You won't be hiding them in your table. You can hide them in your form or
report. No-one has any business looking at your tables!
You haven't given your field name (you may find it easier to follow
instructions if you do this in future posts)
In your query, on which your form is based, you could add this to the query
OnlyYes: IIF([YourYesNoField]=False, "", "Yes")
In your report, you will use code in the On Format Event of the section
containing the control
The code will look like this
If Me.[YourYesNoField]=False Then
Me.[YourYesNoField].Visible = False
Else
Me.[YourYesNoField].Visible = True
End If
Evi