sorting table

Hi friends,

please help me in sorting this table. the table should be sorted based
on LASTNAME, and then the ID (only non-zero id should be sorted).


ID LASTNAME
--------+----------------------------
2 FFF
1 XXX
0 CCC
1 DDD
2 BBB
0 EEE
0 GGG
3 III
3 HHH
4 ZZZ
4 ZZZ




The expected table is as follows
ID LASTNAME
--------+----------------------------
2 BBB
2 FFF
0 CCC
1 DDD
1 XXX
0 EEE
0 GGG
3 HHH
3 III
4 XYZ
4 ZZZ

should be sorted based on last name and should be grouped with the
same ID, except for the ID as 0

Thanks in Advance..
Arun