Question

在SQL 2016中，我需要使用财务期创建一个列表，但只有from / to available - 它的格式类似于日期但是0mmyyyy，所以前3个数字是月/期，最后4个数字是年。

e.g。 period_from是'0102017'和period_to'0032018'，但是试图恢复包含两者之间的列表？

此外，前三个字符可以转到012或013，因此需要能够轻松更改其他数据库的代码。

Answer 1

这有点复杂。首先，我有一个用户定义的表值函数，它根据开始和结束日期输出一个日历表。你想先创建......

CREATE FUNCTION dbo.udf_calendar (@datestart smalldatetime, @dateend smalldatetime)
RETURNS @calendar TABLE (
  [day] int,
  [date] smalldatetime
)
AS

BEGIN

  DECLARE @rows int
  DECLARE @i int = 1

  SELECT
    @rows = DATEDIFF(DAY, @datestart, @dateend)

  WHILE (@i <= @rows)
  BEGIN

    INSERT INTO @calendar ([day])
      VALUES (@i)

    SET @i = @i + 1

  END

  UPDATE a
  SET [date] = DATEADD(DAY, [day] - 1, @datestart)
  --select *, DATEADD(day,id-1,@datestart)
  FROM @calendar a

  RETURN
END

然后，以下内容将为您提供我认为您正在寻找的输出。我已经评论过试图解释我是如何到达那里的，但它仍然可能有点难以理解......

--Create temp table example with your period from and to.

IF (SELECT
    OBJECT_ID('tempdb..#example'))
  IS NOT NULL
  DROP TABLE #example

SELECT
  '0102017' periodfrom,
  '0032018' periodto INTO #example

/*

This is the difficult part. Basically you're inner joining the calendar
to the temp table where the dates are between the manipulated period from and to.
I've added an extra column formatted to allow ordering correctly by period.

*/

SELECT DISTINCT
  periodfrom,
  periodto,
  RIGHT('00' + CAST(DATEPART(MONTH, [date]) AS varchar(50)), 3) + CAST(DATEPART(YEAR, [date]) AS varchar(50)) datefill,
   CAST(DATEPART(YEAR, [date]) AS varchar(50)) + RIGHT('00' + CAST(DATEPART(MONTH, [date]) AS varchar(50)), 3) datefill2
FROM dbo.udf_calendar('2015-01-01', '2018-12-31') a
INNER JOIN #example b
  ON a.[date] BETWEEN SUBSTRING(periodfrom, 2, 2) + '-01-' + SUBSTRING(periodfrom, 4, 4) AND SUBSTRING(periodto, 2, 2) + '-01-' + SUBSTRING(periodto, 4, 4)
ORDER BY datefill2

Answer 2

我不完全确定您想要使用此列表，但是您可以在计数表和一些常用表表达式的帮助下获取所有period值。

-- Test data
declare @p table(PeriodFrom nvarchar(10),PeriodTo nvarchar(10));
insert into @p values('0102017','0032018'),('0052018','0112018');

-- Specify the additional periods you want to include, use 31st December for correct sorting
declare @e table(ExtraPeriodDate date
                ,ExtraPeriodText nvarchar(10)
                );
insert into @e values('20171231','0132017');

                        -- Convert start and end of periods to dates
with m    as (select cast(min(right(PeriodFrom,4) + substring(PeriodFrom,2,2)) + '01' as date) as MinPeriod
                    ,cast(max(right(PeriodTo,4) + substring(PeriodTo,2,2)) + '01' as date) as MaxPeriod
              from @p
             )          -- Built a tally table of dates to join from
    ,t(t) 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)
    ,d(d) as (select top (select datediff(month,MinPeriod,MaxPeriod)+1 from m) dateadd(m,row_number() over (order by (select null))-1,m.MinPeriod) from m, t t1, t t2, t t3, t t4, t t5)
                        -- Use the tally table to convert back to your date period text format
    ,p    as (select d.d as PeriodDate
                    ,'0' + right('00' + cast(month(d) as nvarchar(2)),2) + cast(year(d) as nvarchar(4)) as PeriodText
              from d
              union all -- and add in any of the addition '13th' month periods you specified previously
              select ExtraPeriodDate
                      ,ExtraPeriodText
              from @e
             )
select PeriodText
from p
order by PeriodDate;

输出：

+------------+
| PeriodText |
+------------+
|    0102017 |
|    0112017 |
|    0122017 |
|    0132017 |
|    0012018 |
|    0022018 |
|    0032018 |
|    0042018 |
|    0052018 |
|    0062018 |
|    0072018 |
|    0082018 |
|    0092018 |
|    0102018 |
|    0112018 |
+------------+

如果这不是您所需要的，那么它应该让您按照函数的结果生成这些值，或者根据您的注释使用for xml将其连接到一个列表中通过将最终select语句更改为：

来获得结果

select stuff((select ', ' + PeriodText
              from p
              order by PeriodDate
              for xml path('')
             )
             ,1,2,'') as PeriodTexts;

哪个输出：

+---------------------------------------------------------------------------------------------------------------------------------------+
|                                                              PeriodTexts                                                              |
+---------------------------------------------------------------------------------------------------------------------------------------+
| 0102017, 0112017, 0122017, 0132017, 0012018, 0022018, 0032018, 0042018, 0052018, 0062018, 0072018, 0082018, 0092018, 0102018, 0112018 |
+---------------------------------------------------------------------------------------------------------------------------------------+

财务期间的清单编号顺序

2 个答案: