pl/sql异常之zero-divide(试图被零除)小例子

declare
v_n1 number := 50;
v_n2 number := 0 ;
v_n3 number;
begin
v_n3 := v_n1/v_n2;
dbms_output.put_line('v_n3=' || v_n3);
exception
when zero_divide then
dbms_output.put_line('v_n2 can' || '''' || 't be 0');
end;