Selecting top n elements of a group in Oracle

Question

I have an Oracle table which has a name,value,time columns.Basically the table is for logging purposes to store what are the changes made to a particular name,what was the p

Answer 1

I offer my quick fix. This query groups and counts in descending order (in the inner query). The Outer query simply allows you to define the number of rows to display (:pRows).

Select * from
(Select
     group_field,
     count(*) Cnt
From
     record_source(s)
Where
     Conditions
Order by
     Count(*) Desc) x
Where
  rownum < :pRows+1;