Out put problum

Question

First Query
select prod_id,sum(total_qty) from
(SELECT prod_id,total_qty
FROM sale_order_detail
order by total_qty desc)
where prod_id like 'CA%' and rownum<11 and total_qty is not null
group by prod_id
order by sum(total_qty) desc
Result
PROD_ID              SUM(TOTAL_QTY)
CA30151                          60
CA40474                          54
CA30164                          50
CA40509                          50
CA40436                          50
CA40421                          50
CA30174                          50
CA20031                          50
Second Query
SELECT prod_id,sum(total_qty)
FROM sale_order_detail where total_qty is not null and prod_id like'CA%'
group by prod_id
order by sum(total_qty) desc
PROD_ID              SUM(TOTAL_QTY)
CA40133                         175
CA30059                         135
CA40474                         132
CA40128                         127
CA50133                         123
CA60024                         107
CA40402                          95
CA60017                          91
CA30164                          87
CA30100                          86
CA40510                          83In First Query My result is diffrent then second but i think both the query give me same result for top ten
total_qty please rectify me
Thanks And Regards
Vikas Singhal

Answer 1

Hi,
No, the rownum is taking precedence in this query, try with this one:
with q1 as
(select 'a' c1,1 c2 from dual
union all
select 'a',2 from dual
union all
select 'a',3 from dual
union all
select 'a',4 from dual
union all
select 'b',5 from dual
union all
select 'b',6 from dual)
select c1,sum(c2) from q1
group by c1
with q1 as
(select 'a' c1,1 c2 from dual
union all
select 'a',2 from dual
union all
select 'a',3 from dual
union all
select 'a',4 from dual
union all
select 'b',5 from dual
union all
select 'b',6 from dual)
select c1,sum(c2) from
(select c1,c2 from q1)
where rownum<=5
group by c1Could you post the explain plan of your query (The 1st one)?
You've probably a 'count stop key' step before the aggregate ...