TO_CHAR(character) converts a text expression to the database character set.
VARCHAR2
TO_CHAR(nchar | clob | nclob)
nchar, clob, or nclob is a text expression. If it contains characters that are not represented in the database character set, then the conversion results in a loss of data.
TO_CHAR( 'David Ortiz') returns the value David Ortiz in the database character set.
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