oracle natural using join 区别

<span>create table test_table_A(id number primary key,name varchar(32));
create table test_table_B(id number primary key,name varchar(32),des varchar(32));
select *from test_table_A;
select *from test_table_B;
insert into test_table_A(id, name) values(1,'cuiyaonan20 a');
insert into test_table_A(id, name) values(2,'cuiyaonan200 a');
insert into test_table_A(id, name) values(3,'cuiyaonan2000 a');
insert into test_table_A(id, name) values(4,'cuiyaonan2000@163.com a ');

insert into test_table_B values(1,'cuiyaonan20 a','des 1');
insert into test_table_B values(2,'cuiyaonan200 a','des 2');
insert into test_table_B values(3,'cuiyaonan2000 a','des 3');
insert into test_table_B values(4,'cuiyaonan20 b','des 1');
insert into test_table_B values(5,'cuiyaonan200 b','des 2');
insert into test_table_B values(6,'cuiyaonan2000 b','des 3');</span>

select *from test_table_a natural join test_table_b;

select *from test_table_a join test_table_b using(name);