Question

Okay, so I have this T-SQL statement:

SELECT 
    COUNT(DISTINCT RentalNo) as Count 
FROM 
    RoomRental AS rr 
    LEFT JOIN 
        RoomLinks AS r 
        On (r.RoomNo1 = rr.RoomNo OR r.RoomNo2 = rr.RoomNo) 
        AND r.CostCentreNo = rr.CostCentreNo
WHERE Cancelled = 0 
    AND (rr.RoomNo = @RN OR r.RoomNo2 = @RN OR r.RoomNo1 = @RN) 
    AND rr.CostCentreNo = @CCN 
    AND StartDate = @StartDate
    AND DATEADD(minute,0-SetupTime,StartTime) < @EndBlock 
    AND DATEADD(minute,BreakdownTime,EndTime) > @StartBlock)

Is there any way I can store SELECT *, of it, and then quickly (without applying the statement again), get the RentalNos, or apply another AND to the WHERE clause?

Note, this is just an example of my SQL query, I currently have a loop going around, as it goes through all time blocks, (after first querying the first ending).

Basically, there is a lot of similar SQL query repetition. And it would be great If I could store once and manipulate that instead.

Cheers,

Paul

Answer 1

Use SELECT INTO and store the results in a temporary table (the # prefix is used for a temporary table)

SELECT yourcols, ...
INTO #table
FROM yourtables...

Then you can reference #table just like any other physically stored table, join to it, etc.