select c.id as cid, c.name as cname, s.id as sid, s.code , s.name as sname, s.gender, s.age, t.id as id, t.name as name -- from student s,teacher t,class c where s.class_id=c.id -- and t.id=(select c.teacher_id from class c where c.id=#{id}) from class c left outer join student s on c.id=s.class_id left OUTER join teacher t on t.id=c.teacher_id where c.id = 1用嵌套方式怎么写

以下是使用子查询的方式来嵌套查询：

SELECT c.id as cid, c.name as cname, s.id as sid, s.code, s.name as sname, s.gender, s.age, t.id as tid, t.name as tname 
FROM (
    SELECT * FROM class WHERE id = 1
) c 
LEFT OUTER JOIN student s ON c.id = s.class_id 
LEFT OUTER JOIN teacher t ON c.teacher_id = t.id;

注意，这里的子查询 `SELECT * FROM class WHERE id = 1` 返回的结果只有一行，因为我们指定了 `id = 1`，所以外层的 `LEFT OUTER JOIN` 只会返回这个班级的所有学生和对应的老师信息。