Generate Dates between date ranges

问题

I need to populate a table that will store the date ranges between 2 given dates: 09/01/11 - 10/10/11

So in this case the table would start from 09/01/11 and store each day till it got to 10/10/11 I was wondering if there was a slick way of doing this in SQL Server - I am currently using SQL Server 2008. Thanks

回答1:

Easy on SQL 2005+; easier if you have a numbers or tally table. I faked it below:

DECLARE @StartDate DATE = '20110901'
  , @EndDate DATE = '20111001'

SELECT  DATEADD(DAY, nbr - 1, @StartDate)
FROM    ( SELECT    ROW_NUMBER() OVER ( ORDER BY c.object_id ) AS Nbr
          FROM      sys.columns c
        ) nbrs
WHERE   nbr - 1 <= DATEDIFF(DAY, @StartDate, @EndDate)

If you have a tally table, replace the subquery with the table. No recursion.

回答2:

Try this if you are using SQL Server 2005 or newer:

WITH Dates AS (
        SELECT
         [Date] = CONVERT(DATETIME,'09/01/2011')
        UNION ALL SELECT
         [Date] = DATEADD(DAY, 1, [Date])
        FROM
         Dates
        WHERE
         Date < '10/10/2011'
) SELECT
 [Date]
FROM
 Dates
 OPTION (MAXRECURSION 45)

A good example of cool stuff you can do with a CTE.

回答3:

-- Declarations

DECLARE @dates TABLE(dt datetime)    
DECLARE @dateFrom datetime
DECLARE @dateTo datetime

SET @dateFrom = '2001/01/01'
SET @dateTo = '2001/01/12'

-- Query:

WHILE(@dateFrom < @dateTo)
BEGIN
   SELECT @dateFrom = DATEADD(day, 1,@dateFrom)
   INSERT INTO @dates 
   SELECT @dateFrom
END

-- Output

SELECT * FROM @dates

回答4:

Here is a solution that does not require recursion, and at the same time, this table-valued function is re-usable in many queries without the need to repeat the declaration of boilerplate variables again. This is the only alternative, for those who don't want recursion.

Create this simple function:

CREATE FUNCTION [dbo].[GenerateDateRange]
(@StartDate AS DATE,
 @EndDate AS   DATE,
 @Interval AS  INT
)
RETURNS @Dates TABLE(DateValue DATE)
AS
BEGIN
    DECLARE @CUR_DATE DATE
    SET @CUR_DATE = @StartDate
    WHILE @CUR_DATE <= @EndDate BEGIN
        INSERT INTO @Dates VALUES(@CUR_DATE)
        SET @CUR_DATE = DATEADD(DAY, @Interval, @CUR_DATE)
    END
    RETURN;
END;

And then select by:

select *
from dbo.GenerateDateRange('2017-01-03', '2017-12-01', 1)

回答5:

Use MVJ's F_TABLE_DATE function, it is purely awesome:

http://www.sqlteam.com/forums/topic.asp?TOPIC_ID=61519

Once you implement this just pass in start and end date and you can insert all dates between.

回答6:

Using @Abe Miesler's answer, for other's convenience I built it into a TVF for SQL Server 2008 onwards. It may help others - I had to find a way to include the CTE inside the TVF!

    --Generate a range of dates with interval option, courtesy of Abe Miessler for the core query here!
ALTER FUNCTION [dbo].[DateRange]
(@startDate AS DATE,
 @EndDate AS   DATE,
 @interval AS  INT
)
RETURNS @Dates TABLE(dateValue DATE)
AS
     BEGIN
         WITH Dates
              AS (
              SELECT [Date] = CONVERT( DATETIME, @startDate)
              UNION ALL
              SELECT [Date] = DATEADD(DAY, ISNULL(@interval, 1), [Date])
              FROM Dates
              WHERE Date < @EndDate)
              INSERT INTO @Dates
                     SELECT [Date]
                     FROM Dates
                     OPTION(MAXRECURSION 900);
         RETURN;
     END;

回答7:

Declare @StartDate datetime = '2015-01-01'
Declare @EndDate datetime = '2016-12-01'
declare @DaysInMonth int
declare @tempDateRange Table
(
DateFrom datetime,
DateThru datetime
);

While @StartDate<=@EndDate
begin
    SET @DaysInMonth=DAY(DATEADD(DD,-1,DATEADD(MM,DATEDIFF(MM,-1,@StartDate),0)))

    IF DAY(@StartDate)=1 
        SET @EndDate=DATEADD(DAY,14,@StartDate)
    ELSE IF DAY(@StartDate)=16 AND @DaysInMonth=30
        SET @EndDate=DATEADD(DAY,14,@StartDate)
    ELSE IF DAY(@StartDate)=16 AND @DaysInMonth=31
        SET @EndDate=DATEADD(DAY,15,@StartDate)
    ELSE IF DAY(@StartDate)=16 AND @DaysInMonth=28
        SET @EndDate=DATEADD(DAY,12,@StartDate)
    ELSE IF DAY(@StartDate)=16 AND @DaysInMonth=29
        SET @EndDate=DATEADD(DAY,13,@StartDate)

