使用 Tally Table 填写 SQL 中按日期排序的缺失日期

Question

我在数据库中有一个 table 包含租户数量的数据库，每个租户都列出了他们每个日期的销售额记录。在某些情况下，租户没有销售，特别是 date/s，因此没有销售的日期在 table 中没有记录，打破了正确的日期顺序。请参阅下面的示例 table：

我在 SQL 中使用了这个 select 查询来显示上面的输出

select tenant, date, sales
from tblSales
where date between '01/01/2015' and '01/05/2014'

我需要的正确输出：根据 where 子句上的 selected 日期范围显示完整日期，当租户在特定日期没有记录时，查询应添加日期记录在该特定租户中，只需在销售列中添加空值，如下图所示：

作为我最初的解决方案，我想创建一个临时 table 插入一个基于日期范围 selected 的日期序列，并使用它与实际 table 左连接].

这是我开始的：

@dateFrom datetime  = '02/01/2015',
@dateTo date = '02/05/2015'    

declare @MaxNumDays int
declare @Counter int
                
set @Counter = 0
set @MaxNumDays = DATEDIFF(day, @dateFrom  , @dateto) + 1                
    
create table #DSRTdate (
    Date datetime
)
    
WHILE @Counter < @MaxNumDays
BEGIN
    insert into #DSRTdate (Date) values (DATEADD(day,@Counter,@dateFrom ))
    SET @Counter += 1
END

我使用上面的代码获取并插入临时 table 来自使用 selection 的序列数据，在上面的例子中，它插入 02/01/2015, 02/ 02/2015、02/03/2015、02/04/2015 和 02/05/2015

select tenantcode, date, sales
into #DSRT2
from DAILYMOD 
where (date between @dateFrom and @dateTo)
   
select *
from #dsrtdate a
left join #DSRT2 b on a.date = b.date
order by b.tenantcode, a.date

然后我使用 left join 来显示缺少的日期，但这只会对一个租户产生影响，并且它也会使租户名称为空。像这样：

如有任何建议，我们将不胜感激。

Answer 1

您可以使用 Tally Table。

基本上，您使用 Tally Table 生成从 @startDate 到 @endDate 的日期序列，然后使用 CROSS JOIN 到 DISTINCT Item 生成所有 Date-Item组合。然后，结果将 LEFT-JOIN 编辑为 tblSales 以获得所需的输出。

SQL Fiddle

DECLARE
    @startDate  DATE = '20140101',
    @endDate    DATE = '20140105';

WITH E1(N) AS(
    SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL
    SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1
)
,E2(N) AS(SELECT 1 FROM E1 a, E1 b)
,E4(N) AS(SELECT 1 FROM E2 a, E2 b)
,Tally(N) AS(
    SELECT TOP (DATEDIFF(DAY, @startDate, @endDate) + 1) 
        ROW_NUMBER() OVER(ORDER BY(SELECT NULL))
    FROM E4
)
,CteAllDates(Item, dt) AS(
    SELECT x.Item, DATEADD(DAY, N - 1, @startDate)
    FROM Tally
    CROSS JOIN(
        SELECT DISTINCT Item 
        FROM tblSales
        WHERE [Date] BETWEEN @startDate AND @endDate
    ) AS x
)
SELECT d.*, ts.Sales
FROM CteAllDates d
LEFT JOIN tblSales ts
    ON ts.Item = d.Item
    AND ts.Date = d.dt
WHERE
    ts.[Date] BETWEEN @startDate AND @endDate
ORDER BY d.Item, d.dt

这是一个替代方案。而不是级联 CTEs，使用 sys.columns 生成 Tally Table.:

DECLARE
    @startDate  DATE = '20140101',
    @endDate    DATE = '20140105';

WITH Tally(N) AS(
    SELECT TOP (DATEDIFF(DAY, @startDate, @endDate) + 1) 
        ROW_NUMBER() OVER(ORDER BY(SELECT NULL))
    FROM sys.columns a, sys.columns b
)
,CteAllDates(Item, dt) AS(
    SELECT x.Item, DATEADD(DAY, N - 1, @startDate)
    FROM Tally
    CROSS JOIN(
        SELECT DISTINCT Item 
        FROM tblSales
        WHERE [Date] BETWEEN @startDate AND @endDate
    ) AS x
)
SELECT d.*, ts.Sales
FROM CteAllDates d
LEFT JOIN tblSales ts
    ON ts.Item = d.Item
    AND ts.Date = d.dt
WHERE
    ts.[Date] BETWEEN @startDate AND @endDate
ORDER BY d.Item, d.dt

结果

|    Item |         dt |  Sales |
|---------|------------|--------|
| tenant1 | 2014-01-01 |    100 |
| tenant1 | 2014-01-02 |    100 |
| tenant1 | 2014-01-03 |    100 |
| tenant1 | 2014-01-04 |   NULL |
| tenant1 | 2014-01-05 |    100 |
| tenant2 | 2014-01-01 |    100 |
| tenant2 | 2014-01-02 |   NULL |
| tenant2 | 2014-01-03 |   NULL |
| tenant2 | 2014-01-04 |    100 |
| tenant2 | 2014-01-05 |   NULL |
| tenant3 | 2014-01-01 |    100 |
| tenant3 | 2014-01-02 |   NULL |
| tenant3 | 2014-01-03 |    100 |
| tenant3 | 2014-01-04 |   NULL |
| tenant3 | 2014-01-05 |    100 |

Answer 2

我lovewewesthemenace回答！投票并保存以供将来参考。这是另一个建议。在 Crystal 的 SQL 命令中使用此代码。左外连接到您的 table 销售额。它的长。这很乏味。但是，如果您不是 SQL 专家，它更容易理解，这很好地描述了我 :) 如果您找到了他的答案并且有效，那么请忽略此解决方案。

注意：除了满足在这样的 SQL 语句中使用 from 子句的要求外，from 子句没有任何作用。如果 tblSales 很大 table 考虑使用您的数据库中的一个，它的数据较少并且仍然保留到 tblSales 的外部连接。

