From two DATE columns in into one

[Kudy]

Hi, 
Please help to create a new table (TableB) from the existing one (TableA): 

I tried creating a new table in DAX with this but no luck,

TableB =

ADDCOLUMNS(

    'TableA',

    "ValidDate", DATESINPERIOD(DateDimension[Date], DATE(2023,01,01), 15, DAY)

)

[DataInsights]

@Kudy,

Try this calculated table:

TableB = 
SELECTCOLUMNS (
    GENERATE ( TableA, CALENDAR ( TableA[StartDate], TableA[EndDate] ) ),
    "ProductName", TableA[ProductName],
    "Date", [Date]
)