A better way to differentiate positive vs. negative numbers and sum them ?

Question

Hi, I wonder if there is a better or easier way to differentiate the positive numbers from negative ones and sum them respectively?
I come up with below:
create table t1 (num number, id varchar2(3));
insert into t1 values  (-100, 1);
insert into t1 values (50, 2);
insert into t1 values  (-10, 3);
insert into t1 values  (-20, 4);
insert into t1 values  (50, 5);
insert into t1 values  (60, 6);
select sum(decode(sign(num), 1, num, 0)) plus, sum(decode (sign(num), -1, num, 0)) minu from t1;
PLUS   MINU
160     -130Any suggestion would be appreciated! Thanks

Answer 1

if there is a better or easier way to differentiate the positive numbers from negative ones and sum them respectively?Maybe you want them in different rows than in different columns:
SQL> select sign(num), sum(num) from t1 group by sign(num)
SIGN(NUM)   SUM(NUM)
         1        160
        -1       -130
2 rows selected.?