[Probably something stupid] Can't create trigger using SQLPlus in Oracle

Question

I'm Learning Oracle and wanted to try creating a trigger. I tried this example form a book in sqlplus.

SQL> CREATE OR REPLACE TRIGGER policy_bull BEFORE insert or update
  2  ON emp
  3  FOR EACH ROW
  4  BEGIN
  5    :new.salary := 200;
  6  END
  7  /

ERROR at line 1: ORA-04089: cannot create triggers on objects owned by SYS

even though I logged in as SYS using

sqlplus "sys/oracle as sysdba"

Answer 1

You need to type / on a blank line to tell SQLPLUS to run the statement.

Answer 2

Oracle forbids creating triggers on objects owned by SYS.

Did you create the table emp as SYS? You probably want to be a regular user to do that. emp doesn't sound like a system table.

Answer 3

I think a semi-colon is missing after END. Also mention SYS.emp