• Names may contain alphanumeric and special characters but must begin with an alphabetic character or an underscore (_). Database names must begin with an alphabetic character and cannot begin with an underscore.

• Case significance (upper or lower) is determined by the settings for the database in which the object is created (Ingres or ANSI/ISO Entry SQL-92-compliant) and differs for delimited and non-delimited identifiers.

• Names can contain (but cannot begin with) the following special characters: 0 through 9, #, @, $, and _. Names specified as delimited identifiers (in double quotes) can contain additional special characters.

• Database objects (such as tables, columns, views, and database procedures) cannot begin with the letters ii. Names like this are reserved for use by the DBMS Server.