SSMS and SSRS to Excel enable for more than 255 columns when copy-pasting.
SSIS does not allow for more than 255 colum
Refer the link. Best would be to create an script in SSIS to copy the content as csv format. You can use c# or VB.Net.
There are a lot of Limitations when exporting to an Excel Files using Sql server data tools
You can do some workaround to achieve this:
FlatFile
(csv)Note: you have to add Microsoft.Office.Interop.Excel.dll
file to the following directories (.Net Framework dll directory) C:\Windows\Microsoft.NET\Framework\v2.0.50727
and (sql server data tools dll directory) C:\Program Files\Microsoft SQL Server\100\DTS\Binn
(using vs 2005 and sql 2008) and then add this dll as a reference in your script task
Imports Microsoft.Office.Interop
Public Sub ConvertCSVToExcel(Fromcsv As String, Toxlsx As String)
Dim Exl As New Excel.Application()
Try
Dim wb1 As Excel.Workbook = Exl.Workbooks.Open(Fromcsv, Format:=4)
wb1.SaveAs(Toxlsx, FileFormat:=XlFileFormat.xlOpenXMLWorkbook)
wb1.Close()
Exl.Quit()
Catch ex As Exception
Exl.DisplayAlerts = False
Exl.Quit()
End Try
End Sub
Or you have to use a third party components like cozyRoc SSIS+
if you are looking to Import data from excel with more than 255 columns you can follow this Link
Third party components
Workaround