BEFORE SORT:
   col1    col2 col3 col4     col 5
1040564312  z   89   In    258381720
1040564312  z   89   Out   4194077715
1040564322  z   90   Out   4194081727
1040564322  z   90   In    258385268
1040564335  z   94   IN    4194085256
1040564335  z   94   Out   4194085196


DESIRED SORT: (col4)
 col1    col2 col3 col4     col 5
1040564312  z   89   In    258381720
1040564312  z   89   Out   4194077715
1040564322  z   90   In    258385268
1040564322  z   90   Out   4194081727
1040564335  z   94   IN    4194085256
1040564335  z   94   Out   4194085196