在随后创建视图，我得到一个错误来自视野错误条款

create or replace view viewfee as 
    select unique_id,session,course_cat,course,class,rollno, sum(adm_due) as adm_due, sum(tuition_due) as tuition_due, sum(exam_due) as exam_due from 
    (
    select unique_id,session,course_cat,course,class,rollno,null as adm_due, null as tuition_due, null as exam_due from tbstdinfo 
    union all 
    select unique_id,null,null,null,null,null,(adm_tot - sum(adm_payment)) AS adm_due, null, null from tbfeeadmission group by unique_id 
    union all 
    select unique_id,null,null,null,null,null,null, (tuition_tot - sum(tuition_payment)) AS tuition_due, null from tbfeetuition group by unique_id 
    union all 
    select unique_id,null,null,null,null,null,null, null, (exam_tot - sum(exam_payment)) AS exam_due from tbfeeexam group by unique_id 
    )x 
    group by unique_id

，但如果我不视图执行查询，它工作正常

select unique_id,session,course_cat,course,class,rollno, sum(adm_due) as adm_due, sum(tuition_due) as tuition_due, sum(exam_due) as exam_due from 
(
select unique_id,session,course_cat,course,class,rollno,null as adm_due, null as tuition_due, null as exam_due from tbstdinfo 
union all 
select unique_id,null,null,null,null,null,(adm_tot - sum(adm_payment)) AS adm_due, null, null from tbfeeadmission group by unique_id 
union all 
select unique_id,null,null,null,null,null,null, (tuition_tot - sum(tuition_payment)) AS tuition_due, null from tbfeetuition group by unique_id 
union all 
select unique_id,null,null,null,null,null,null, null, (exam_tot - sum(exam_payment)) AS exam_due from tbfeeexam group by unique_id 
)x 
group by unique_id

其实我需要做四个结合表格以在单个表格中获取所有需要的记录。请帮忙

来源

2016-03-17 Subimal Sinha

发布错误讯息 –

＃1349 - 视图的SELECT包含FROM子句中的子查询 –

创建视图无法从中找到子查询。看看这个解决方法：http://stackoverflow.com/questions/8428641/views-select-contains-a-subquery-in-the-from-clause –

在MySQL 5.7.7之前，SELECT语句不能在的FROM子句中包含子查询。

参考：

http://dev.mysql.com/doc/refman/5.7/en/create-view.html

来源

2016-03-17 07:45:11

你不能在视图定义子选择，但是你可以做这样的事情：

create or replace view intermediate_view as 
select unique_id,session,course_cat,course,class,rollno,null as adm_due, null as tuition_due, null as exam_due from tbstdinfo 
union all 
select unique_id,null,null,null,null,null,(adm_tot - sum(adm_payment)) AS adm_due, null, null from tbfeeadmission group by unique_id 
union all 
select unique_id,null,null,null,null,null,null, (tuition_tot - sum(tuition_payment)) AS tuition_due, null from tbfeetuition group by unique_id 
union all 
select unique_id,null,null,null,null,null,null, null, (exam_tot - sum(exam_payment)) AS exam_due from tbfeeexam group by unique_id

然后

create or replace view viewfee as 
select unique_id,session,course_cat,course,class,rollno, sum(adm_due) as adm_due, sum(tuition_due) as tuition_due, sum(exam_due) as exam_due from intermediate_view 
group by unique_id

为一个workaro und

来源

2016-03-17 08:15:11 piotrgajow

我已经这样做了，但我想在一个单一的观点，无论如何谢谢 –

来自视野错误条款

回答

参考：

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