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

Question

Possible Duplicate:
SQL Comments on Create Table on SQL Server 2008

I just want to know how to add a comment to an existing table column in SQL Server? Seems simple, but I just don't find anything in the 5 first results that throw my search engine.

edits

Rather than using the UI, I would to know the SQL query.

Answer 1

While creating a new table in SQL Server Management Studio, see this screenshot for adding a description to a column:

To do it programmatically:

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;