Select into a variable with case statement in a for loop - sql

Question

The foo variable should be filled with a select case within a for loop and then put out. I used a goto end_loop reference inside an exception, so the loop can continue.
Before I put the exception, I had an ORA-01403 error. Now I have an ORA-01422 error. The other selects without the case statement worked fine.
declare
foo varchar2(2000);
BEGIN
FOR rec IN (SELECT something FROM somewhere)
LOOP
BEGIN
Select case when attribute = 'something' then '1' end into foo from somewhere where some_condition;
DBMS_OUTPUT.put_line( 'Something' || foo);
EXCEPTION
WHEN NO_DATA_FOUND THEN
foo := NULL;
goto end_loop;
END;
<<end_loop>>
null;
END LOOP;
END;
Edit
More detailed
declare
opdatum varchar2(2000);
opdiagnose varchar2(2000);
d_op varchar2(2000);
some_variable varchar2(2000);
BEGIN
FOR rec IN (SELECT p.name, p.vorname, p.geburtsdatum, a.kis_id, kg.kg_id FROM kg_eintraege kg
INNER JOIN aufenthalte a
ON kg.patient_nr = a.patient_nr
and kg.fall_nr = a.fall_nr
INNER JOIN personen p
ON a.patient_nr = p.pat_nr
WHERE kg.kgtitel_nr = xxxxxxa
and a.kis_id = xxxxxxb)
LOOP
BEGIN
Select kurztext into opdatum from kg_eintraege where kontext = rec.kg_id and kgtitel_nr = xxxxxxc;
Select text into opdiagnose from kg_eintraege where kontext = rec.kg_id and kgtitel_nr = xxxxxxd;
Select text into d_op from kg_eintraege where kontext = rec.kg_id and kgtitel_nr = xxxxxxe;
Select case when kurztext = 'Something' then '1' end into some_variable from kg_eintraege where kontext = rec.kg_id and kgtitel_nr = xxxxxxf;
DBMS_OUTPUT.put_line(rec.name || ' ' || rec.vorname || ' ' || TO_CHAR(rec.geburtsdatum, 'DD.MM.YYYY')
|| ' ' || rec.kis_id || ' ' || opdatum|| ' ' || opdiagnose ||
' ' || d_op || ' ' || some_variable
);
EXCEPTION
WHEN NO_DATA_FOUND THEN
some_variable := NULL;
goto end_loop;
END;
<<end_loop>>
null;
END LOOP;
END;
Update
The case statement seems to be alright. The problem is that some rows in the select are null.
Update2
No exception needed.
Solution:
select nvl((select case when kurztext = 'Something' then '1' end from kg_eintraege where kontext = rec.kg_id and kgtitel_nr = xxxxxxf and kurztext = 'Something'), 'NOT_FOUND') into some_variable from dual
Thanks to NikNik for the help.

Answer 1

You problem is not the CASE but your WHERE condition witch is retourning more than 1 record or 0 record found.
For more details look here.
In the second case you can do this:
select nvl( (your_case), 'NOT_FOUND' ) into foo from dual;