{ ADD add_column_options | MODIFY modify_column_options | drop_column_clause | drop_constraint_clause | parallel_clause | external_data_properties | REJECT LIMIT { integer | UNLIMITED } } [ ADD add_column_options | MODIFY modify_column_options | drop_column_clause | drop_constraint_clause | parallel_clause | external_data_properties | REJECT LIMIT { integer | UNLIMITED } ]...
For information on the symbols and conventions of Backus-Naur Form (BNF) syntax, see Appendix A.