Number of a specific day within a specific period

Question

Hi all,
I want to form a query something like - "select count(saturdays) between '01/01/2007' and '31/12/2007' "
And the output should be like this -
Count
53
not sure, if 53 is correct or not.
And one more query which returns like this -
Saturday falls on
06/01/2007
13/01/2007
20/01/2007
27/01/2007
03/02/2007
10/02/2007
17/02/2007
29/12/2007
Is this possible without having data in any other table. I mean, can we frame a query just from dual and get these results.
Your assistance please...

Answer 1

Are you looking for something like this?
SQL> WITH t
  2  AS
  3  (
  4  SELECT TO_DATE('01/01/2007','DD/MM/YYYY') start_dt, TO_DATE('31/12/2007','DD/MM/YYYY') end_dt FROM DUAL
  5  )
  6  SELECT SUM(DECODE(TRIM(TO_CHAR(dt,'DY')),'SAT',1,0))
  7  FROM
  8  (   SELECT start_dt+LEVEL-1 dt
  9      FROM t
10      CONNECT BY LEVEL < (end_dt-start_dt)+2
11  )
12  /
SUM(DECODE(TRIM(TO_CHAR(DT,'DY')),'SAT',1,0))
                                           52