How to rewrite the query

Question

hi ,
Actual i write the query like this , and run this query in sql developer ,
it will take more than 15 mins
alloc_details table -- 2 lac records
doc_details -- 2 lac records
query :
SELECT
     a.activity
,      sum( a.lamt ) lamt
,      sum( a.lamt ) camt
FROM
     alloc_detail a
WHERE
     a.alc_code <>'JOB'
And      a.alc_value is not null
And      EXISTS ( SELECT
               distinct b.doc_no
     FROM
               doc_detail b
     WHERE
               a.org=b.org
     And      a.doc_no=b.doc_no
     And      a.doc_type=b.doc_type
     And      ( b.dr_act_code='11111' OR b.cr_act_code='111111')
     And      ( ( trunc( b.doc_date ) >='01-jan-08' ) )
     And      ( ( trunc( b.doc_date ) <= '31-jan-08' ) )
GROUP BY
     a.alc_value
Anyother way to rewrite the query .

Answer 1

Is this query working? a.activity seems to be a "not a group by expression"
select a.activity,sum(a.lamt) lamt,sum(a.lamt) camt  /* 2 times same sum - a typo ? */
  from alloc_detail a
where a.alc_code != 'JOB'      /* not equal presumed */
   and a.alc_value is not null
   and exists(select distinct b.doc_no
                from doc_detail b
               where a.org = b.org
                 and a.doc_no = b.doc_no
                 and a.doc_type = b.doc_type
                 and (b.dr_act_code = '11111' or b.cr_act_code = '111111')
                 and trunc(b.doc_date) >= '01-jan-08'
                 and trunc(b.doc_date) <= '31-jan-08'
group by a.alc_valuehow about applying predicates first
select a.alc_value,sum(a.lamt) lamt,sum(a.camt) camt
  from (select alc_value,lamt,camt,org,doc_no,doc_type
          from alloc_detail
         where alc_code != 'JOB'
           and alc_value is not null
       ) a,
       (select distinct org,doc_no,doc_type
          from doc_detail
         where doc_date >= to_date('01-jan-08','dd-mon-rr')
           and doc_date <= to_date('31-jan-08','dd-mon-rr') + 1 - 1/24/60/60
           and (dr_act_code = '11111' or cr_act_code = '111111')
       ) b
where a.org = b.org
   and a.doc_no = b.doc_no
   and a.doc_type = b.doc_type
group by a.alc_valueRegards
Etbin