SQL Select Return Default Value If Null

Question

Database: MS SQL 2008

SELECT Listing.Title, Listing.MLS, Pictures.PictureTH, Pictures.Picture, Listing.ID 
FROM Listing INNER JOIN Pictures          


        

Answer 1

if you want to set the default value if the Pic is null you can do this via COALESCE key word:

SELECT Listing.Title, Listing.MLS, Pictures.PictureTH, 
COALESCE (Pictures.Picture, 'default.jpg') AS Pictures, Listing.ID 
FROM Listing LEFT JOIN Pictures 
ON Listing.ID = Pictures.ListingID
WHERE (Pictures.ID = (SELECT MIN(ID) 
FROM Pictures WHERE (ListingID = Listing.ID)))

You can also achieve this via IsNull like below:

SELECT Listing.Title, Listing.MLS, Pictures.PictureTH, 
ISNULL(Pictures.Picture, 'default.jpg') AS Pictures, Listing.ID 
FROM Listing LEFT JOIN Pictures 
ON Listing.ID = Pictures.ListingID
WHERE (Pictures.ID = (SELECT MIN(ID) 
FROM Pictures WHERE (ListingID = Listing.ID)))

you can read here about IsNull and Coalesce