How to create new records base on row data(date format)?

Hi,

This M code works

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WcjQwVNJRMjDTNTDXNTIwMgJxLOCcWB2QCrCgCbIKhPLYWAA=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [#"Employee ID" = _t, #"Start Date of Biztrip" = _t, #"End Date of Biztrip" = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Employee ID", type text}, {"Start Date of Biztrip", type date}, {"End Date of Biztrip", type date}}),
    #"Added Custom" = Table.AddColumn(#"Changed Type", "Date", each {Number.From([Start Date of Biztrip])..Number.From([End Date of Biztrip])}),
    #"Expanded Date" = Table.ExpandListColumn(#"Added Custom", "Date"),
    #"Changed Type1" = Table.TransformColumnTypes(#"Expanded Date",{{"Date", type date}}),
    #"Removed Columns" = Table.RemoveColumns(#"Changed Type1",{"Start Date of Biztrip", "End Date of Biztrip"})
in
    #"Removed Columns"

Hope this helps.