postgresql7.1
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')- '1 week'::interval, :first_us_weekday), 'YYYY-MM-DD')
as first_weekday_of_the_week,
to_char(next_day(to_date(:start_date, 'YYYY-MM-DD'), :last_us_weekday), 'YYYY-MM-DD')
as last_weekday_of_the_week
from dual
select to_char(start_date, :ansi_date_format) as ansi_start_date,
to_char(end_date, :ansi_date_format) as ansi_end_date,
coalesce(e.name, a.name) as name,
coalesce(e.status_summary, a.status_summary) as status_summary,
e.event_id as item_id,
(to_date(start_date,:ansi_date_format) - to_date(:first_weekday_of_the_week_tz,
:ansi_date_format)) as day_of_week,
(select type from cal_item_types where item_type_id= cal_items.item_type_id) as item_type,
cals.calendar_id,
cals.calendar_name
from acs_activities a,
acs_events e,
timespans s,
time_intervals t,
cal_items ci,
calendars cals
where e.timespan_id = s.timespan_id
and s.interval_id = t.interval_id
and e.activity_id = a.activity_id
and start_date between
to_date(:first_weekday_of_the_week_tz, :ansi_date_format) and
to_date(:last_weekday_of_the_week_tz, :ansi_date_format)
and cals.calendar_id = ci.on_which_calendar
and e.event_id = ci.cal_item_id
$calendars_clause
order by to_char(start_date, 'J'), to_char(start_date,'HH24:MI')
select to_char(to_date(:start_date, 'YYYY-MM-DD'), 'D')
as day_of_the_week,
cast(next_day(to_date(:start_date, 'YYYY-MM-DD') - cast('7 days' as interval), :first_us_weekday) as date)
as first_weekday_date,
to_char(next_day(to_date(:start_date, 'YYYY-MM-DD') - cast('7 days' as interval), :first_us_weekday),'J')
as first_weekday_julian,
cast(next_day(to_date(:start_date, 'YYYY-MM-DD') - cast('7 days' as interval), :first_us_weekday) + cast('6 days' as interval) as date)
as last_weekday_date,
to_char(next_day(to_date(:start_date, 'YYYY-MM-DD') - cast('7 days' as interval), :first_us_weekday) + cast('6 days' as interval),'J')
as last_weekday_julian,
cast(:start_date::timestamptz - cast('7 days' as interval) as date) as last_week,
to_char(:start_date::timestamptz - cast('7 days' as interval), 'Month DD, YYYY') as last_week_pretty,
cast(:start_date::timestamptz + cast('7 days' as interval) as date) as next_week,
to_char(:start_date::timestamptz + cast('7 days' as interval), 'Month DD, YYYY') as next_week_pretty
from dual