Re: [SQL] week ending

[Rodrigo De Leon]

On 7/5/06, Keith Worthington <[EMAIL PROTECTED]> wrote:

Hi All,

I just finished writing a query that groups data based on the week number.

SELECT EXTRACT(week FROM col_a) AS week_number,
        sum(col_b) AS col_b_total
   FROM foo
  WHERE foobar
  GROUP BY EXTRACT(week FROM col_a)
  ORDER BY EXTRACT(week FROM col_a);

I would like to generate the starting date or ending date based on this
number.  IOW instead of telling the user "week number" which they won't
understand I would like to provide either Friday's date for "week
ending" or Monday's date for "week beginning".

SELECT <something> AS week_ending,
        sum(col_b) AS col_b_total
   FROM foo
  WHERE foobar
  GROUP BY EXTRACT(week FROM col_a)
  ORDER BY EXTRACT(week FROM col_a);

--

Kind Regards,
Keith

select
max(case when (to_char(col_a,'d') between 2 and 6) then col_a end) as
week_ending,
sum(col_b) as col_b_total from foo
where foobar
group by extract(year from col_a), extract(week from col_a)
order by extract(year from col_a), extract(week from col_a);

Regards,

Rodrigo

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