Hi Folks, I need some suggestions

Following are the orginal variables:

DOB and Body wt measured on 6 different dates. I need following information for further processing and analysis:

Age of individuals (In days) at those six different dates when the body wt was measured, Average body wt. at 100 days and 200 days. Now, I need to know what is the most efficient and derivative method? I use SAS and excel (not a pro though) and believe would know what you are talking, if in those platforms. 

I know, I have been abusing this resource for quite some time but I prefer Sajha than anyother online discussion forum or study groups. On top of that, I know personally a lot of people here in sajha do loads of data mining everday. :()

Thanks Guys!

If It is SQL related question go to the sqlservercentral.com forum and post your question. You will get quick reply.

 You need to make your question clear. If you have the table paste it. And write the question clearly.