Może przez zmęczenie ale nie rozumiem czemu zapytanie zwraca mi zwielokrotnione wyniki gdy dodaję niepotrzebnie ordersdetails
Poprawne zapytanie
Select Department.Name, Orders.OrderNumber, Orders.OrderDate,DATENAME(WEEKDAY,OrderDate) as 'Dzień',
UPPER(SUBSTRING(FirstName,1,3) + SUBSTRING(LastName,1,3)) as 'kod pracownika'
from Orders inner join Employee on Employee.Id = Orders.EmployeeId
inner join Department on Employee.DepartmentId = Department.Id
where Department.Name='IT' Order by Orders.OrderDate
Niepoprawne zapytanie
Select Department.Name, Orders.OrderNumber, Orders.OrderDate,DATENAME(WEEKDAY,OrderDate) as 'Dzień',
UPPER(SUBSTRING(FirstName,1,3) + SUBSTRING(LastName,1,3)) as 'kod pracownika'
from Orders inner join OrderDetails on Orders.Id = OrderDetails.OrderId inner join Employee on Employee.Id = Orders.EmployeeId
inner join Department on Employee.DepartmentId = Department.Id
where Department.Name='IT' Order by Orders.OrderDate
