How to count occurrences on dates

Question

I have a table which which measures the occurrences of various events, and I'm trying to figure out a way to calculate the occurrences on each day.
Table 1 - Occurrences
3/4/08 4:40 PM
3/4/08 9:45 PM
3/5/08 2:50 AM
3/5/08 5:45 AM
3/5/08 9:30 AM
3/5/08 12:30 PM
Table 2 - Occurrences per day
3/4/08 - 2
3/5/08 - 4
Is there a way to get Numbers to do a COUNTIF and recognize ONLY the date (and not the time) for Table 2?

Answer 1

Hello
Assuming that the original occurences are stored in column A, in column B put the formula
=DATE(YEAR(A),MONTH(A),DAY(A))
so you will have stripped date.
Now in Table 2 you may use:
=COUNTIF(Table 1 :: B,DATE(2008,3,4)) --> 2
=COUNTIF(Table 1 :: B,DATE(2008,3,5)) --> 4
Or, for an easier use
in Table 2
column A
3/1/2008
3/2/2008
3/3/2008
3/4/2008
3/5/2008
column B
=IF(COUNTIF(Tableau 1 :: B,A),COUNTIF(Tableau 1 :: B,A),"")
Yvan KOENIG (from FRANCE vendredi 2 mai 2008 09:08:54)