Can I use sum()
in coalesce()
?
I want to use it in a stored function in Postgres.
For example
case (COALESCE(t3.Count3,0)+ COALESCE(t2.Count2,0) >= t4.Count4::float)
then ( select (t4.Count4::float/((t3.Count3::float)+(t2.Count2::float))) * 100 as Count5 )
else ''0''
end as Count5
It's hard to tell what you're trying to do here because there are multiple issues in the code. Also though your title mentions SUM
your code doesn't include it (though you do have +
but that's not the same).
If this is part of a SELECT
statement, then I'm guessing what you want is:
SELECT
CASE
WHEN COALESCE(t3.Count3,0)+ COALESCE(t2.Count2,0) >= t4.Count4::float
THEN 100 * t4.Count4::float/(COALESCE(t3.Count3::float,0)+COALESCE(t2.Count2::float,0))
ELSE 0
END as Count5
FROM MyTable