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Character Set (token) Locate the document in the library structure

A character set (token) comprises a series of characters that are combined to form a lexical unit. A distinction is made between regular and delimiter tokens.

Syntax

<token> ::= <regular token> | <delimiter token>

<regular_token> ::= <literal> | <key_word> | <identifier> | <parameter_name>

<delimiter_token> ::= ( | ) | , | . | + | - | * | / | < | > | <> | != | = | <= | >=
| ~= | ~< | ~>
(for computers with ASCII code)

Example

SELECT * FROM reservation
ALTER TABLE reservation DROP FOREIGN KEY customer_reservation
'Reisen10'

Explanation

Each token can be followed by any number of blanks. Each regular token regular_token must be followed by a delimiter_token or a blank.

Double quotation marks within a special identifier are represented by two consecutive quotation marks.

 

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