| Oracle9i SQL Reference Release 2 (9.2) Part Number A96540-02  | 
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rowidtonchar::=
 ROWIDTONCHAR converts a rowid value to NVARCHAR2 datatype. The result of this conversion is always 18 characters long.
SELECT LENGTHB( ROWIDTONCHAR(ROWID) ), ROWIDTONCHAR(ROWID) FROM employees; LENGTHB(ROWIDTONCHAR(ROWID)) ROWIDTONCHAR(ROWID ---------------------------- ------------------ 36 AAAFfIAAFAAAABSAAA . . .