Analtic function first window size

Question

Hi
if i use the analtic functin max as
select max(sal) keep (dense_rank last order by empno) from emp;
what will the the window size in this case. what i mean is i dont specify the sliding window in this case what will be the default.
regards
Nick

Answer 1

Since neither PARTITION BY nor GROUP BY clause is
specified, the window size in this case will be
the entire set of data in the emp table.
HTH
isotopeActually, I think the default is unbounded preceeding and current row.
SQL> with t as (select rownum rn from dual connect by level <= 10)
  2  select rn, sum(rn) over (order by rn
  3    range between unbounded preceding and current row) cum_total
  4  from t;
        RN  CUM_TOTAL
         1          1
         2          3
         3          6
         4         10
         5         15
         6         21
         7         28
         8         36
         9         45
        10         55
10 rows selected.
SQL> with t as (select rownum rn from dual connect by level <= 10)
  2  select rn, sum(rn) over (order by rn) cum_total
  3  from t;
        RN  CUM_TOTAL
         1          1
         2          3
         3          6
         4         10
         5         15
         6         21
         7         28
         8         36
         9         45
        10         55
10 rows selected.