count # of unioned values

Suppose I have a table with 2 VARCHAR2(1)columns C1 and C2 and the following 3 rows:
A B
A C
B A

For each value in columns C1 and/or C2, I need to report the count of that value in each column such as:

Value #C1s #C2s
----- ----- -----

A         2     1
B         1     1
C         0     1


----- ----- -----

Total     3     3

I have written a PL/SQL procedure to do this. With Oracle 9.2 what is the best method to do this with a single SQL query? Received on Wed Feb 04 2004 - 15:57:27 CST