Procedure To Generate Crosstable From Data Inside Calves_per_breed Table

I have two Tables, the one table is called (calves_per_breed) and contains all my query results. I then have another table (calves_per_breed_crosstable) which is used to place the generated count values in calves_per_breed to create a crosstable from the count data into calves_per_breed_crosstable.

I'm using the following procedure to generate the crosstable from the data inside the calves_per_breed table:

PROCEDURE pcalves_per_breed_genCrossTable
IS
BEGIN
---------------------------------------------------------------------------
--SEX CODES
update calves_per_breed_crosstable
set (m, f) = (select count(decode(geslag, 'M', 1, null)),
count(decode(geslag, 'F', 1, null))
from calves_per_breed)
[codee]....

Now this procedure works 100%, the only problem is it generates the ENTIRE table. if you know how a crosstable works, thetop right section of the table is exactly the same as the bottom left section of the table. I wish to optimize my code so that it only generates the values for the needed columns, and not ALL the columns, as values are generated twise now, which increases the query time! Here is a tipical output of the kalwers_per_ras_crosstable:

Note: You will notice that i used a Column called TID with string values to indicate the vertical columns for the crosstable. The Vertical Columns are the same as the top Columns(which are actual columns, and not row values as the vertical columns)

select *from kalwers_per_ras_crosstable:

TID M F NFR A B C SP RED BLACK SC1 SC2 SC3
----- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------
M 138 0 0 0 0 0 138 122 16 74 64 0
F 0 173 0 0 0 0 173 161 12 92 81 0
NFR 0 0 0 0 0 0 0 0 0 0 0 0
A 0 0 0 0 0 0 0 0 0 0 0 0
[code]....