Hi all,
I have a document that has 12 tabs,named after the months of the year.
Could anybody tell me how to create the following equations:
* COUNTIF column A in January tab +column A in February tab +column A in
March tab +column A in May tab +column A in June tab +column A in July tab
+column A in August tab +column A in September tab +column A in October tab
+column A in November tab +column A in December tab = "Peter"

I assume you *accidently* left out APRIL.

Anyway ... you'll have to make a datalist of your tab names.
Make sure that the spelling is *exactly* as they appear in the tabs.
Say you create this list in Z1 to Z12.

Then try this:

=SUMPRODUCT(COUNTIF(INDIRECT("'"&Z1:Z12&"'!A:A")," Peter"))

Watch those apostrophes and double quotes!
They're included just in case there might be spaces in the sheet names.

--
HTH,

RD

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"Pietro" wrote in message
...
Hi all,
I have a document that has 12 tabs,named after the months of the year.
Could anybody tell me how to create the following equations:
* COUNTIF column A in January tab +column A in February tab +column A in
March tab +column A in May tab +column A in June tab +column A in July tab
+column A in August tab +column A in September tab +column A in October
tab
+column A in November tab +column A in December tab = "Peter"

=SUMPRODUCT(COUNTIF(INDIRECT("'"&TEXT(ROW(INDIRECT ("1:12"))*30,"mmmm")&"'!A:A"),"Peter"))

TEXT(ROW(INDIRECT("1:12"))*30,"mmmm")

will generate the sheet names:

January
February
March
...
December

Biff

"Ragdyer" wrote in message
...
I assume you *accidently* left out APRIL.

Anyway ... you'll have to make a datalist of your tab names.
Make sure that the spelling is *exactly* as they appear in the tabs.
Say you create this list in Z1 to Z12.

Then try this:

=SUMPRODUCT(COUNTIF(INDIRECT("'"&Z1:Z12&"'!A:A")," Peter"))

Watch those apostrophes and double quotes!
They're included just in case there might be spaces in the sheet names.

--
HTH,

RD

---------------------------------------------------------------------------
Please keep all correspondence within the NewsGroup, so all may benefit !
---------------------------------------------------------------------------

"Pietro" wrote in message
...
Hi all,
I have a document that has 12 tabs,named after the months of the year.
Could anybody tell me how to create the following equations:
* COUNTIF column A in January tab +column A in February tab +column A in
March tab +column A in May tab +column A in June tab +column A in July
tab
+column A in August tab +column A in September tab +column A in October
tab
+column A in November tab +column A in December tab = "Peter"