How to return 0 on max function when no rows found

Hi everyone!
I am using a max fuction, but I want that the function return 0 if there are not rows that match with the conditions.
I was thinking in something like this
SELECT nvl(max(salary),0)
But it doesn't work, it doesn't show the value 0
Please someone can give and idea
Thanks a lot.

Hi,
Welcome to the forum!
NVL (salary, 0) returns either salary or 0 on each row. It does not change number of rows.
To make sure that rows exist, you can do an outer join, like this:
SELECT NVL ( MAX (t.salary)
            , 0
            )    AS max_salary
FROM             dual
LEFT OUTER JOIN table_x t ON 1 = 1
I hope this answers your question.
If not, post a little sample data (CREATE TABLE and INSERT statements, relevant columns only) for all the tables involved, and the results you want from that data.
Explain, using specific examples, how you get those results from that data.
Always say what version of Oracle you're using (e.g. 11.2.0.2.0).
See the forum FAQ {message:id=9360002}

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Query
and
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Regards,
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Message was edited by:
Rob van Wijk
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