Question

I have a query like

SELECT
    some_field,
    SUM(float_field)
FROM
    some_table
GROUP BY
    some_field
HAVING
    SUM(float_field) <> 0

Is it safe to use such way of comparison in Oracle or it is better to use something like

ABS(SUM(float_field)) < PrecisionConstant

Just for case, float_field is not nullable field of FLOAT type

Answer 1

Well, the expression HAVING SUM(float_field) <> 0 will not restrict records where the SUM would be like 0.1 or -0.2.

Use the following expression if you want to achieve that:

HAVING TRUNC(SUM(float_field)) <> 0