MySQL if not exists by two columns update other -


i want insert record if not exists 2 columns, , if exists update column 3, here's query:

insert aktai_islaidos_id (akto_id, islaidos_id, savikaina)        select * (select ? a, ? b, ? c) tmp        not exists (              select akto_id, islaidos_id, savikaina aktai_islaidos_id               akto_id = , islaidos_id = b        ) on duplicate key update savikaina = values(c);

now i'm getting error c not exists in fields list, understand why, didn't know how complete query correctly , didn't find examples selects duplicate columns, thanks!

edit: figured out stored procedure:

create procedure update(        in akt_id int,        in isl_id int,        in sav int) begin        if (select count(*) aktai_islaidos_id akto_id = akt_id , islaidos_id = isl_id) > 0             begin                  update aktai_islaidos_id set savikaina = sav akto_id = akt_id , islaidos_id = isl_id;             end;        else             begin                  insert aktai_islaidos_id (akto_id, islaidos_id, savikaina) values (akt_id, isl_id, sav);             end;        end if; end


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