1

我的工作要求我必须从特定日期开始计算 6 到 18 个月。我有2个例子。示例 1：我的工作要求我计算来自客户的退款。这些退款一次只能是 18 个月，退款期的最后日期是信件寄给客户的日期。那么，如果退款信设定在 2012 年 8 月 28 日寄出，那么该期限的第一个日期是什么时候？另外，如果是 8 月 29 日、30 日和 31 日（2012 年 8 月 28 日 - 2012 年 8 月 31 日）。我的计算会说所有这些时间段的开始日期都是 2011 年 3 月 1 日。我使用 SAS 作为程序工具。这是我使用的功能：

 eighteen_months = intnx('month',Visit_date,18,'sameday')+1;

我所做的主要假设是 1 个月等于第一个月的第一个日期和最后一个日期以及同一个月（2012 年 1 月 1 日至 2012 年 1 月 31 日）。随后，3 个月等于第一个月的第一个日期和第三个月的最后一个日期（2012 年 1 月 1 日至 2012 年 3 月 31 日或 2012 年 4 月 1 日至 2012 年 6 月 30 日）。以下是其他 18 个月的计算： 

                First Date           Last Date
                10/30/1999           4/29/2001
                 5/6/2006            11/5/2007
                4/30/2012           10/29/2013
                 4/3/2018            10/2/2019
                  2/24/2024          8/23/2025
                  5/10/2026          11/9/2027

这个问题发生在我最初的例子中，8 月 28 日至 31 日，其中 18 个月实际上可以是 4 个不同的时间长度。

示例 2：我的工作还要求我在第一次约会时做相反的事情，并且需要找出 6 到 18 个月的时间段。最近有人问我，如果第一个日期是 2012 年 6 月 22 日，那么 6 个月是多少个月？我回复了 2012 年 12 月 21 日，并被告知实际上是 2012 年 12 月 22 日。没有关于公司如何计算的真实文档/逻辑。这是我在 SAS 中的功能。

    Six_months = intnx('month',Visit_date,6,'sameday')-1;

我正在尝试建立一个流程，并想看看是否有人在一致的基础上遇到这些流程，以及 Excel/SAS 中是否有更简单的方法。任何回应将不胜感激。

4

3 回答 3

2

要从 Excel 中的最后日期获取第一个日期，请尝试使用最后日期在 B2 中的公式

=EDATE(B2,-18)+1

这适用于您列出的 6 个示例，也适用于 2011 年 3 月 1 日从 2012 年 8 月 28/29/30/31 日返回

EDATE 函数，正如您可能猜到的那样，可用于从日期中添加或减去月份数，如果该日期在该月内不存在，例如 2 月 30 日，则默认为该月的最后一天

于 2012-10-01T19:25:11.653 回答
0

许多数据库支持该功能add_months或dateadd类似的东西（包括 Teradata）。要获得提前或推迟 18 个月的日期，您可以执行以下操作：

select add_months(LastDate, -18), LastDate

我认为这回答了前面的问题。答案问题有点棘手，因为有多个日期。您可以使用以下技巧获取第一个和最后一个此类日期：

select add_months(FirstDate, 18) as LastDate1,
       add_months(FirstDate+1, 18) - 1 as LastDate2

也就是说， add_months 返回符合未来 18 个月条件的第一天（我对此非常确定，但对 Teradata 来说不是 100% 肯定）。第二个日期是18个月前的一天后的第二天。通常它与第一次约会相同，但并非总是如此。

