CASE statement.........

[nkumarin001]

Hi,
Can anyone please help me to rectify the problem.

Hi i wrote the following code regarding CASE statement:-

declare
num number :=45;
begin
case num
when num<20 then
dbms_output.put_line('Num is less then 20');
when num<40 then
dbms_output.put_line('Num is less then 40');
else
dbms_output.put_line('Num is less then 60');
end case;
end;
/

but i got the following error:-

case num
*
ERROR at line 4:
ORA-06550: line 4, column 6:
PLS-00615: type mismatch found at 'NUM' between CASE operand and WHEN operands
ORA-06550: line 4, column 1:
PL/SQL: Statement ignored

********** In this error i think datatype mismatch occured but i dont no why it occured **********

Please help with the correct code.

Regards,
Naveen

[debasisdas]

Use the following code

declare
num number :=45;
begin
case
when num < 20 then
dbms_output.put_line('Num is less then 20');
when num < 40 then
dbms_output.put_line('Num is less then 40');
else
dbms_output.put_line('Num is less then 60');
end case;
end;

[Kavitha Kusum]

What i think is that
the num which u used after case is of number data type and the num which u used in the when is returning you true or false, so there is a mismatch between the datatypes.

[debasisdas]

What i think is that
the num which u used after case is of number data type and the num which u used in the when is returning you true or false, so there is a mismatch between the datatypes.

There is nothing like mismatch.
Just compare the two sample code , you will get the difference.

[holdingbe]

Hi,
Can anyone please help me to rectify the problem.

Hi i wrote the following code regarding CASE statement:-

declare
num number :=45;
begin
case num
when num<20 then
dbms_output.put_line('Num is less then 20');
when num<40 then
dbms_output.put_line('Num is less then 40');
else
dbms_output.put_line('Num is less then 60');
end case;
end;
/

but i got the following error:-

case num
*
ERROR at line 4:
ORA-06550: line 4, column 6:
PLS-00615: type mismatch found at 'NUM' between CASE operand and WHEN operands
ORA-06550: line 4, column 1:
PL/SQL: Statement ignored

********** In this error i think datatype mismatch occured but i dont no why it occured **********

Please help with the correct code.

Regards,
Naveen

Hi naveen,
I looked your query.when you use reletional opertor please don't use num infront of case statement.

Your Query:

declare
num number :=45;
begin
case num
when num<20 then
dbms_output.put_line('Num is less then 20');
when num<40 then
dbms_output.put_line('Num is less then 40');
else
dbms_output.put_line('Num is less then 60');
end case;
end;
your mistake is highlighted in the form of bold

Correct Query:
declare
num number :=45;
begin
case
when num<20 then
dbms_output.put_line('Num is less then 20');
when num<40 then
dbms_output.put_line('Num is less then 40');
else
dbms_output.put_line('Num is less then 60');
end case;
end;

Please check and tell me..


Regards
Michael

[nkumarin001]

Hi naveen,
I looked your query.when you use reletional opertor please don't use num infront of case statement.

Your Query:

declare
num number :=45;
begin
case num
when num<20 then
dbms_output.put_line('Num is less then 20');
when num<40 then
dbms_output.put_line('Num is less then 40');
else
dbms_output.put_line('Num is less then 60');
end case;
end;
your mistake is highlighted in the form of bold

Correct Query:
declare
num number :=45;
begin
case
when num<20 then
dbms_output.put_line('Num is less then 20');
when num<40 then
dbms_output.put_line('Num is less then 40');
else
dbms_output.put_line('Num is less then 60');
end case;
end;

Please check and tell me..


Regards
Michael

Hi Michael

Thanks a lot michael its working properly.

Regards
Naveen

[nkumarin001]

Use the following code

declare
num number :=45;
begin
case
when num < 20 then
dbms_output.put_line('Num is less then 20');
when num < 40 then
dbms_output.put_line('Num is less then 40');
else
dbms_output.put_line('Num is less then 60');
end case;
end;

Hi debasisdas
Thanks a lot its working fine. But i am confused why i got that error.
Regards,
Naveen

[debasisdas]

because you specified the case expression twice.