About sum function

Question

I use 'select sum(xx) ..' to get a value,if the value>=10,000,000 and oracle round the value,
for example,
if the value is 10,000,000.58,oracle display 10,000,001,
if the value 9,999,999.01 oracle display 9,999,999.01
who can tell me why?thank you very much!

Answer 1

I've tried exactly what you suggested, and did not have any problems. I used 8.0.4 and 8.1.7
Step by Step:
create table test1 (field1 number(13,2));
insert into test1 values(24.59);
insert into test1 values(1000000);
set numwidth 15
column field1 format 999,999,999,999.99
select sum(field1) field1 from test1;
FIELD1
1,000,024.59
insert into test1 values(100000000);
select sum(field1) field1 from test1;
FIELD1
101,000,024.59
insert into test1 values(10000000000.50);
select sum(field1) field1 from test1;
FIELD1
10,101,000,025.09
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