How can I list all dates between two date paramete

问题:

How can I list all dates between two date parameters in SQL Server, without creating a stored procedure, calendar table or recursive function?

回答1:

There's always the recursive CTE option:

DECLARE @STARTDATE DATETIME
DECLARE @ENDDATE DATETIME

SET @STARTDATE = '2015-01-01'
SET @ENDDATE = '2015-12-31'

;WITH DATE_RANGE (DATES) AS (
    SELECT DATEADD(DAY, DATEDIFF(DAY, 0, @STARTDATE), 0)
        UNION ALL SELECT DATEADD(DAY, 1, DATES)
            FROM DATE_RANGE
            WHERE DATEADD(DAY, 1, DATES) <= @ENDDATE)
SELECT DATES
FROM DATE_RANGE
OPTION (MAXRECURSION 0)

Be sure to use the MAXRECURSION option, or your results will be limited to 100 as default.

回答2:

This uses Row_Number on the spt_values table in Master database to create a list of years, months and dates within the date range. This is then built into a datetime field, and filtered to only return dates within the date parameters entered.

Very quick to execute and returns 500 years worth of dates (182987 days) in less than 1 second.

Declare @DateFrom datetime = '2000-01-01'
declare @DateTo datetime = '2500-12-31'
Select
*
From
    (Select
    CAST(CAST(years.Year AS varchar) + '-' + CAST(Months.Month AS varchar) + '-' + CAST(Days.Day AS varchar) AS DATETIME) as Date

    From
    (select row_number() over(order by number) as Year from master.dbo.spt_values) as Years
    join (select row_number() over(order by number) as Month from master.dbo.spt_values) as Months on 1 = 1
    join (select row_number() over(order by number) as Day from master.dbo.spt_values) as Days on 1 = 1
    Where 
    Years.Year between datepart(year,@DateFrom) and datepart(year,@DateTo)
    and Months.Month between 1 and 12
    and 
    Days.Day between 1 and datepart(day,dateadd(day,-1,dateadd(month,1,(CAST(CAST(Years.Year AS varchar)+'-' + CAST(Months.Month AS varchar) + '-01' AS DATETIME)))))
    ) as Dates
Where Dates.Date between @DateFrom and @DateTo

order by 1

回答3:

Following will be a solution for YOU

DECLARE @DATE1 DATE
DECLARE @DATE2 DATE
SET @DATE1 ='20020101'
SET @DATE2 = '20020311'
SELECT @DATE1 as t
into #FromDate
DECLARE cur CURSOR FOR 
SELECT t FROM #FromDate
OPEN cur
FETCH NEXT FROM cur INTO @DATE1
WHILE(@@FETCH_STATUS=0)
BEGIN
IF(@DATE1<=@DATE2)
INSERT INTO #FromDate
VALUES(DATEADD(DAY,1,@DATE1))
FETCH NEXT FROM cur INTO @DATE1
END
CLOSE cur
DEALLOCATE cur;
SELECT t FROM #FromDate;
DROP TABLE #FromDate;

回答4:

Simple result.

DECLARE @DATE1 DATE
DECLARE @DATE2 DATE
SET @DATE1 ='20020101'
SET @DATE2 = '20020311'

WHILE(@DATE1<=@DATE2)
Begin
PRINT @DATE1
set @DATE1 = DATEADD(dd,1,@DATE1)
END