The following conventions are used in SQL Server Books Online to distinguish elements of text.
Database names, table names, column names, stored procedures, command-prompt utilities, data types, menus, commands, dialog box options, programming elements, and text that must be typed exactly as shown.
User-supplied variables, relationships, parameters, placeholders, and new terms in SQL Server.
Code samples, examples, display text, and error messages.
Untranslated English text (localized SQL Server versions only)
References to the data that is contained in sample databases, or other data that is used in examples.