hi all
i am trying to write query that discount the number of friday days between two days How ?

example
from_date = 21/10/2009
to_date = 2/11/2009

the result should be
(to_date - from_date ) - number of friday days between two days



thanks in advanced

السلام عليكم
you can try with this function

create or replace function fri_bet (date1 date,date2 date ) return number as day_bet number;
day number;
fri_count number :=0;
begin select date2-date1 into day_bet from dual;
for i in 1.. day_bet+1 loop
select to_char(date1-1+i,'d') into day from dual;
if day=7 then
fri_count:=fri_count+1;
end if;
end loop;
return(fri_count);
end;

the query

select fri_bet(to_date('30/10/09','dd/mm/yy'),to_date('06/11/09','dd/mm/yy')) from dual;

good luck

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