于 2012-10-01T19:35:44.523 回答
0

这是洛林和丹的蛮力方式

%MACRO DATES(YEAR, lib);
data post.try&lib.; set post.pact;
IF DTE_EFFECTIVE LE &year. LE DTE_END  THEN DO ELIGMONTH= &year.; FORMAT ELIGMONTH MMDDYY10.; OUTPUT post.TRY&lib.;  END;
run;
%MEND;
%DATES (YEAR='01JAN2000'D, LIB=a)
%DATES (YEAR='01FEB2000'D, LIB=b)
%DATES (YEAR='01MAR2000'D, LIB=c)
%DATES (YEAR='01APR2000'D, LIB=d)
%DATES (YEAR='01MAY2000'D, LIB=e)
%DATES (YEAR='01JUN2000'D, LIB=f)
%DATES (YEAR='01JUL2000'D, LIB=g)
%DATES (YEAR='01AUG2000'D, LIB=h)
%DATES (YEAR='01SEP2000'D, LIB=i)
%DATES (YEAR='01OCT2000'D, LIB=j)
%DATES (YEAR='01NOV2000'D, LIB=k)
%DATES (YEAR='01DEC2000'D, LIB=l)
%DATES (YEAR='01JAN2001'D, LIB=m)
%DATES (YEAR='01FEB2001'D, LIB=n)
%DATES (YEAR='01MAR2001'D, LIB=o)
%DATES (YEAR='01APR2001'D, LIB=p)
%DATES (YEAR='01MAY2001'D, LIB=q)
%DATES (YEAR='01JUN2001'D, LIB=r)
%DATES (YEAR='01JUL2001'D, LIB=s)
%DATES (YEAR='01AUG2001'D, LIB=t)
%DATES (YEAR='01SEP2001'D, LIB=u)
%DATES (YEAR='01OCT2001'D, LIB=v)
%DATES (YEAR='01NOV2001'D, LIB=w)
%DATES (YEAR='01DEC2001'D, LIB=x)
%DATES (YEAR='01JAN2002'D, LIB=y)
%DATES (YEAR='01FEB2002'D, LIB=z)
%DATES (YEAR='01MAR2002'D, LIB=aa)
%DATES (YEAR='01APR2002'D, LIB=bb)
%DATES (YEAR='01MAY2002'D, LIB=cc)
%DATES (YEAR='01JUN2002'D, LIB=dd)
%DATES (YEAR='01JUL2002'D, LIB=ee)
%DATES (YEAR='01AUG2002'D, LIB=ff)
%DATES (YEAR='01SEP2002'D, LIB=gg)
%DATES (YEAR='01OCT2002'D, LIB=hh)
%DATES (YEAR='01NOV2002'D, LIB=ii)
%DATES (YEAR='01DEC2002'D, LIB=jj)
%DATES (YEAR='01JAN2003'D, LIB=kk)
%DATES (YEAR='01FEB2003'D, LIB=ll)
%DATES (YEAR='01MAR2003'D, LIB=mm)
%DATES (YEAR='01APR2003'D, LIB=nn)
%DATES (YEAR='01MAY2003'D, LIB=oo)
%DATES (YEAR='01JUN2003'D, LIB=pp)
%DATES (YEAR='01JUL2003'D, LIB=qq)
%DATES (YEAR='01AUG2003'D, LIB=rr)
%DATES (YEAR='01SEP2003'D, LIB=ss)
%DATES (YEAR='01OCT2003'D, LIB=tt)
%DATES (YEAR='01NOV2003'D, LIB=uu)
%DATES (YEAR='01DEC2003'D, LIB=vv)
%DATES (YEAR='01JAN2004'D, LIB=ww)
%DATES (YEAR='01FEB2004'D, LIB=xx)
%DATES (YEAR='01MAR2004'D, LIB=yy)
%DATES (YEAR='01APR2004'D, LIB=zz)
%DATES (YEAR='01MAY2004'D, LIB=aa)
%DATES (YEAR='01JUN2004'D, LIB=bb)
%DATES (YEAR='01JUL2004'D, LIB=cc)
%DATES (YEAR='01AUG2004'D, LIB=dd)
%DATES (YEAR='01SEP2004'D, LIB=ee)
%DATES (YEAR='01OCT2004'D, LIB=ff)
%DATES (YEAR='01NOV2004'D, LIB=gg)
%DATES (YEAR='01DEC2004'D, LIB=hh)
%DATES (YEAR='01JAN2005'D, LIB=ii)
%DATES (YEAR='01FEB2005'D, LIB=jj)
%DATES (YEAR='01MAR2005'D, LIB=kk)
%DATES (YEAR='01APR2005'D, LIB=ll)
%DATES (YEAR='01MAY2005'D, LIB=mm)
%DATES (YEAR='01JUN2005'D, LIB=nn)
%DATES (YEAR='01JUL2005'D, LIB=oo)
%DATES (YEAR='01AUG2005'D, LIB=pp)
%DATES (YEAR='01SEP2005'D, LIB=qq)
%DATES (YEAR='01OCT2005'D, LIB=rr)
%DATES (YEAR='01NOV2005'D, LIB=ss)
%DATES (YEAR='01DEC2005'D, LIB=tt)
%DATES (YEAR='01JAN2006'D, LIB=uu)
%DATES (YEAR='01FEB2006'D, LIB=vv)
%DATES (YEAR='01MAR2006'D, LIB=ww)
%DATES (YEAR='01APR2006'D, LIB=xx)
%DATES (YEAR='01MAY2006'D, LIB=yy)
%DATES (YEAR='01JUN2006'D, LIB=zz)
%DATES (YEAR='01JUL2006'D, LIB=aaa)
%DATES (YEAR='01AUG2006'D, LIB=bbb)
%DATES (YEAR='01SEP2006'D, LIB=ccc)
%DATES (YEAR='01OCT2006'D, LIB=ddd)
%DATES (YEAR='01NOV2006'D, LIB=eee)
%DATES (YEAR='01DEC2006'D, LIB=fff)
