Restrictions | Regular Identifiers | Delimited Identifiers |
Quotes | Specified without quotes | Specified in double quotes |
Keywords | Cannot be a keyword | Can be a keyword |
Valid special characters | “At” sign (@) (not ANSI/ISO) Crosshatch (#) (not ANSI/ISO) Dollar sign ($) (not ANSI/ISO) Underscore (_) | Ampersand (&) Asterisk (*) “At” sign (@) Backslash (\) Braces ({ }) Caret (^) Colon (:) Comma (,) Crosshatch (#) Dollar sign ($) Double quotes (") Equal sign (=) Exclamation point (!) Forward slash (/) Left and right caret (< >) Left and right parentheses Left quote (ASCII 96 or X'60') Hyphen (-) Percent sign (%) Period (.) Plus sign (+) Question mark (?) Semicolon (;) Single quote (') Space Tilde (~) Underscore (_) Vertical bar (|) |