James Holmes wrote:
>
> Just wrap a PL/SQL function around a to_char() call with the appropriate
> date mask. No, that's not an act of volunteering :-)
Actually the way I do it in postgres is this (note, these are the first
functions I've ever written in any database language)
CREATE OR REPLACE FUNCTION Month(timestamp) RETURNS double precision
AS 'select extract(month from $1)'
LANGUAGE SQL
IMMUTABLE
RETURNS NULL ON NULL INPUT;
CREATE OR REPLACE FUNCTION Year(timestamp) RETURNS double precision
AS 'select extract(year from $1)'
LANGUAGE SQL
IMMUTABLE
RETURNS NULL ON NULL INPUT;
Since oracle supports extract() as well, it should be similarly easy.
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