sql - How make query with unique? -


i have query:

select top 20 f.id_service f_id_service,               f.id_city    f_id_city,               f.name       f_name,               f.address    f_address,               f.business   f_business,               f.web        f_web,               f.phone      f_phone,               f.id_firm    f_id_firm   firm f        left join price p          on p.id_service = f.id_service             , p.id_city = f.id_city             , p.id_firm = f.id_firm  f.name not in (select distinct top 20 f.name                         firm f                        f.blocked = '0'                              , ( f.name 'АВТО%'                                     or f.phone 'АВТО%' )                              , ( f.phone != ''                                     or f.address != '' )                              , f.id_city = '73041'                       order  f.name asc)        , f.dogovor = '1'        , f.blocked = '0'        , ( f.name 'АВТО%'               or f.phone 'АВТО%' )        , ( f.phone != ''               or f.address != '' )        , f.id_city = '73041

tell me please how make query select unique f.name ?

change select this

select distinct top 20      f.name f_name ...

you can't have columns values distinct 1 of them: makes no sense.


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