CREATE [OR REPLACE] TRIGGER [schema .] trigger
{ BEFORE | AFTER | INSTEAD OF }
{ dml_event_clause
| { ddl_event [OR ddl_event]...
| database_event [OR database_event]...
}
ON { [schema .] SCHEMA | DATABASE }
}
[WHEN ( condition ) ]
{ pl/sql_block | call_procedure_statement }For information on the symbols and conventions of Backus-Naur Form (BNF) syntax, see Appendix A.