Users require a password (password) to connect to the database instance (start a database session).
<password> ::= <identifier>
<first_password_character> ::= <digit>
<digit> ::= 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9
<letter> ::= A | B | C | D | E | F | G | H | I | J
| K | L | M | N | O | P | Q | R | S | T
| U | V | W | X | Y | Z
| a | b | c | d | e | f | g | h | i | j
| k | l | m | n | o | p | q | r | s | t
| u | v | w | x | y | z
<extended_letter> ::= # | @ | $
<identifier_tail_character> ::= <digit>
<underscore> ::= _
Passwords are truncated after 18 characters.
A language-specific character language_specific_character is any letter that occurs in a northern, southern, or central European language and is not contained in the list of letters.
German umlauts: д, ц, ь
French letters with a “grave” accent: а
If you have installed a UNICODE-enabled database instance, a language-specific character is a character that is not included in the ASCII code list from 0 to 127.
Concepts of the Database System, Conventions for User Names and Passwords