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yaman
Posting Yak Master

213 Posts

Posted - 2008-09-24 : 06:07:32

Sir i have two tables :-

1. Train Table ( Trainid , Trainname , Totalseats )
2. Transactions Table
( Transactionid, Trainid, OccupiedSeat, ArrivalTime,Departuretime)

Now i want to find Available Seats in a train in a Fix time .
Data of table Transaction
Transactionid Trainid OccupiedSeat ArrivalTime Departuretime
1 2315 10 1PM 2PM
2 2315 20 2PM 3PM
3 2315 30 3PM 4PM

How can i find out .

Yaman

SwePeso
Patron Saint of Lost Yaks

30421 Posts

Posted - 2008-09-24 : 06:15:12

[code]DECLARE @Train TABLE
(
TrainID INT,
TrainName VARCHAR(20),
TotalSeats INT
)

INSERT @Train
SELECT 2315, 'SQLTeam', 63

DECLARE @Transactions TABLE
(
TransactionID INT,
TrainID INT,
OccupiedSeat INT,
ArrivalTime DATETIME,
Departuretime DATETIME
)

INSERT @Transactions
SELECT 1, 2315, 10, '1PM', '2PM' UNION ALL
SELECT 2, 2315, 20, '2PM', '3PM' UNION ALL
SELECT 3, 2315, 30, '3PM', '4PM'

DECLARE @MyTime DATETIME

SET @MyTime = '1:30PM'

SELECT t.TrainID,
t.TrainName,
t.TotalSeats,
s.OccupiedSeat,
t.TotalSeats - s.OccupiedSeat AS AvailableSeats
FROM @Train AS t
INNER JOIN @Transactions AS s ON s.TrainID = t.TrainID
WHERE @MyTime BETWEEN s.ArrivalTime AND s.DepartureTime[/code]

E 12°55'05.63"
N 56°04'39.26"

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2008-09-24 : 07:21:24

quote:
Originally posted by yaman

Sir i have two tables :-

1. Train Table ( Trainid , Trainname , Totalseats )
2. Transactions Table
( Transactionid, Trainid, OccupiedSeat, ArrivalTime,Departuretime)

Now i want to find Available Seats in a train in a Fix time .
Data of table Transaction
Transactionid Trainid OccupiedSeat ArrivalTime Departuretime
1 2315 10 1PM 2PM
2 2315 20 2PM 3PM
3 2315 30 3PM 4PM

How can i find out .

Yaman

does occupied seat represent the occupied seat number or is it number of occupied seats at that time?

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