整理了SQL Server中是实现日历的几个方法

来源：这里教程网时间：2026-03-02 10:30:36 作者：

create function fn_Calendar(@year int, @month int)

returns nvarchar(max)

begin

declare @result nvarchar(max), @Enter nvarchar(8)

select @Enter = char(13)+char(10), @result = \' Sun Mon The Wed Thu Fri Sta\' + @Enter --表头

declare @start datetime, @end datetime

select @start = rtrim(@year)+\'-\'+rtrim(@month)+\'-1\', @end = dateadd(mm, 1, @start)

set @result = @result+replicate(\' \', (datepart(dw, @start)+@@datefirst+6)%7) --第一行前面的空格

while datediff(d, @start, @end)>0

begin

if (datepart(dw, @start)+@@datefirst)%7 = 1

select @result = @result+@Enter --是否换行

select @result = @result+right(\' \'+rtrim(day(@start)), 4), @start = dateadd(d, 1, @start)

end

return @result

end

set datefirst 3

print dbo.fn_Calendar(2007, 12)

select dbo.fn_Calendar(2007, 12)

set datefirst 7

drop function dbo.fn_Calendar

Sun Mon The Wed Thu Fri Sta

2 3 4 5 6 7 8

9 10 11 12 13 14 15

16 17 18 19 20 21 22

23 24 25 26 27 28 29

30 31

------------------------------------------

Sun Mon The Wed Thu Fri Sta

2 3 4 5 6 7 8

9 10 11 12 13 14 15

16 17 18 19 20 21 22

23 24 25 26 27 28 29

30 31

(1 row(s) affected)

-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

create function F_month(@YMonth nvarchar(6))
returns @T table(日 varchar(4),一 varchar(4),二 varchar(4),三 varchar(4),四 varchar(4),五 varchar(4),六 varchar(4))
as
begin
    declare @Tmp table([weekday] int,[day] nvarchar(2),[group] int)---增加一列作为分组显示

    declare @i int,@j int,@date datetime,@group int
    select @date=@YMonth+\'01\',@i=datediff(dd,@date,dateadd(month,1,@date)),@j=0,@group=0
    while @i>@j
    begin
        insert @Tmp select (datepart(dw,@date)+@@datefirst-1)%7,datepart(d,@date),case when (datepart(dw,@date)+@@datefirst-1)%7=0 then @group+1 else @group end
        select @j=@j+1,@group=case when (datepart(dw,@date)+@@datefirst-1)%7=0 then @group+1 else @group end,@date=dateadd(dd,1,@date)
    end
    insert @T
    select
        max(case when [weekday]=0 then [day] else \'\' end),
        max(case when [weekday]=1 then [day] else \'\' end),
        max(case when [weekday]=2 then [day] else \'\' end),
        max(case when [weekday]=3 then [day] else \'\' end),
        max(case when [weekday]=4 then [day] else \'\' end),
        max(case when [weekday]=5 then [day] else \'\' end),
        max(case when [weekday]=6 then [day] else \'\' end)
    from
        @Tmp
    group by [group]
    return
end

go
select * from F_month(\'0712\')
或:
select * from F_month(\'200712\')

---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

数据库应该创建一个日历表

CREATE TABLE Calendar(
date datetime NOT NULL PRIMARY KEY CLUSTERED,
weeknum int NOT NULL,
weekday int NOT NULL,
weekday_desc nchar(3) NOT NULL,
is_workday bit NOT NULL,
is_weekend bit NOT NULL
)
GO
WITH CTE1 AS(
SELECT
  date = DATEADD(day,n,'19991231')
FROM Nums
WHERE n <= DATEDIFF(day,'19991231','20201231')),
CTE2 AS(
SELECT
  date,
  weeknum = DATEPART(week,date),
  weekday = (DATEPART(weekday,date) + @@DATEFIRST - 1) % 7,
  weekday_desc = DATENAME(weekday,date)
FROM CTE1)
--INSERT INTO Calendar
SELECT
date,
weeknum,
weekday,
weekday_desc,
is_workday = CASE WHEN weekday IN (0,6) THEN 0 ELSE 1 END,
is_weekend = CASE WHEN weekday IN (0,6) THEN 1 ELSE 0 END
FROM CTE2