The ? wild cardA character used to substitute for unknown information. A question mark (?) is a substitute for one unknown character and an asterisk (*) can be used to substitute for one or more unknown characters. may be used when searching for dates. For example, if all dates in January 2005 are to be returned, the search could be entered in either of the following ways:
- "Jan ?? 2005"
- Jan AND 2005.
If all dates in January of any year are to be searched, the search criteria could be entered as:
- Jan
- "Jan ?? ????"
All dates in January of February of any year could be searched in any of the following ways:
- Jan OR Feb
- "Jan ?? ????" OR "Feb ?? ????"