# Oracle Conditional sum

## All we need is an easy explanation of the problem, so here it is.

This question was born in my mind looking at this kind of code:

``````select sum(value)
into positive
from my_table
where value > 0;

select sum(value)
into negative
from my_table
where value < 0;
``````

This works well for take the totals of this table.

But, my question is how I can get the sub-totals of `my_table` using only a statement.

### expected result:

Having this data on `my_table`

``````VALUE
-----
1.0
-2.0
3.0
-4.0
5.0
-6.7
8.9
``````

I’d a DML statement who can give me this output

``````positive | negative
---------+---------
17.9 |    -12.7
``````

Is this kind of operation possible?
If yes, how can i get it?

## How to solve :

I know you bored from this bug, So we are here to help you! Take a deep breath and look at the explanation of your problem. We have many solutions to this problem, But we recommend you to use the first method because it is tested & true method that will 100% work for you.

### Method 1

``````SQL> r
1  with t as (
2      select  1.0 as x from dual
3      union all select -2.0 as x from dual
4      union all select  3.0 as x from dual
5      union all select -4.0 as x from dual
6      union all select  5.0 as x from dual
7      union all select -6.7 as x from dual
8      union all select  8.9 as x from dual)
9  select sum(case when x > 0 then x else 0 end) as sum_of_positives,
10         sum(case when x < 0 then x else 0 end) as sum_of_negatives
11*   from t

SUM_OF_POSITIVES SUM_OF_NEGATIVES
---------------- ----------------
17,9            -12,7
``````

Note: Use and implement method 1 because this method fully tested our system.
Thank you 🙂