    INSERT INTO @tempDateRange (DateFrom,DateThru)
    VALUES 
     (
        @StartDate,
        @EndDate
     )

    SET @StartDate=DATEADD(DAY,1,@EndDate)

    IF @EndDate< '2016-12-31'
     IF DAY(@StartDate)=1 
        SET @EndDate=DATEADD(DAY,14,@StartDate)
     ELSE IF DAY(@StartDate)=16 AND @DaysInMonth=30
        SET @EndDate=DATEADD(DAY,14,@StartDate)
     ELSE IF DAY(@StartDate)=16 AND @DaysInMonth=31
        SET @EndDate=DATEADD(DAY,15,@StartDate)
     ELSE IF DAY(@StartDate)=16 AND @DaysInMonth=28
        SET @EndDate=DATEADD(DAY,12,@StartDate)
     ELSE IF DAY(@StartDate)=16 AND @DaysInMonth=29
        SET @EndDate=DATEADD(DAY,13,@StartDate)
end ;

select * from @tempDateRange

+++++++++++++++++++++++++++++
Result:
DateFrom |DateThru

回答8:

If for some reason you can't declare variables, such as when using derived tables in Looker, you can go like this:

select
  dateadd(day, nbr - 1, convert(date, '2017-01-01')) as d
from (
  select row_number() over (order by c.object_id) as nbr from sys.columns c
) nbrs
where
  nbr - 1 <= datediff(
    day,
    convert(date, '2017-01-01'),
    convert(date, '2018-12-31')
  )

By the way, this is how your date series view could look like in LookerML:

view: date_series {
  derived_table: {
    sql:
      select
        dateadd(day, nbr - 1, convert(date, '2017-01-01')) as d
      from (
        select row_number() over (order by c.object_id) as nbr from sys.columns c
      ) nbrs
      where
        nbr - 1 <= datediff(day, convert(date, '2017-01-01'), convert(date, '2018-12-31')) ;;
  }

  dimension: date {
    primary_key: yes
    type: date
    sql: ${TABLE}.d ;;
  }
}

回答9:

CREATE table #ProductSales (ProjectID Int, ProjectName varchar(100), TotalBillableFees Money, StartDate Date, EndDate Date, DataDate Date)

  Insert into #ProductSales
  Values
  (373104,'Product Sales - Flex Creation Test',40000.00,'2019-04-01','2020-06-01','2019-08-01'),
  (375111,'Product Sales - SMART',40000.00,'2019-04-01','2019-09-01','2019-08-01')

  ;WITH Dates AS (
        SELECT ProjectiD
        ,Convert(decimal(10,2),TotalBillableFees/IIF(DATEDIFF(MONTH,StartDate,EndDate)=0,1,DATEDIFF(MONTH,StartDate,EndDate))) AS BillableFeesPerMonths,EndDate
         ,[Date] = CONVERT(DATETIME,EOMONTH(StartDate))
         FROM #ProductSales
        UNION ALL SELECT ProjectiD,BillableFeesPerMonths,EndDate,
         [Date] = DATEADD(MONTH, 1, [Date])
        FROM
         Dates
        WHERE
         Date < EOMONTH(EndDate)
) SELECT ProjectID,BillableFeesPerMonths,
 CAST([Date] as Date) Date
FROM
 Dates
 OPTION (MAXRECURSION 45)

回答10:

I realize that this is an old thread, but I have to admit my dismay at the overabundance of recursive and looping solutions given here. I wonder just how many folks realize that recursion is nothing more than a very expensive loop? I understand the desire to create a Table-Valued Function, but I suggest that the following is far more efficient as it is set-based, without looping, recursion, or repeated single insert statements:

CREATE FUNCTION dbo.GenerateDateRange(@StartDate AS DATE, @EndDate AS DATE)
RETURNS TABLE WITH SCHEMABINDING AS
    WITH e1(n) AS (VALUES (1),(1),(1),(1),(1),(1),(1),(1),(1),(1),(1),(1),(1),(1),(1),(1)) AS x(n)) -- 16 records
        ,e2(n) AS (SELECT 1 FROM e1 a CROSS JOIN e1 b) -- 16^2 or 256 records (16*16)
        ,cteTally(n) AS (SELECT ROW_NUMBER() over (ORDER BY 1) AS n FROM e2 a CROSS JOIN e2 b) -- 16^4 or 65,536 records (256*256)
    SELECT DATEADD(DAY, n-1, @StartDate)
    FROM cteTally
    WHERE n <= DATEDIFF(DAY, @StartDate, @EndDate) + 1;
GO

来源：https://stackoverflow.com/questions/7824831/generate-dates-between-date-ranges

标签

sql

sql-server

tsql

sql-server-2008

range