如何编写t-sql以日历格式显示当前月份？
输出应该像
sun mon tues wed thur fri sat
1 2 3 4 5
6 7 8 9 10 11 12
13 14 15 ................
应该提供当月的日历
这是我到目前为止所拥有的
declare @start int
declare @day int
declare @space varchar(100)
declare @nodays int
select @start=1
select @space=''
select @nodays=datediff(dd,getdate(),dateadd(mm,1,getdate()))
select @day=case datename(dw,cast(year(getdate()) as varchar(10)) + '-' +cast(month(getdate()) as varchar(10)) + '-' +cast(day(getdate()) as varchar(10))) when 'Sunday' then 1 when 'Monday' then 2 when 'tuesday' then 3 when 'wednesday' then 4 when 'thursday' then 5 when 'friday' then 6 when 'saturday' then 7 end
while(@start<=@nodays)
if(@day=1)
if(len(@space)=0)
select @space=cast(@start as varchar(10))
else
select @space=@space+' '+
case when len(cast(@start as varchar(10)))=1
then ' '
else ''
end +
cast(@start as varchar(10))
else
if(len(@space)=0)
select @space=@space+
replicate(char(10),@start) +
case when len(cast(@start as varchar(10)))=1
then ' '
else ''
end +
cast(@start as varchar(10))
else
select @space=@space+char(10) + case when len(cast(@start as varchar(10)))=1 then ' ' else '' end +cast(@start as varchar(10))
select @start=@start+1
print @space+char(10)
答案 0 :(得分：3)
如果愿意，可以将getdate（）更改为本地声明的变量。
;with monthDates
as
(
select DATEADD(month, datediff(month, 0, getdate()),0) as d
,DATEPART(week, DATEADD(month, datediff(month, 0, getdate()),0)) as w
union all
select DATEADD(day, 1, d)
,DATEPART(week, DATEADD(day, 1, d))
from monthDates
where d < DATEADD(month, datediff(month, 0, getdate())+1,-1)
)
select max(case when datepart(dw, d) = 1 then datepart(d,d) else null end) as [Sun]
,max(case when datepart(dw, d) = 2 then datepart(d,d) else null end) as [Mon]
,max(case when datepart(dw, d) = 3 then datepart(d,d) else null end) as [Tue]
,max(case when datepart(dw, d) = 4 then datepart(d,d) else null end) as [Wed]
,max(case when datepart(dw, d) = 5 then datepart(d,d) else null end) as [Thu]
,max(case when datepart(dw, d) = 6 then datepart(d,d) else null end) as [Fri]
,max(case when datepart(dw, d) = 7 then datepart(d,d) else null end) as [Sat]
from monthDates
group by w
答案 1 :(得分：1)
我不知道你到底想要做什么。使用T-SQL打印日历月可能不是您想要做的。
这是一个查询，它为您提供当月内的所有日期作为结果集。如果你只想要一个月的日期编号（就像你一样），你可以使用datepart(d, [Date])来获得它。
;with cteLim as
(
select
dateadd(m, datediff(m, 0, getdate()), 0) as FirstDay,
dateadd(m, datediff(m, 0, getdate())+1, 0)-1 as LastDay
),
cteDays as
(
select FirstDay as [Date]
from cteLim
union all
select cteDays.[Date] + 1 as [Date]
from cteDays
inner join cteLim
on cteDays.[Date] < cteLim.LastDay
)
select [Date]
from cteDays
相同的功能，但将结果拆分为“日历”
;with cteLim as
(
select
dateadd(m, datediff(m, 0, getdate()), 0) as FirstDay,
dateadd(m, datediff(m, 0, getdate())+1, 0)-1 as LastDay
),
cteDays as
(
select FirstDay as [Date]
from cteLim
union all
select cteDays.[Date] + 1 as [Date]
from cteDays
inner join cteLim
on cteDays.[Date] < cteLim.LastDay
)
select
datepart(iso_week, [Date]) as [Week],
(select datepart(d, D2.[Date])
from cteDays as D2
where
datepart(iso_week, D2.[Date]) = datepart(iso_week, D1.[Date]) and
datepart(dw, D2.[Date]) = 2) as Mon,
(select datepart(d, D2.[Date])
from cteDays as D2
where
datepart(iso_week, D2.[Date]) = datepart(iso_week, D1.[Date]) and
datepart(dw, D2.[Date]) = 3) as Tue,
(select datepart(d, D2.[Date])
from cteDays as D2
where
