How to find how many sundays in a year

Question

Hi friends...
how to find the how many sundays in a year?
can u give me the query?

Answer 1

Sybrand's approach can still be made to work. His formula actually calculates the number of weeks between the first and last Sunday of the year, so he needs to add one to get the number of Sundays (or calculate the number of weeks between to the first sunday of the following year). It also needs a tweak to deal with cases when the year starts or ends on a Sunday because next_day will return the following Sunday.
with t as (
select add_months(trunc(sysdate,'YEAR'),12*(level-20)) as yr from dual connect by level <= 40
select extract(YEAR from yr) as yr,
(next_day(add_months(yr, 12)-1,'SUN')
next_day(yr-1, 'SUN'))/7 as sundays
from t
order by yr
YR                     SUNDAYS
1991                   52
1992                   52
1993                   52
1994                   52
1995                   53
1996                   52
1997                   52
1998                   52
1999                   52
2000                   53
2001                   52
2002                   52
2003                   52
2004                   52
2005                   52
2006                   53
2007                   52
2008                   52
2009                   52
2010                   52
2011                   52
2012                   53
2013                   52
2014                   52
2015                   52
2016                   52
2017                   53
2018                   52
2019                   52
2020                   52
2021                   52
2022                   52
2023                   53
2024                   52
2025                   52
2026                   52
2027                   52
2028                   53
2029                   52
2030                   52Regards,
Bob