How to search whether a seat is available or not?

Question

Hi,
I am developing a form in admin module for a call centre where there is a requirement to check whether a seat is available or not? The form contains a search window which the user enters the date in Location,catergory,From_date,to_date,time_from,time_to fields.
For example if he enters time_from as 06:00and time_from as 14:00 .That means the seat is occupied for 8 hours but is available for the remaining 16 hours. So the search result should show this seat also in the availability list. Every seat hava a unique seat_id.
another situation is a seat can be allocated between 22:00 and 06:00.That means it is crossing the day.That means that means in a day the seat is allocated from 00:00 - 06:00 and 22:00-23:59. How to search for this?
The seat can be allocated for any number of hours in a day. It can be 2 hours .3 hours or 4 hours....means there is no particular time slot system.
Can this be done using a sql query or plsql procedure?
can anybody help me in this regard
Thanking you,
Deekshit

Answer 1

Hi
U can use the following query in function.
SELECT CASE dumm
WHEN 'X'
THEN 'OK'
END
FROM (SELECT NVL (dummy, 'Y') dumm
FROM DUAL
WHERE TO_DATE (new_date_entered in varchar format, 'hh24:mi:ss') BETWEEN TO_DATE
(date_from in varchar format,
'hh24:mi:ss'
AND TO_DATE
(date_to in varchar format,
'hh24:mi:ss'
But need to b careful when the dates r changing. U can check dat by comparing time_from nd time_to values...in case of date change time_from value will be greater than time_to value(assumption==> seat can't be blocked for more than 12 hours). U can actually use the same query by reversing the conditions.. hope this will solve the problem
Message was edited by:
Arpit