To check the date range

Question

Hi,
I have a table that records the leave for employees. Like employee id , leave start date, leave end date and total hours. I need to find out , if the start date or end date was on weekend , or if the date range includes weekends . And there is one more table that stores public holidays. I also need to check if the leave start date or end date was on the public holiday or the range includes any public holidays.
Thanks

Answer 1

Hi,
Assuming the time of day for all the dates involved is the same (e.g., if they are all TRUNCated DATEs, where the time is 00:00:00), that leave_start_date <= leave_end_date, and that the weekend consiists of Saturday and Sunday, you can do something like this:
SELECT     leave_start_date
,     leave_end_date
,     CASE
         WHEN  TRUNC (leave_start_date, 'IW')     < TRUNC (leave_end_date + 2, 'IW')
         THEN  'Includes Saturday or Sunday'
         ELSE  'No weekend'
     END              AS weekend
,     CASE
         WHEN  EXISTS (
                          SELECT  1
                    FROM    holiday_table
                    WHERE   holiday_date BETWEEN m.leave_start_date
                                          AND       m.leave_end_date
         THEN  'Leave includes at least 1 holiday'
         ELSE  'No holidays'
     END          AS holiday
FROM     leave_table     m
;This does not depend on your NLS settings.
I hope this answers your question.
If not, post a little sample data (CREATE TABLE and INSERT statements, relevant columns only) for both tables, and also post the results you want from that data, as Andy requested.
Explain, using specific examples, how you get those results from that data.
Always say which version of Oracle you're using.