Hello, I am a beginner, and I've tried to find via the discussions the solution of my problem. Unfortunately I haven't...so hopefully you will be able to help me out with this : I have a table below; I need to count how many duplicates I have in the column ID NUMBER; and put the result in a new column COUNT. So then, I can calculate the real amount by doing as follow = Amount/Count. In Excel, the formula is COUNTIF Which tool can I use ? Thanks in advance for your input, CDON