsRowActive
ORDER BY
    c.FROMDT
;

逻辑类似于你的外部应用,但它应该表现更好.这是因为没有correlation.

样本数据呈现出一个小小的挑战.因为有两个FROMDT的记录,你们可以说我的结果是错误的.

原文地址：https://www.jb51.cc/mssql/82262.html

在SQL Server 2008中使用Date函数进行计算

解决方法

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