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Token 

A character set or 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, delimiter_token

SELECT * FROM reservation
ALTER TABLE reservation DROP FOREIGN KEY customer_reservation

Explanation

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

Double quotes within a special identifier are represented by two consecutive quotes.

 

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