%DATES (YEAR='01JAN2007'D, LIB=ggg)
%DATES (YEAR='01FEB2007'D, LIB=hhh)
%DATES (YEAR='01MAR2007'D, LIB=iii)
%DATES (YEAR='01APR2007'D, LIB=jjj)
%DATES (YEAR='01MAY2007'D, LIB=kkk)
%DATES (YEAR='01JUN2007'D, LIB=lll)
%DATES (YEAR='01JUL2007'D, LIB=mmm)
%DATES (YEAR='01AUG2007'D, LIB=nnn)
%DATES (YEAR='01SEP2007'D, LIB=ooo)
%DATES (YEAR='01OCT2007'D, LIB=ppp)
%DATES (YEAR='01NOV2007'D, LIB=qqq)
%DATES (YEAR='01DEC2007'D, LIB=rrr)
%DATES (YEAR='01JAN2008'D, LIB=sss)
%DATES (YEAR='01FEB2008'D, LIB=ttt)
%DATES (YEAR='01MAR2008'D, LIB=uuu)
%DATES (YEAR='01APR2008'D, LIB=vvv)
%DATES (YEAR='01MAY2008'D, LIB=www)
%DATES (YEAR='01JUN2008'D, LIB=xxx)
%DATES (YEAR='01JUL2008'D, LIB=yyy)
%DATES (YEAR='01AUG2008'D, LIB=zzz)
%DATES (YEAR='01SEP2008'D, LIB=aaaa)
%DATES (YEAR='01OCT2008'D, LIB=bbbb)
%DATES (YEAR='01NOV2008'D, LIB=cccc)
%DATES (YEAR='01DEC2008'D, LIB=dddd)
%DATES (YEAR='01JAN2009'D, LIB=eeee)
%DATES (YEAR='01FEB2009'D, LIB=ffff)
%DATES (YEAR='01MAR2009'D, LIB=gggg)
%DATES (YEAR='01APR2009'D, LIB=hhhh)
%DATES (YEAR='01MAY2009'D, LIB=iiii)
%DATES (YEAR='01JUN2009'D, LIB=jjjj)
%DATES (YEAR='01JUL2009'D, LIB=kkkk)
%DATES (YEAR='01AUG2009'D, LIB=llll)
%DATES (YEAR='01SEP2009'D, LIB=mmmm)
%DATES (YEAR='01OCT2009'D, LIB=nnnn)
%DATES (YEAR='01NOV2009'D, LIB=oooo)
%DATES (YEAR='01DEC2009'D, LIB=pppp)
%DATES (YEAR='01JAN2010'D, LIB=qqqq)
%DATES (YEAR='01FEB2010'D, LIB=rrrr)
%DATES (YEAR='01MAR2010'D, LIB=ssss)
%DATES (YEAR='01APR2010'D, LIB=tttt)
%DATES (YEAR='01MAY2010'D, LIB=uuuu)
%DATES (YEAR='01JUN2010'D, LIB=vvvv)
%DATES (YEAR='01JUL2010'D, LIB=wwww)
%DATES (YEAR='01AUG2010'D, LIB=xxxx)
%DATES (YEAR='01SEP2010'D, LIB=yyyy)
%DATES (YEAR='01OCT2010'D, LIB=zzzz)
%DATES (YEAR='01NOV2010'D, LIB=aaaaa)
%DATES (YEAR='01DEC2010'D, LIB=bbbbb)
%DATES (YEAR='01JAN2011'D, LIB=ccccc)
%DATES (YEAR='01FEB2011'D, LIB=ddddd)
%DATES (YEAR='01MAR2011'D, LIB=eeeee)
%DATES (YEAR='01APR2011'D, LIB=fffff)
%DATES (YEAR='01MAY2011'D, LIB=ggggg)
%DATES (YEAR='01JUN2011'D, LIB=hhhhh)
%DATES (YEAR='01JUL2011'D, LIB=iiiii)
%DATES (YEAR='01AUG2011'D, LIB=jjjjj)
%DATES (YEAR='01SEP2011'D, LIB=kkkkk)
%DATES (YEAR='01OCT2011'D, LIB=lllll)
%DATES (YEAR='01NOV2011'D, LIB=mmmmm)
%DATES (YEAR='01DEC2011'D, LIB=nnnnn)
%DATES (YEAR='01JAN2012'D, LIB=ooooo)
%DATES (YEAR='01FEB2012'D, LIB=ppppp)
%DATES (YEAR='01MAR2012'D, LIB=qqqqq)
%DATES (YEAR='01APR2012'D, LIB=rrrrr)
%DATES (YEAR='01MAY2012'D, LIB=sssss)
%DATES (YEAR='01JUN2012'D, LIB=ttttt)
%DATES (YEAR='01JUL2012'D, LIB=uuuuu)
%DATES (YEAR='01AUG2012'D, LIB=vvvvv)
%DATES (YEAR='01SEP2012'D, LIB=wwwww)
%DATES (YEAR='01OCT2012'D, LIB=xxxxx)
%DATES (YEAR='01NOV2012'D, LIB=yyyyy)
%DATES (YEAR='01DEC2012'D, LIB=zzzzz)
%DATES (YEAR='01JAN2013'D, LIB=aaaaaa)
%DATES (YEAR='01FEB2013'D, LIB=bbbbbb)
%DATES (YEAR='01MAR2013'D, LIB=cccccc)
%DATES (YEAR='01APR2013'D, LIB=dddddd)
%DATES (YEAR='01MAY2013'D, LIB=eeeeee)
%DATES (YEAR='01JUN2013'D, LIB=ffffff)
%DATES (YEAR='01JUL2013'D, LIB=gggggg)
%DATES (YEAR='01AUG2013'D, LIB=hhhhhh)
%DATES (YEAR='01SEP2013'D, LIB=iiiiii)
%DATES (YEAR='01OCT2013'D, LIB=jjjjjj)
%DATES (YEAR='01NOV2013'D, LIB=kkkkkk)
%DATES (YEAR='01DEC2013'D, LIB=llllll)




