How to add dummy Data in a sql server table

1) Write Query that will insert data in a table

INSERT [dbo].[Ads] ( [ReferenceNumber], [AdName], [AdDescription], [City_Id], [Model_Id], [Year], [TransmittionType], [Color], [FuelType], [RegionalSpecs], [MortgageDetails], [AskingPrice], [MileageKM], [IsFeatured], [Account_Id], [AdStatus_Id], [TicketsQuantity], [RemainingTicketsQuantity], [CreatedDate], [ExpiryDate], [TicketPrice], [AboutWarrenty], [BodyType], [ServiceHistory], [DeleteReason], [MulkiyaFrontURL], [MulkiyaBackURL], [OwnershipDocumentURL], [OwnershipType], [IsUserFavouirte]) VALUES (N'WD-1492555', N'Audi  for sale', N'Description', 2, 432, 2010, N'Automatic Transmission', N'Silver', N'Diesel', N'Japanese Specs', NULL, CAST(10000.00 AS Decimal(18, 2)), 123, 1, 133, 1, 600, 598, CAST(0x0000A8CB01187186 AS DateTime), CAST(0x0000A8D2013A36E0 AS DateTime), CAST(25.00 AS Decimal(18, 2)), N'Yes', N'Sports Car', 1, NULL, NULL, NULL, N'6366006006380526061.pdf', N'otherOwnershipDoc', NULL)

2) Create  a while loop that will  repate that query

DECLARE @i int = 0

WHILE @i < 20

BEGIN

    SET @i = @i + 1

    /* do some work */

END

3) merg result will be  below

DECLARE @i int = 0

WHILE @i < 20

BEGIN

    SET @i = @i + 1

    /* do some work */

INSERT [dbo].[Ads] ( [ReferenceNumber], [AdName], [AdDescription], [City_Id], [Model_Id], [Year], [TransmittionType], [Color], [FuelType], [RegionalSpecs], [MortgageDetails], [AskingPrice], [MileageKM], [IsFeatured], [Account_Id], [AdStatus_Id], [TicketsQuantity], [RemainingTicketsQuantity], [CreatedDate], [ExpiryDate], [TicketPrice], [AboutWarrenty], [BodyType], [ServiceHistory], [DeleteReason], [MulkiyaFrontURL], [MulkiyaBackURL], [OwnershipDocumentURL], [OwnershipType], [IsUserFavouirte]) VALUES (N'WD-1492555', N'Audi  for sale', N'Description', 2, 432, 2010, N'Automatic Transmission', N'Silver', N'Diesel', N'Japanese Specs', NULL, CAST(10000.00 AS Decimal(18, 2)), 123, 1, 133, 1, 600, 598, CAST(0x0000A8CB01187186 AS DateTime), CAST(0x0000A8D2013A36E0 AS DateTime), CAST(25.00 AS Decimal(18, 2)), N'Yes', N'Sports Car', 1, NULL, NULL, NULL, N'6366006006380526061.pdf', N'otherOwnershipDoc', NULL)

/**/

END