Use this option to perform a query without spatial constraints. It is best used to perform queries on physical properties across a whole catalog. Such queries can be set up by taking advantage of the column constraints and the additional constraints features. See the documentation on these features for further details.
Output tables on queries without spatial constraints can be very large, so returning a count of the number of objects found to gauge the size of the output tables is recommended. To do this, select the All-Sky Source Counts Only option on the web form.
Queries in this mode often take a long time, so using the email notification method is recommended.
You can see an example of this search type here.