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Strings are quoted in single quotes  (for example 'string'). All characters are printed as they are with exception of single quote that is doubled ( - e.g. two single quotes '' are encoding represents one single quote inside the string and not end of the string (for example 'Jarcec''s notes'). One quoted single quote is represented by four single qootes -- '''' represents just one ' (first one is opening, than there are two single quotes in a row that encodes one single quote inside the string and lastly the last single quote is representing end of the string). Null byte (0x00) is not allowed inside string constants.  Binary constants are also quoted in single quotes, however all binary bytes are converted to hexa (with \x prefix  - for example '\x4d7953514c' stands for string 'MySQL' (saved in binary column like bytea).

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