SELECT ProductName, UnitPrice FROM Products
WHERE UnitPrice = (SELECT UnitPrice FROM [Products]
WHERE ProductName = 'Aniseed Syrup');

SELECT ContactName, CompanyName, ContactTitle, Phone
    FROM Customers
WHERE CustomerID IN (SELECT CustomerID FROM Orders
WHERE OrderDate
BETWEEN # 04 / 1 / 95 # AND # 06 / 30 / 95 #);

SELECT FirstName, LastName FROM Employees
WHERE EXISTS (SELECT OrderID FROM Orders
WHERE Orders.EmployeeID = Employees.EmployeeID);