upload a pdf file directly into a sql server existing table

Question

I need to upload an  pdf to a column in SQL Server  existing table.

SELECT TOP (1000) [Id]
      ,[Name]
      ,[EntryDate]
      ,[Attachment]
      ,[IsActive]
      ,[Remarks]
  FROM [db].[dbo].[Mst]

i want upload pdf files directly in column Attachment.

How can i do?