data post.final; set post.TRYa
post.TRYb
post.TRYc
post.TRYd
post.TRYe
post.TRYf
post.TRYg
post.TRYh
post.TRYi
post.TRYj
post.TRYk
post.TRYl
post.TRYm
post.TRYn
post.TRYo
post.TRYp
post.TRYq
post.TRYr
post.TRYs
post.TRYt
post.TRYu
post.TRYv
post.TRYw
post.TRYx
post.TRYy
post.TRYz
post.TRYaa
post.TRYbb
post.TRYcc
post.TRYdd
post.TRYee
post.TRYff
post.TRYgg
post.TRYhh
post.TRYii
post.TRYjj
post.TRYkk
post.TRYll
post.TRYmm
post.TRYnn
post.TRYoo
post.TRYpp
post.TRYqq
post.TRYrr
post.TRYss
post.TRYtt
post.TRYuu
post.TRYvv
post.TRYww
post.TRYxx
post.TRYyy
post.TRYzz
post.TRYaa
post.TRYbb
post.TRYcc
post.TRYdd
post.TRYee
post.TRYff
post.TRYgg
post.TRYhh
post.TRYii
post.TRYjj
post.TRYkk
post.TRYll
post.TRYmm
post.TRYnn
post.TRYoo
post.TRYpp
post.TRYqq
post.TRYrr
post.TRYss
post.TRYtt
post.TRYuu
post.TRYvv
post.TRYww
post.TRYxx
post.TRYyy
post.TRYzz
post.TRYaaa
post.TRYbbb
post.TRYccc
post.TRYddd
post.TRYeee
post.TRYfff
post.TRYggg
post.TRYhhh
post.TRYiii
post.TRYjjj
post.TRYkkk
post.TRYlll
post.TRYmmm
post.TRYnnn
post.TRYooo
post.TRYppp
post.TRYqqq
post.TRYrrr
post.TRYsss
post.TRYttt
post.TRYuuu
post.TRYvvv
post.TRYwww
post.TRYxxx
post.TRYyyy
post.TRYzzz
post.TRYaaaa
post.TRYbbbb
post.TRYcccc
post.TRYdddd
post.TRYeeee
post.TRYffff
post.TRYgggg
post.TRYhhhh
post.TRYiiii
post.TRYjjjj
post.TRYkkkk
post.TRYllll
post.TRYmmmm
post.TRYnnnn
post.TRYoooo
post.TRYpppp
post.TRYqqqq
post.TRYrrrr
post.TRYssss
post.TRYtttt
post.TRYuuuu
post.TRYvvvv
post.TRYwwww
post.TRYxxxx
post.TRYyyyy
post.TRYzzzz
post.TRYaaaaa
post.TRYbbbbb
post.TRYccccc
post.TRYddddd
post.TRYeeeee
post.TRYfffff
post.TRYggggg
post.TRYhhhhh
post.TRYiiiii
post.TRYjjjjj
post.TRYkkkkk
post.TRYlllll
post.TRYmmmmm
post.TRYnnnnn
post.TRYooooo
post.TRYppppp
post.TRYqqqqq
post.TRYrrrrr
post.TRYsssss
post.TRYttttt
post.TRYuuuuu
post.TRYvvvvv
post.TRYwwwww
post.TRYxxxxx
post.TRYyyyyy
post.TRYzzzzz
post.TRYaaaaaa
post.TRYbbbbbb
post.TRYcccccc
post.TRYdddddd
post.TRYeeeeee
post.TRYffffff
post.TRYgggggg
post.TRYhhhhhh
post.TRYiiiiii
post.TRYjjjjjj
post.TRYkkkkkk
post.TRYllllll
;run;
于 2013-03-21T22:42:11.987 回答