Building Query to count # of [day] for last yr

Question

This will be used in Reports 6.0
I have created a query that should count the number of (example : Tuesdays) for the prior year. I can't figure how to do it....
Here's my query that returns only 1:
select count(next_day(sysdate,to_char(to_date(sysdate), 'DAY')))days from dual

Answer 1

It depends on whether you want a single query (a difficult task, you may need to maintain a calendar table) or a function (or even PL SQL block). If its a function then the code would be:
DECLARE
yy_start DATE := TO_DATE('01-01-'| |TO_CHAR(TRUNC(SYSDATE),'YYYY') - 1,'YYYY');
yy_end DATE := LAST_DAY(ADD_MONTHS(yy_start,12));
tues_count NUMBER := 0;
BEGIN
FOR i IN 1..yy_end - yy_start LOOP
IF TO_CHAR(yy_start + i - 1,'DAY') = 'TUESDAY' THEN
tues_count := tues_count + 1;
END IF;
END LOOP;
--RRTURN tues_count;
END;