SELECT m.u_m_name, m.u_m_pwd, b.u_name, b.u_pwd //查询2个表中的字段 FROM m_user AS m INNER JOIN b_tee AS b //内部链接2个表 （AS：别名） ON m.m_ID = b.m_ID AND b.u_j = 'false' AND b.u_JH = 'false' //查询条件