The syntax for CREATE TRIGGER in BNF is as follows:

Syntax

create trigger statement ::=
CREATE TRIGGER [owner_name.]trigname
  { BEFORE | AFTER } 
  { INSERT | DELETE | UPDATE [ OF column_name[ , ...]} 
     ON table_name[ REFERENCING { OLDROW [, NEWROW ]| NEWROW [, OLDROW ]}]
      [ FOR EACH { ROW | STATEMENT }][ IMPORT  
          java_import_clause] 
      BEGIN
          java_snippet  
      END

For more information, see CREATE TRIGGER.