Du kan göra det genom att lägga till några konkatoperationer.
Kontrollera nedanstående kod det borde fungera.
SELECT CONCAT(housename, CONCAT(" ",CONCAT(housenumber, CONCAT(" ",CONCAT_WS(' ,',
NULLIF(address1, ''),
NULLIF(address2, ''),
NULLIF(address3, ''),
NULLIF(town, ''),
NULLIF(postcode, '')))))) AS concatedAddress FROM tblAddress;