Dodajesz 1 do getdate(), więc dodajesz 1 dzień
SELECT ProductName FROM tblProduct WHERE Year BETWEEN
(year(getdate()) -1) AND (year(getdate()) + 1)
Dodajesz 1 do getdate(), więc dodajesz 1 dzień
SELECT ProductName FROM tblProduct WHERE Year BETWEEN
(year(getdate()) -1) AND (year(getdate()) + 1)