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- use ABDUczelnia
- select distinct nazwisko, imie, Nip
- from Wykladowcy as s join oceny as o on o.IdWykladowcy = o.IdStudenta
- where o.ocena=2 and year(o.DataOceny)=2013 and month(o.dataoceny)<7
- group by imie, nazwisko, Nip
- having count(o.ocena)>=2
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