WebMembers Table

The WebMembers table stores the list of members of a SharePoint site.

Warning  Modifying the database schema or database structures is unsupported. Changes that you make to the database contents may be overwritten when you install updates or service packs for Windows SharePoint Services, or when you upgrade an installation to the next product version.

Columns

Column name	Data type	Description
WebId	uniqueidentifier	GUID of the site. Found in the Webs table.
UserId	int	ID of the user. Found in the UserInfo table.
STSToken	varbinary	Token for all of the site groups to which this user belongs, either directly or indirectly.