It is generally a good idea to avoid naming your tables or columns using terms that are reserved by any of the languages or utilities you are likely to use at your installation. Refer to the various language and reference manuals (PL/SQL, SQL*Plus, etc.) and to this appendix for lists of reserved words.
Consult the Oracle7 Server SQL Reference for a list of words that are reserved by SQL. Tables or columns that have these names must also be specified in double quotation marks.