How do you comment an MS-access Query?

I decided to add a condition to the Where Clause that always evaluates true but allows the coder to find your comment.

Select
   ...
From
   ...
Where
   ....
   And "Comment: FYI, Access doesn't support normal comments!"<>""

The last line always evaluates to true so it doesn't affect the data returned but allows you to leave a comment for the next guy.

NOTE: Confirmed with Access 2003, don't know about earlier versions.

For a query in an MDB you can right-click in the query designer (anywhere in the empty space where the tables are), select Properties from the context menu, and enter text in the Description property.

You're limited to 256 characters, but it's better than nothing.

You can get at the description programatically with something like this:

Dim db As Database
Dim qry As QueryDef

Set db = Application.CurrentDb
Set qry = db.QueryDefs("myQuery")

Debug.Print qry.Properties("Description")

I know this question is very old, but I would like to add a few points, strangely omitted:

1. you can right-click the query in the container, and click properties, and fill that with your description. The text you input that way is also accessible in design view, in the Descrption property
2. Each field can be documented as well. Just make sure the properties window is open, then click the query field you want to document, and fill the Description (just above the too little known Format property)

It's a bit sad that no product (I know of) documents these query fields descriptions and expressions.

It is not possible to add comments to 'normal' Access queries, that is, a QueryDef in an mdb, which is why a number of people recommend storing the sql for queries in a table.