Mybatis初学-07

多对一数据查询

    
        
    

    
        select * from student
    

    
        select * from teacher where id = #{tid}
    



    
        select s.id sid, s.name sname, s.tid tid, t.name tname
        from student s, teacher t
        where s.tid = t.id
        order by sid asc
    

    
        
        
        
            
            
        
    

一堆多数据查询

 
        select  t.id tid, t.name tname, s.id sid, s.name sname
        from Student s, Teacher t
        where t.id = s.tid
        and t.id = #{id}
    

    
        
        
        
            
            
            
        

    



    
        
        
        
    

    
        select * from teacher t where id = #{id}
    

    
        select * from student where tid = #{tid}