定義一個長度為5的字符串數組
type str_array is varray(5) of varchar2(30);
v_str_array str_array := expr_key_array('aa','bb','cc','dd','ee');
for i in 1 .. v_str_array .count loop
dbms_output.put_line(v_expr_key);
end loop;
定義個變長字符串數組
type str_array is table of varchar2(20) index by binary_integer; v_str_array str_array ;