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Literal (literal) 

A literal is an unknown data object that is defined fully by virtue of its value (specifies a non-NULL value, see data type). Literal values cannot be modified. A distinction is made between string literals and numeric literals.

Syntax

<literal> ::= <string_literal> | <numeric_literal>

string_literal, numeric_literal

String literals
'69190 Walldorf'
'Anthony Smith'

Numeric literals
+0.58498
1E160
-765E-04

 

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