--  ROW generates a table with one row only.
--  You provide the name of the columns and their values.
EVALUATE
    ROW ( 
        "Sales in 2009", CALCULATE ( [Sales Amount], 'Date'[Calendar Year] = "CY 2009" ),
        "Sales in 2008", CALCULATE ( [Sales Amount], 'Date'[Calendar Year] = "CY 2008" )
    )

--  Expressions evaluated in ROW respect the filter context.
EVALUATE
CALCULATETABLE (
    ROW (
        "Sales in 2009", CALCULATE ( [Sales Amount], 'Date'[Calendar Year] = "CY 2009" ),
        "Sales in 2008", CALCULATE ( [Sales Amount], 'Date'[Calendar Year] = "CY 2008" )
    ),
    'Product'[Brand] = "Contoso"
)

--  ROW controls the name of the columns, whereas the table constructor
--  automatically assigns column names. You must use SELECTCOLUMNS to control
--  the column names of a table constructor as you do in ROW.
DEFINE
    VAR Sales_2009_2008 =
        {
             ( CALCULATE ( [Sales Amount], 'Date'[Calendar Year] = "CY 2009" ), CALCULATE ( [Sales Amount], 'Date'[Calendar Year] = "CY 2008" ) )
        }
    VAR RenamedColumns =
        SELECTCOLUMNS (
            Sales_2009_2008,
            "Sales in 2009", [Value1],
            "Sales in 2008", [Value2]
        )

EVALUATE
Sales_2009_2008

EVALUATE
RenamedColumns