模擬聯合使索引視圖

Question

我已經在SQL Server 2005中有下面的表模式，我想將它非規範化到一個索引視圖，我正在寫的一些查詢，直到我可以使結構更改永久。

的表是如下

Writing 
(
DocumentSerial int 
Grader1_ID int 
Grade_1 int 
Grader2_ID int 
Grade_2 int 
Grader3_ID int 
Grade_3 int 
) 

Users 
(userID int, 
firstname, 
lastname 
) 

我想與一個單獨的行，每個分級器/級/文件組合，其中平地機或者是分級機1，平地機2，或分級機3

一個表我寫的視圖使用UNION，因此它不會指數：

select documentSerial,grader1_id as grader_id, grade_1 as grade ,1 as sequence 
from Writing w inner join User U on w.grader1_id=u.userid 
UNION 
select documentSerial,grader2_id as grader_id, grade_2 as grade ,2 as sequence 
from Writing w inner join User U on w.grader2_id=u.userid 
UNION 
select documentSerial,grade31_id as grader_id, grade_3 as grade ,3 as sequence 
from Writing w inner join User U on w.grader3_id=u.userid 

問題是 - SQL不能索引與工會的看法...

Answer 1

爲什麼它必須是一個索引視圖時，你可以使用一個適當的表：

SELECT x.* 
    INTO normalized_table 
    FROM (select documentSerial,grader1_id as grader_id, grade_1 as grade ,1 as sequence 
      from Writing w 
      join User U on w.grader1_id = u.userid 
     UNION ALL 
     select documentSerial,grader2_id as grader_id, grade_2 as grade ,2 as sequence 
      from Writing w 
      join User U on w.grader2_id = u.userid 
     UNION ALL 
     select documentSerial,grade31_id as grader_id, grade_3 as grade ,3 as sequence 
      from Writing w 
      join User U on w.grader3_id = u.userid) x 

我明白，你可能要視圖，以便您不必同步數據的麻煩。唯一的另一種選擇是不索引視圖...