視圖的SELECT包含FROM子句中的子查詢MySQL語句

Question

我有關於在MySQL工作臺中創建視圖的查詢。我有錯誤：保存時，「視圖的SELECT包含FROM子句中的子查詢」。

這是我發言的副本：

CREATE VIEW viewMorningReport AS 
select z.AllocationDate, z.LocationName, z.StationName, a.00000100, b.01000200, c.02000300 from 
(SELECT DISTINCT AllocationDate, LocationName, StationName FROM satsschema.employeeslot 
where LocationName = 'T2 PML' 
and StationName is not null) z 
left outer join 
(SELECT AllocationDate, LocationName, StationName, EmpName AS '00000100' FROM  satsschema.employeeslot 
WHERE Assigned = true 
and (EmpTime = '00:00:00' && EmpTime < '01:00:00')) a 
on z.LocationName = a.LocationName and z.StationName = a.StationName 
left outer join 
(SELECT AllocationDate, LocationName, StationName, EmpName AS '01000200' FROM satsschema.employeeslot 
WHERE Assigned = true 
and (EmpTime = '01:00:00' && EmpTime < '02:00:00')) b 
on a.LocationName = b.LocationName and a.StationName = b.StationName 
left outer join 
(SELECT AllocationDate, LocationName, StationName, EmpName AS '02000300' FROM satsschema.employeeslot 
WHERE Assigned = true 
and (EmpTime = '02:00:00' && EmpTime < '03:00:00')) c 
on b.LocationName = c.LocationName and b.StationName = c.StationName 

任何想法，在哪裏呢？

Answer 1

由於the official documentation says

E.4. Restrictions on Views

(..)

Subqueries cannot be used in the FROM clause of a view.

一種選擇，可以創建每個子查詢視圖。 再一個，就是改變你的看法，以避免subquerys的from子句中

Answer 2

你可以創建視圖的子查詢，並呼籲他的主要觀點