TSQL-添加缺少的日期
我有一个查询,结果如下表所示:TSQL-添加缺少的日期,tsql,sql-server-2014,recursive-query,dateadd,Tsql,Sql Server 2014,Recursive Query,Dateadd,我有一个查询,结果如下表所示: select * from (select [iKey], [StartDate], [FirstFCDate] from (SELECT [iKey], min([Date]) as [FirstFCDate] from dbo.factFC group by [iKey]) as gp left outer join (select [StartDate], [Key] from dbo.iKeys) dw on gp.iKey = dw.[Key]) ft
select * from (select [iKey], [StartDate], [FirstFCDate] from (SELECT [iKey], min([Date]) as [FirstFCDate] from dbo.factFC group by [iKey]) as gp left outer join (select [StartDate], [Key] from dbo.iKeys) dw on gp.iKey = dw.[Key]) ft
Table1
iKey StartDate FirstFCDate
101 2017-01-13 2017-04-01
52 2016-11-11 2017-04-01
21 2017-02-23 2017-04-01
19 2014-01-21 2017-05-01
34 2016-08-18 2017-07-01
我要做的是在事实表中插入一行,一个名为dbo.factProd的单独表,以便在该表上,在开始日期和FirstFCDate之间的每个日期都有一行
目前,我的事实表如下所示:
factProd
ID iKey Date pAmount fcKey
1 101 2017-04-01 123 1
2 101 2017-04-01 456 2
3 101 2017-04-02 789 1
4 101 2017-04-02 103 2
5 101 2017-04-03 192 1
6 101 2017-04-03 112 2
如您所见,对于iKey 101,factProd表上的第一个日期是2017-04-01,它与表1中的FirstFCDate列正确对应
我想做的是为2017-01-13之间的每个日期从每个iKey+fcKey组合的StartDate列向factProd表添加一行
因此最终结果应该看起来像是自动生成的ID:
factProd
ID iKey Date pAmount fcKey
99 101 2017-01-13 0 1
100 101 2017-01-13 0 2
101 101 2017-01-14 0 1
102 101 2017-01-14 0 2
103 101 2017-01-15 0 1
104 101 2017-01-15 0 2
... ... ... ... ...
199 101 2017-03-31 0 1
200 101 2017-03-31 0 2
1 101 2017-04-01 123 1
2 101 2017-04-01 456 2
3 101 2017-04-02 789 1
4 101 2017-04-02 103 2
5 101 2017-04-03 192 1
6 101 2017-04-03 112 2
詹姆斯
您可能会发现,为事实表中的所有可能日期(即最小日期和最大日期)构建一个包含一行的CTE表很有帮助,然后左键连接到该表以查找缺少的日期。您可能还想考虑使用LealEngin、NULL逻辑插入到事实表中,以获得丢失的日期。您的场景比这要复杂一些,但它可能会引导您走上一条好的道路。以下是构建该表的一些代码:
DECLARE @FromDate datetime
DECLARE @ToDate datetime
SET @FromDate = '1/1/2017'
SET @ToDate = '1/1/2018';
WITH DayTable AS (SELECT CAST(@FromDate AS DATETIME) AS theDate UNION ALL SELECT DATEADD(dd, 1, theDate) FROM DayTable s WHERE DATEADD(dd, 1, theDate) <= CAST(@ToDate AS DATETIME))
SELECT * FROM DayTable
OPTION
(MAXRECURSION 32767)
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