Procedure or function

Hi!
My description might not be clear at first sight, but I will try to explain:
Introduction: We have a master flight information table that stores information about each flight including the flight date, i.e.
Flight master table
Flight_no From Leaving To Arrival Date
UA234 JFK 10:40 LAX 15:50 1-JAN-07
UA234 JFK 10:40 LAX 15:50 2-JAN-07
There are about 700 flights x 365 (daily flights) entries = 255.500 rows. We want to improve the overall performance of our database with a PL/SQL-procedure or function that should do the following:
Instead of having the flight date entered 365 times for each flight, have the procedure or function calculate and show the flight dates according to the flight frequency for each month, i.e.
Flight master table new
Flight_no From Leaving To Arrival January February
UA234 JFK 10:40 LAX 15:50 12345671234567….. .....
UA234 JFK 10:40 LAX 15:50 12345671234567….. .....
If not a daily flight, then
UA786 IAD 12:10 SFO 18:05 12345--12345-- ......
Frequency: 1 = Monday, 2 = Tuesday, 3 = Wednesday ….
(12345671234567….. means for all days in a month)
So, we would have only 700 records to search through.
Thanks for any suggestions!

This looks like the type of table which data is entered once and retrieved many times. And that's why I'd stick with the current implementation. It seems like you are introducing all kind of complexities only for storage reasons. Performance is generally better when not having to calculate each date by decoding a '12345--' field and making up rows for a larger period.
>So, we would have only 700 records to search through.
Alternative idea: why not have a 700 record flight table and a separate 255.500 record flight_times table
flight: (no, from, to)
flight_times (flight_no, departure_time, arrival_time)
Regards,
Rob.

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when i am uning line_seq its giving an error
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Message was edited by:
user579585
Message was edited by:
user579585

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