Re: Find Number Of Sundays Between Two Dates - Mailing list pgsql-general

On 3/5/08, A. Kretschmer <andreas.kretschmer@schollglas.com> wrote:
>  With generate_series() i generate a list of dates, and later i check if
>  the date are a saturday. Okay, you need to know sunday -> change from 6
>  to 0 and ou course, you can calculate the parameter for the
>  generate_series like

I find it convenient to create a custom version of generate_series:

CREATE OR REPLACE FUNCTION generate_series(date,date)
  RETURNS SETOF date AS $$
    SELECT $1 + n FROM generate_series(0,$2-$1) AS x(n)
  $$ LANGUAGE SQL IMMUTABLE;

  Regards,
    Dawid