How to add a comment to an existing table column in SQL Server? [duplicate]

Answer 1

While creating the new table in the SQL Server Management Studio, Please refer to the below mentioned screen shot for adding the description to a column.

Another way to do it programatically

EXEC sp_updateextendedproperty 
@name = N'MS_Description', @value = 'Your description',
@level0type = N'Schema', @level0name = dbo, 
@level1type = N'Table',  @level1name = Your Table Name, 
@level2type = N'Column', @level2name = Yuur Column Name;