How To Confirm Order Of Data In Results Of Two Sql Queries

I want to confirm the order of the data in results of two sql queries.

For example, in my table 5 columns are there.c1 to c5.

c1 c2 c3 c4 c5
--------------------------------------------------
test100 1 A 1-Jan-2006 2-Jan-2006
test100 2 B 3-jan-2006 4-Jan-2006
test101 1 A 01-Jan-2006 2-Jan-2006
test101 2 B 03-Jan-2006 4-Jan-2006
test101 3 c 05-Jan-2006 06-Jan-2006

In this table if you order by c2,

select c3
from tab1
where c1='test101'
order by c2;

c3
---------
A
B
C

If you order by c4,

select c1,c2,c3
from tab1
where c1='test101'
order by c4;

c3
------
A
B
C

Sometimes order of these data may change like. the result of the 2nd query may change (bcos of c4 date column changes)

C3
--
A
C
B

So,@ run time i want to check the order of these 2 results should match....if not,i need to display the corresponding c1 column.