oracle8.1.6
select to_char(to_date(:start_date, 'YYYY-MM-DD'), 'D')
as day_of_the_week,
to_char(next_day(to_date(:start_date, 'YYYY-MM-DD')-7, :first_us_weekday))
as first_weekday_of_the_week,
to_char(next_day(to_date(:start_date, 'YYYY-MM-DD')-7, :first_us_weekday) + 6)
as last_weekday_of_the_week
from dual
, to_char(to_date(:start_date, 'YYYY-MM-DD'), 'D') as day_of_the_week
select to_char(to_date(:start_date, 'YYYY-MM-DD'), 'D') as day_of_the_week,
next_day(to_date(:start_date, 'YYYY-MM-DD') - 7, :first_us_weekday) as first_weekday_date,
to_char(next_day(to_date(:start_date, 'YYYY-MM-DD') - 7, :first_us_weekday),'J') as first_weekday_julian,
next_day(to_date(:start_date, 'YYYY-MM-DD') - 7, :first_us_weekday) + 6 as last_weekday_date,
to_char(next_day(to_date(:start_date, 'YYYY-MM-DD') - 7, :first_us_weekday) + 6,'J') as last_weekday_julian,
to_char(to_date(:start_date) - 7, 'YYYY-MM-DD') as last_week,
to_char(to_date(:start_date) - 7, 'Month DD, YYYY') as last_week_pretty,
to_char(to_date(:start_date) + 7, 'YYYY-MM-DD') as next_week,
to_char(to_date(:start_date) + 7, 'Month DD, YYYY') as next_week_pretty
from dual