使用 Oracle SQL 获得多列的总数

Question

I'm having a problem on how to get the total of columns Amount1 - Amount5 each line.

I tried the below query but the result is always 0.

Select ID, Amount1 + Amount2 + Amount3 + Amount4 as total_amount from table

ID	Amount1	Amount2	Amount3	Amount4
1	5	5	5	5
2	10	10	10	10
3	15	20	20	20

Hope you can help me on this.

Thanks,

Answer 1

Result can't be 0 for data you posted:

SQL> with test (id, amount1, amount2, amount3, amount4) as
  2    (select 1,  5,  5,  5,  5 from dual union all
  3     select 2, 10, 10, 10, 10 from dual union all
  4     select 3, 15, 20, 20, 20 from dual
  5    )
  6  select id,
  7         amount1 + amount2 + amount3 + amount4 as total_amount
  8  from test
  9  order by id;

        ID TOTAL_AMOUNT
---------- ------------
         1           20
         2           40
         3           75

SQL>

Therefore, either you did something wrong, or didn't post everything we should know to assist.

Maybe you use two connections to the same user; for one, you updated old values for all amount columns to what you posted, but the one that actually runs the select statement, they are still 0 because - in the first session - you didn't COMMIT .