Question

I’m a MySQL guy these days and have a .NET project that I’m working on and can’t figure out how to dynamically generate and return a field(column) from a table, based on two fields in the table.

There are two fields bRentable and bRented in the Units table and I need to return a field called reserved if bRentable and bRented are equal to zero.

Here is the SQL I have so far

/* Units Query */
SELECT Units.UnitID, Units.dcWidth, Units.dcLength, Units.dcPushRate, 
       Units.dcStdRate, Units.UnitTypeID, UnitTypes.sTypeName, Units.bRentable     
FROM Units
INNER JOIN UnitTypes ON Units.UnitTypeID = UnitTypes.UnitTypeID

Any help would be greatly appreciated.

Answer 1

You can add the following as another column to your select statement:

(cast case 
when (bRentable = 0 and bRented = 0) then 1 
else 0 
end as bit) as reserved

Edit: Updated based on OPs comment:

SELECT Units.UnitID, Units.dcWidth, Units.dcLength, Units.dcPushRate, 
       Units.dcStdRate, Units.UnitTypeID, UnitTypes.sTypeName, Units.bRentable,(cast case 
    when (bRentable = 0 and bRented = 0) then 1 
    else 0 
    end as bit) as reserved   
FROM Units
INNER JOIN UnitTypes ON Units.UnitTypeID = UnitTypes.UnitTypeID