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See Also: Array Formulas | Count with multiple criteria | Sum with multiple criteria | Conditional summing | Sum Every Nth Cell | Sum The x Largest or x Smallest Number in a Range | Count Only One Occurrence
Conditional Summing involving Dates
Toologre needed to establish a quantity in his spreadsheet for items that fall
between today's date and a date 30 days in the future.
XL-Dennis recommended using the
SUMPRODUCT- function:
Let column A consist of dates and column B of values:
In order to get the total amount in column B:
=SUMPRODUCT((A2:A36>=DATEVALUE(TEXT(NOW(),"DD-MM-YYYY")))*(A2:A36<=(DATEVALUE(TEXT(NOW()+30,"DD-MM-YYYY"))))*B2:B36)
In order to get the number of items in A-column that falls between the dates:
=SUMPRODUCT((A2:A36>=DATEVALUE(TEXT(NOW(),"DD-MM-YYYY")))*(A2:A36<=(DATEVALUE(TEXT(NOW()+30,"DD-MM-YYYY"))))*A2:A36)
Dave Hawley suggested using Excel’s Database Functions and provided a link to
some free examples
DFunctionsWithValidation.zip
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