How do I split a big data table into smaller ones? (un-merge or opposite of concatenate)

[#1]

Hi,

Is there a script or a function which would essentially do the opposite of the "Concatenate" function? I have a massive data file with a source column which is the primary key & other columns associated with each primary key. I am trying to split this massive data table into several smaller tables based on the primary key. 

Any suggestions?

Thanks

[#2 · Accepted solution]

The easiest way to do this is to use the Subset with the "Subset By" selection

     Talbles==>Subset

[#3]

I tried it and it worked perfectly. Thanks a bunch!

I must confess I am bit embarrassed that for as long as I have been using JMP (especially the "Subset" function) I did not even notice the "By" checkbox. 

[#4]

I remember using JMP 3, and with the breadth and depth of JMP, I learn new JMP functionality all the time.