Re: SQL Default Question (Resent)

abc wrote:
>
> Hi All,
>
> I have a PL/SQL to do following calculation:
>
> Total = NUM1 + NUM2;
>
> SELECT a INTO NUM1 FROM T1;
> SELECT b INTO NUM2 FROM T2;
>
> As b has no return row therefore NUM2 is undefined. Total as a result is
> also undefined (PL/SQL crashed with "No defined value ...")
>
> Is there any way to return b as ZERO if no row returned ???
>
> I have tried
>
> SELECT NVL(
> (SELECT b INTO NUM2 FROM T2), 0) FROM DUAL;
>
> But PL/SQL did not allow me to use SELECT ...(SELECT !
>
> SELECT NVL(NUM2,0) FROM DUAL doesn't work.

Total = NVL(NUM1, 0) + NVL(NUM2, 0);

-- 
AjA