Give the query for this requirement can we get it in correlated sub query

Question

i have to query avg(someinfo) group by dayofthemonth for last three days
select someinfo from
(select avg(someinfo)from table tab
group by dayofdate1
where exists(select * from table
having max(date1)-tab.date1<3 )
how can we group day of the date1
someinfo date1
10 28-jun-2006
20 28-jun-2006
30 29-jun-2006
30 29-jun-2006
10 30-jun-2006
20 30-jun-2006
30 1-july-2006
40 1-july-2006
30 2-july-2006
40 2-july-2006
i have to query avg(someinfo) group by day for last three days
avg(someinfo) date1
35 2-jun-2006
35 1-july-2006
15 30-june-2006
here no need of union
Message was edited by:
user517983
Message was edited by:
user517983
Message was edited by:
user517983
Message was edited by:
user517983

Answer 1

SQL> CREATE TABLE t_table
  2  AS
  3 (SELECT 10 day ,'28-jun-2006' ft FROM dual
  4  UNION
  5  SELECT 20,'28-jun-2006' FROM dual
  6  UNION
  7  SELECT 30,'29-jun-2006' FROM dual
  8  UNION
  9  SELECT 30,'29-jun-2006' FROM dual
10  UNION
11  SELECT 10,'30-jun-2006' FROM dual
12  UNION
13  SELECT 20,'30-jun-2006' FROM dual
14  UNION
15  SELECT 30,'1-jul-2006' FROM dual
16  UNION
17  SELECT 40,'1-jul-2006' FROM dual
18  UNION
19  SELECT 30,'2-jul-2006' FROM dual
20  UNION
21  SELECT 40,'2-jul-2006' FROM dual)
22  .
SQL> /
Table created.
SQL> DESC t_table
Name                                                  Null?    Type
DAY                                                            NUMBER
FT                                                             VARCHAR2(11)
SQL> SELECT * FROM t_table;
       DAY FT
        10 28-jun-2006
        10 30-jun-2006
        20 28-jun-2006
        20 30-jun-2006
        30 1-jul-2006
        30 2-jul-2006
        30 29-jun-2006
        40 1-jul-2006
        40 2-jul-2006
9 rows selected.
SQL> SELECT day,ft FROM (SELECT AVG(day) day,ft FROM t_table GROUP BY ft ORDER BY ft DESC)
  2  WHERE ROWNUM<=3;
       DAY FT
        15 30-jun-2006
        30 29-jun-2006
        15 28-jun-2006Khurram