A string literal is a sequence of characters enclosed in single quotes. For example,
'Hello world' is a string literal of type CHAR. Its byte length is 11, and its character length is also 11.
A string literal is sometimes referred to as a string constant, literal string, or just as a string. In SQL Anywhere, the preferred term is string literal.
You can specify an NCHAR string literal by prefixing the quoted value with N. For example,
N'Hello world' is a string literal of type NCHAR. Its byte length is 11, and its character length is 11. The bytes within an NCHAR string
literal are interpreted using the database's CHAR character set, and then converted to NCHAR. The syntax
N'string' is a shortened form for
CAST( 'string' AS NCHAR ).
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