datepart(iso_week, D2.[Date]) = datepart(iso_week, D1.[Date]) and
datepart(dw, D2.[Date]) = 4) as Wed,
(select datepart(d, D2.[Date])
from cteDays as D2
where
datepart(iso_week, D2.[Date]) = datepart(iso_week, D1.[Date]) and
datepart(dw, D2.[Date]) = 5) as Thu,
(select datepart(d, D2.[Date])
from cteDays as D2
where
datepart(iso_week, D2.[Date]) = datepart(iso_week, D1.[Date]) and
datepart(dw, D2.[Date]) = 6) as Fri,
(select datepart(d, D2.[Date])
from cteDays as D2
where
datepart(iso_week, D2.[Date]) = datepart(iso_week, D1.[Date]) and
datepart(dw, D2.[Date]) = 7) as Sat,
(select datepart(d, D2.[Date])
from cteDays as D2
where
datepart(iso_week, D2.[Date]) = datepart(iso_week, D1.[Date]) and
datepart(dw, D2.[Date]) = 1) as Sun
from cteDays as D1
group by datepart(iso_week, [Date])
结果
Week Mon Tue Wed Thu Fri Sat Sun
----------- ----------- ----------- ----------- ----------- ----------- ----------- -----------
9 NULL 1 2 3 4 5 6
10 7 8 9 10 11 12 13
11 14 15 16 17 18 19 20
12 21 22 23 24 25 26 27
13 28 29 30 31 NULL NULL NULL
答案 2 :(得分：1)
忘记你的'程序代码来制作动态日历'方法：SQL是一种声明性语言，所以请考虑基于集合的解决方案。
创建一个永久Calendar表，其中包含您可能需要的所有过去和未来日期（应该只有几万行），然后在需要时使用CURRENT_TIMESTAMP查询此表。
答案 3 :(得分：1)
select DATEPART(MONTH,getdate()) - 获取月号
select Datename(month,getdate()) - 获取月份名称
答案 4 :(得分：0)
这里有一个链接：Creating a Calendar in a single SQL statement
SELECT LPAD(MONTH, 20 - (20 - LENGTH(MONTH)) / 2) MONTH, "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
FROM (SELECT TO_CHAR(dt, 'fmMonthfm YYYY') MONTH,
TO_CHAR(dt + 1, 'iw') week,
MAX(DECODE(TO_CHAR(dt, 'd'), '1', LPAD(TO_CHAR(dt, 'fmdd'), 2))) "Sun",
MAX(DECODE(TO_CHAR(dt, 'd'), '2', LPAD(TO_CHAR(dt, 'fmdd'), 2))) "Mon",
MAX(DECODE(TO_CHAR(dt, 'd'), '3', LPAD(TO_CHAR(dt, 'fmdd'), 2))) "Tue",
MAX(DECODE(TO_CHAR(dt, 'd'), '4', LPAD(TO_CHAR(dt, 'fmdd'), 2))) "Wed",
MAX(DECODE(TO_CHAR(dt, 'd'), '5', LPAD(TO_CHAR(dt, 'fmdd'), 2))) "Thu",
MAX(DECODE(TO_CHAR(dt, 'd'), '6', LPAD(TO_CHAR(dt, 'fmdd'), 2))) "Fri",
MAX(DECODE(TO_CHAR(dt, 'd'), '7', LPAD(TO_CHAR(dt, 'fmdd'), 2))) "Sat"
FROM (SELECT TRUNC(SYSDATE, 'y') - 1 + ROWNUM dt
FROM all_objects
WHERE ROWNUM <= ADD_MONTHS(TRUNC(SYSDATE, 'y'), 12) -
TRUNC(SYSDATE, 'y'))
GROUP BY TO_CHAR(dt, 'fmMonthfm YYYY'), TO_CHAR(dt + 1, 'iw'))
ORDER BY TO_DATE(MONTH, 'Month YYYY'), TO_NUMBER(week);
您可以添加一些子句来指定月份
答案 5 :(得分：0)
DECLARE @Year int, @Month int, @LastDay int;
SET @Year = 2011;
SET @Month = 2;
SET @LastDay = DAY(DATEADD(m, 1, CAST(@Year AS varchar) + '-' +
CAST(@Month AS varchar) + '-01') - 1);
WITH dates AS (
SELECT *, DOW = DATEPART(WEEKDAY, Date), WN = DATEPART(WEEK, Date)
FROM (
SELECT
Date = CAST(CAST(@Year AS varchar) + '-' +
CAST(@Month AS varchar) + '-' +
CAST(number AS varchar) AS datetime)
FROM master..spt_values
WHERE type = 'P'
AND number BETWEEN 1 AND @LastDay
) s
)
SELECT
Sun = MAX(CASE days.DOW WHEN 1 THEN dates.Date END),
Mon = MAX(CASE days.DOW WHEN 2 THEN dates.Date END),
Tue = MAX(CASE days.DOW WHEN 3 THEN dates.Date END),
Wed = MAX(CASE days.DOW WHEN 4 THEN dates.Date END),
Thu = MAX(CASE days.DOW WHEN 5 THEN dates.Date END),
Fri = MAX(CASE days.DOW WHEN 6 THEN dates.Date END),
Sat = MAX(CASE days.DOW WHEN 7 THEN dates.Date END)
FROM (SELECT DISTINCT DOW FROM dates) days
CROSS JOIN (SELECT DISTINCT WN FROM dates) weeks
LEFT JOIN dates ON weeks.WN = dates.WN AND days.DOW = dates.DOW
GROUP BY weeks.WN