Excel - 计算两个日期之间每个月的天数 [英] Excel - count days in each month between two dates

问题描述

我正在尝试编写一个 excel 公式，该公式可以拖过一行单元格，以给出两个指定日期之间每个月的天数.例如:

I am trying to write an excel formula which can be dragged across a row of cells to give the number of days in each month between two specified dates. E.g:

         A           B         C       D       E       F 

1  | START DATE | END DATE |  Jan  |  Feb  |  Mar  |  Apr  |...
   ---------------------------------------------------------
2  |  10/02/17  | 15/03/17 |   0   |  19   |  15   |   0   |...

一个额外的问题是，结束日期可能会留空，表示结束日期应视为今天.我可以在从 C2 开始的单元格中放置一个公式，但 A 列和B 必须留给用户输入.

An added complication is that the end date may be left blank indicating that the end date should be treated as today. I can put a formula in the cells starting from C2 but columns A & B must be left for user entry.

我使用大量嵌套 if 语句取得了一些进展，但如果结束日期为空，我很难处理它.

I made some progress using lots of nested if statements but am having real trouble getting it to handle if the end date is blank.

有人可以帮忙吗?

*编辑

我没有展示我写的公式，因为我担心它有点乱，但是按照要求，我现在在下面展示(这个公式来自 C2)

I refrained from showing the formula I had written so far as I'm afraid it's a bit messy but as it has been requested, I have now shown below (this formula from C2)

 =IF(AND($A2<C$1,$B2<D$1),DAY(A2),IF($A2>=D$1,0,IF(AND($A2<C$1,$B2=""),IF(TODAY()<C$1,0,IF(TODAY()>C$1,IF(TODAY()<D$1,DAY(TODAY()),D$1-C$1),IF(TODAY()<D$1,INT(TODAY()-$A2),$D1-$C1))),IF(AND($A2>=C$1,$B2=""),IF(TODAY()<D$1,INT(TODAY()-$A2+1),D$1-$A2),IF(AND($A2>=C$1,$B2<D$1),$B2-$A2+1,IF(AND($A2<C$1,$B2<C$1),0,IF(AND($A2>=C$1,$B2>=D$1),D$1-$A2,IF(AND($A2<C$1,$B2<D$1),DAY(B2),IF(AND($A2<C$1,$B2>=D$1),D$1-C$1,0)))))))))

推荐答案

无论如何这里是基于标准公式的完整性的替代方法

Anyway here is the alternative approach for completeness based on the standard formula

=max(0,min(end1,end2)-max(start1,start2)+1)

用于 2 个日期范围之间的重叠

for the overlap between 2 date ranges which gives

=MAX(0,MIN(IF($B2="",TODAY(),$B2),EOMONTH(DATEVALUE(C$1&"-17"),0))-MAX($A2,DATEVALUE(C$1&"-17"))+1)

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