difference between two dates without weekends and holidays Sql query ORACLE -


i have 2 tables: 1st 1 contains start date , end date of purchase order, , 2nd table contains year hollidays

-purchase order

enter image description here

-holidays

i'm tryign calculate number of business days between 2 dates without weekends , holidays.

the output should this:

start date | end date | business days

could please me

you can remove non-weekend holidays query this:

select (t.end_date - t.start_date) - count(c.date) table1 t left join      calendar c      on c.date between t1.start_date , t1.end_date ,         to_char(c.date, 'd') not in ('1', '7') group t.end_date, t.start_date;

removing weekend days more complication. full weeks have 2 weekend days, easy. approximation is:

select (t.end_date - t.start_date) - (count(c.date) +        2 * floor((t.end_date - t.start_date) / 7)) table1 t left join      calendar c      on c.date between t1.start_date , t1.end_date ,         to_char(c.date, 'd') not in ('1', '7') group t.end_date, t.start_date;

this doesn't day of week, if end date before start date, in following week. however, logic gets rather complicated way oracle handles day of week, perhaps above approximation sufficient.


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