SELECT individual_ref from attribute where attribute.attribute_code = 'NOMAIL' AND individual_ref IS NOT NULLBTW, what Replace(s.postcode, ' ', '') is for?
>select s.* >from sat_labellist s >join all_inner_london_postcodes a >on Replace(s.postcode, ' ', '')= a.postcode >join member >on s.[membership no] = member.membership_no >where a.area = 'Lambeth' >and s.type = 'Group' >and LEN(s.[private email]) = 0 >and member.individual_ref NOT IN (SELECT individual_ref from attribute where attribute.attribute_code = 'NOMAIL') >>