Substring, comparasion operatins usng PL/SQL

Question

i just need to know how to operate substring functions using PL/SQL. For instance, assume that i have strings such as 1000YTL, 200YTL, 3000YTL. What i need to cut the letters(YTL) ang get the numeric values and select mix and max of the numeric values. Here is my procedure
create or replace procedure Ihale_GettheMaxOrMin(v_ihlkodu in ihale_katilimcilar.ihlkodu%TYPE, outminval out number)
is
cursor cur is
select statement;
begin
OPEN cur;
LOOP
FETCH cur INTO maybe_an_array;
EXIT WHEN cur%NOTFOUND;
//substring and comparasion operations to get the mix or max and assign it to the out parameter...
END LOOP;
CLOSE cur;
end Ihale_GettheMaxOrMin;

Answer 1

like this ?
SQL> select replace('1000YTL', 'YTL') from dual;
REPL
1000
Hi there,
That will only work if you know that there are always going to be 3 chars and you know what the characters are. You would be safer to use the TRANSLATE function to remove all possible characters you do not need e.g.
SQL> SELECT '>>'||TRANSLATE( UPPER ('1000YTL'), 'ABCDEFGHIJKLMNOPQRSTUVWXYZ',' ')||'<<'
2 from dual
3 ;
'>>'||TR
1000<<SQL>
I've added the >> and << to show that you get just the number and nothing else.
This will remove all the letters of the alphabet so you don't care what those letters are. If there may be other characters in the string then simply add them to the list of those to translate to ''
Mark