Drop all trigger in Oracle database

use the view  dba_triggers.
it is bad idea to drop ALL triggers.
Try to drop the triggers in an schema.

the idea is to define a cursor

select owner, triggername from dba_triggers where owner = 'SCOTT';

After that in a loop create a string

v_str := 'DROP TRIGGER ' || cursor_name.owner || '.' || cursor_name.triggername
execute immediate v_str;

I think you will learn many things if you try to do this.
But be carefull, do it on experimental instance, not on production.

--To drop all triggers other then sys and system schema

begin
for i in (select trigger_name,owner from dba_triggers where owner not in ('SYS','SYSTEM')) LOOP
execute immediate 'DROP TRIGGER '||i.owner||'.'||i.trigger_name;
END LOOP;
END;

mmmmnnnnn..........

should someone who does not know how to identify/drop triggers in a database;  be dropping all triggers in a database?

normal schemas' can own system triggers!!