Max function for table having no rows

Hi All
I have a table in which initially no rows. I am running max() function for a column and then wnats to add 1.
But when no rows there below code in not working
select max(code) into p_maxCode from cms_codedetails where codetypeid=0;
p_maxCode:=p_maxCode+1;
dbms_output.PUT_LINE('p_maxCode: '||p_maxCode);
result is:
p_maxCode:
How can I handle the this to get 1 if no rows in the table .

Hi !
Max function in yur case returns NULL and then
null + <anything> ... is still null
You can do
p_maxCode:=nvl(p_maxCode,0)+1;
or
select nvl(max(code),0) into p_maxCode from cms_codedetails where codetypeid=0;
Of course if YOU have decide that null in this case can be treated as 0
T

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