    select distinct
cast(concat(DATEPART(YYYY, GETDATE()),'-',DATEPART(MM,GETDATE()),'-','01') as DATE) as salesdate
from tblSales
UNION
select distinct
cast(concat(DATEPART(YYYY, GETDATE()),'-',DATEPART(MM,GETDATE()),'-','02') as DATE) as salesdate
from tblSales
UNION
select distinct
cast(concat(DATEPART(YYYY, GETDATE()),'-',DATEPART(MM,GETDATE()),'-','03') as DATE) as salesdate
from tblSales
UNION
select distinct
cast(concat(DATEPART(YYYY, GETDATE()),'-',DATEPART(MM,GETDATE()),'-','04') as DATE) as salesdate
from tblSales
UNION
select distinct
cast(concat(DATEPART(YYYY, GETDATE()),'-',DATEPART(MM,GETDATE()),'-','05') as DATE) as salesdate
from tblSales
UNION
select distinct
cast(concat(DATEPART(YYYY, GETDATE()),'-',DATEPART(MM,GETDATE()),'-','06') as DATE) as salesdate
from tblSales
UNION
select distinct
cast(concat(DATEPART(YYYY, GETDATE()),'-',DATEPART(MM,GETDATE()),'-','07') as DATE) as salesdate
from tblSales
UNION
select distinct
cast(concat(DATEPART(YYYY, GETDATE()),'-',DATEPART(MM,GETDATE()),'-','08') as DATE) as salesdate
from tblSales
UNION
select distinct
cast(concat(DATEPART(YYYY, GETDATE()),'-',DATEPART(MM,GETDATE()),'-','09') as DATE) as salesdate
from tblSales
UNION
select distinct
cast(concat(DATEPART(YYYY, GETDATE()),'-',DATEPART(MM,GETDATE()),'-','10') as DATE) as salesdate
from tblSales
UNION
select distinct
cast(concat(DATEPART(YYYY, GETDATE()),'-',DATEPART(MM,GETDATE()),'-','11') as DATE) as salesdate
from tblSales
UNION
select distinct
cast(concat(DATEPART(YYYY, GETDATE()),'-',DATEPART(MM,GETDATE()),'-','12') as DATE) as salesdate
from tblSales
UNION
select distinct
cast(concat(DATEPART(YYYY, GETDATE()),'-',DATEPART(MM,GETDATE()),'-','13') as DATE) as salesdate
from tblSales
UNION
select distinct
cast(concat(DATEPART(YYYY, GETDATE()),'-',DATEPART(MM,GETDATE()),'-','14') as DATE) as salesdate
from tblSales
UNION
select distinct
cast(concat(DATEPART(YYYY, GETDATE()),'-',DATEPART(MM,GETDATE()),'-','15') as DATE) as salesdate
from tblSales
UNION
select distinct
cast(concat(DATEPART(YYYY, GETDATE()),'-',DATEPART(MM,GETDATE()),'-','16') as DATE) as salesdate
from tblSales
UNION
select distinct
cast(concat(DATEPART(YYYY, GETDATE()),'-',DATEPART(MM,GETDATE()),'-','17') as DATE) as salesdate
from tblSales
UNION
select distinct
cast(concat(DATEPART(YYYY, GETDATE()),'-',DATEPART(MM,GETDATE()),'-','18') as DATE) as salesdate
from tblSales
UNION
select distinct
cast(concat(DATEPART(YYYY, GETDATE()),'-',DATEPART(MM,GETDATE()),'-','19') as DATE) as salesdate
from tblSales
UNION
select distinct
cast(concat(DATEPART(YYYY, GETDATE()),'-',DATEPART(MM,GETDATE()),'-','20') as DATE) as salesdate
from tblSales
UNION
select distinct
cast(concat(DATEPART(YYYY, GETDATE()),'-',DATEPART(MM,GETDATE()),'-','21') as DATE) as salesdate
from tblSales
UNION
select distinct
cast(concat(DATEPART(YYYY, GETDATE()),'-',DATEPART(MM,GETDATE()),'-','22') as DATE) as salesdate
from tblSales
UNION
select distinct
cast(concat(DATEPART(YYYY, GETDATE()),'-',DATEPART(MM,GETDATE()),'-','23') as DATE) as salesdate
from tblSales
UNION
select distinct
cast(concat(DATEPART(YYYY, GETDATE()),'-',DATEPART(MM,GETDATE()),'-','24') as DATE) as salesdate
from tblSales
UNION
select distinct
cast(concat(DATEPART(YYYY, GETDATE()),'-',DATEPART(MM,GETDATE()),'-','25') as DATE) as salesdate
from tblSales
UNION
select distinct
cast(concat(DATEPART(YYYY, GETDATE()),'-',DATEPART(MM,GETDATE()),'-','26') as DATE) as salesdate
from tblSales
UNION
select distinct
cast(concat(DATEPART(YYYY, GETDATE()),'-',DATEPART(MM,GETDATE()),'-','27') as DATE) as salesdate
from tblSales
UNION
select distinct
cast(concat(DATEPART(YYYY, GETDATE()),'-',DATEPART(MM,GETDATE()),'-','28') as DATE) as salesdate
from tblSales
UNION
select distinct
cast(concat(DATEPART(YYYY, GETDATE()),'-',DATEPART(MM,GETDATE()),'-','29') as DATE) as salesdate
from tblSales
UNION
select distinct
cast(concat(DATEPART(YYYY, GETDATE()),'-',DATEPART(MM,GETDATE()),'-','30') as DATE) as salesdate
from tblSales
UNION
select distinct
cast(concat(DATEPART(YYYY, GETDATE()),'-',DATEPART(MM,GETDATE()),'-','31') as DATE) as salesdate
from tblSales

使用 Tally Table 填写 SQL 中按日期排序的缺失日期

Fill Missing Dates In a Date-Sequenced in SQL using Tally Table

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