Hi,

I have a large dataset that looks similar to this:

1113531405.073 15577 91 21 12001 0.489 0.092 Complete 2895 80
1114032172.486 15577 469 15 7860 0.695 0.089 Complete 2895 80

I would like to sort the data by column 3 followed by sorting by column 
1.  I know using the sort command I can differentiate between which 
column I want to sort by, but I don't know how to sort by one column 
then by another.  Any suggestions?  Also, are there any other sorting 
programs that use an algorithm other than the one provided by the sort 
program?  My data size is 700 MB so I fear it may take awhile and would 
like to use a very efficient algorithm :-)

Thanks,

~Mark Oden