从多个从属表删除行时出错

Question

错误：“ r”处或附近的语法错误 查询是： 从un_received_compansation_reason中删除r，ur，然后在receive_compensation_info.compensation_info_id = un_received_compansation_reason.compensation_info_id上加入receive_compensation_info r，其中tionment_info_id = 2

Answer 1

您需要在时间联接键中使用表别名，如下所示：

Delete r,ur from un_received_compansation_reason ur join 
received_compensation_info r on 
r.compensation_info_id = ur.compensation_info_id 
where ur.compensation_info_id=2

Answer 2

您具有特定的表别名，因此尝试将查询编写为：

Delete r, ur
    from un_received_compansation_reason ur join 
         received_compensation_info r 
         on r.compensation_info_id = ur.compensation_info_id 
where r.compensation_info_id = 2;