A column name is an identifier preceded by an optional correlation name. A correlation name is usually a table name. For more information about correlation names, see FROM clause.

If a column name has characters other than letters, digits and underscore, it must be surrounded by quotation marks (""). For example, the following are valid column names:

• Employees.Name
• address
• "date hired"
• "salary"."date paid"

See also: Identifiers.