compare information from two spreadsheets or excel sheets

[EJA]

Don't know if any one can help, I am trying to find an easy way to compare
data from one spread sheet to another on Excel 2000. Every week I create a
spreadsheet and need to find out if any further items added on it.

example old spreadsheet would be called Andrews 19.04.2010 with 3 sheets 4
columns on each. The new one would be Andrews 26.04.2010 same set up again
but possibley new items on the Andrews 26.04.2010

 

[Faraz Ahmed Qureshi]

Add a fifth corresponding column on the NEW sheet and insert the following
formula in the first cell
=SUMPRODUCT((OldSheet!A:A=A1)*(OldSheet!B:B=B1)*(OldSheet!C:C=C1)*(OldSheet!D=D1))

Copy it down.

This will give u the no. of times the an identical entry is occurring in the
OldSheet. The cells with result 0 will be the ones that are new.