Digital Options:

' ELSE ''END +CASE WHEN LinkePub IS NULL OR LinkePub='' THEN '' ELSE '' END +CASE WHEN LinkAmazon IS NULL OR LinkAmazon='' THEN '' ELSE '' END +CASE WHEN LinkIbook IS NULL OR LinkIbook='' THEN '' ELSE '' END +CASE WHEN LinkOnline IS NULL OR LinkOnline='' THEN '' ELSE '' END+''