Comparing 2 varchar fields

Question

I have a procedure which accepts a varchar field as input and compares it with each value in a table. how do I code it.
e.g. proc1(xx IN varchar, yy OUT)
--say column name is abc then
where abc = xx;
Dosent giving any output.

Answer 1

here it goes
SQL> ED
Wrote file afiedt.buf
1 CREATE OR REPLACE PROCEDURE
2 COMPARE_VARCHAR_FIELDS(XX IN VARCHAR,YY OUT VARCHAR)
3 IS
4 A NUMBER:=0;
5 BEGIN
6 FOR I IN (SELECT * FROM AX WHERE X=XX)
7 LOOP
8 A:=A+1;
9 END LOOP;
10 IF A>0 THEN
11 YY:=XX||' FOUND '||A||' TIMES';
12 ELSE
13 YY:=XX||' NOT FOUND';
14 END IF;
15* END;
SQL> /
PL/SQL procedure successfully completed.
SQL> ed
Wrote file afiedt.buf
1 DECLARE
2 Z VARCHAR2(40);
3 BEGIN
4 COMPARE_VARCHAR_FIELDS('x',z);
5 dbms_output.put_line(z);
6* end ;
SQL> /
PL/SQL procedure successfully completed.
SQL> set serveroutput on
SQL> /
x FOUND 3 TIMES
PL/SQL procedure successfully completed.