MySQL Join详细说明

  +------+----------+---------+
  5 rows in set (0.00 sec)

  # 我们再把 table 的位置交换一下,再用 right join 试试

  select a.id,a.name,b.dept_id
  from emp_dept b right join emp a on (a.id=b.emp_id);

  mysql> select a.id,a.name,b.dept_id
  -> from emp_dept b right join emp a on (a.id=b.emp_id);
  +----+-----------+---------+
 

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