Sum of columns in union query

Question

hi, i am using oracle 10g database..
how to get the sum of column in union query ?
     select * from (select 100 records from dual), (select 50 available from dual)
union
select * from (select 200 records from dual), (select 150 available from dual)
display should be like
                 records         available
                  100               50
                  200               150
total            300               200thanks ...

Answer 1

Peter vd Zwan wrote:
try this:Grouping by records will not produce correct results:
SQL> with a as
  2  (
  3  select * from (select 100 records from dual), (select 50 available from dual)
  4  union
  5  select * from (select 100 records from dual), (select 100 available from dual)
  6  union
  7  select * from (select 200 records from dual), (select 150 available from dual)
  8  )
  9  select
10    case when grouping(records) = 0 then null else 'total' end tot
11    ,sum(records)   records
12    ,sum(available) available
13  from
14    a
15  group by
16  rollup (records)
17  ;
TOT      RECORDS  AVAILABLE
             200        150
             200        150
total        400        300
SQL> select  case grouping(rownum)
  2     when 1 then 'Total'
  3   end display,
  4          sum(records) records,
  5          sum(available) available
  6    from  (
  7            select * from (select 100 records from dual), (select 50 available from dual)
  8           union
  9            select * from (select 100 records from dual), (select 100 available from dual)
10           union
11            select * from (select 200 records from dual), (select 150 available from dual)
12          )
13    group by rollup(rownum)
14  /
DISPL    RECORDS  AVAILABLE
             100         50
             100        100
             200        150
Total        400        300
SQL> SY.