Question

我试图将Item.ItemLookupCode更新为

的组合

ItemClass.ItemLookupCode + 
MatrixAttributeDisplayOrder.Code(Dimension 1) + 
MatrixAttributeDisplayOrder.Code(Dimension 2) + 
MatrixAttributeDisplayOrder.Code(Dimension 3)

哪会返回Item.ItemLookupCode = F06555SND36LG

使用下表。非常感谢任何帮助，谢谢：

db.Item：

   ID | ItemLookupCode
-----------------------
68883 | 4344110101

db.ItemClassComponent：

ID    |ItemClassID | ItemID | Detail1 | Detail2 | Detail3
----------------------------------------------------------    
68883 | 2566       | 68905  | Sand    | 36      | Long

db.MatrixAttributeDisplayOrder：

ID    | ItemClassID | Dimension | Attribute | Code
---------------------------------------------------    
19769 | 2566        | 2         | 36        | 36
19774 | 2566        | 3         | Long      | LG
47708 | 2566        | 1         | Sand      | Snd
 1200 |   88        | 1         | 32 Short  | 32S
 4272 |  366        | 3         | Long      | LNG
 3207 |  266        | 3         | Short     | SH
19767 | 2566        | 1         | Navy      | NVY
19768 | 2566        | 2         | 34        | 34
19772 | 2566        | 3         | Short     | SH

db.ItemClass：

ID   | ItemLookupCode
----------------------    
2566 | F06555

Answer 1

此查询应该执行您想要的操作，如果要对其进行测试，您可以单独运行select查询以返回返回的值。使用SQL 2012及更高版本，您可以使用concat()将值合并到一个字符串中，如果您将较低版本更改为现在已注释掉的行。

update Item
set ItemLookupCode = LookupCodes.ItemLookupCode
from Item i 
inner join 
(
  select 
    icc.id, 
    -- SQL 2012+
    ItemLookupCode = upper(concat(ic.ItemLookupCode, m1.code, m2.code, m3.code))
    -- pre SQL 2012 
    -- ItemLookupCode = upper(ic.ItemLookupCode + m1.code + m2.code + m3.code)  
  from ItemClassComponent icc
  inner join MatrixAttributeDisplayOrder m1 
    on icc.ItemClassID = m1.ItemClassID and m1.Dimension = 1
  inner join MatrixAttributeDisplayOrder m2 
    on icc.ItemClassID = m2.ItemClassID and m2.Dimension = 2
  inner join MatrixAttributeDisplayOrder m3 
    on icc.ItemClassID = m3.ItemClassID and m3.Dimension = 3
  inner join ItemClass ic 
    on icc.ItemClassID = ic.ID
) LookupCodes on LookupCodes.ID = i.ID
where i.ID = 68883;

Sample SQL Fiddle

另一个版本的查询包含了评论中提出的其他要求：

select 
    icc.id, 
    -- SQL 2012+
    ItemLookupCode = upper(concat(ic.ItemLookupCode, m1.code, m2.code, m3.code))
    -- pre SQL 2012 
    -- ItemLookupCode = upper(ic.ItemLookupCode + m1.code + m2.code + m3.code)  
from ItemClassComponent icc
inner join MatrixAttributeDisplayOrder m1 
     on icc.ItemClassID = m1.ItemClassID 
    and icc.Detail1 = m1.Attribute 
    and m1.Dimension = 1
inner join MatrixAttributeDisplayOrder m2 
     on icc.ItemClassID = m2.ItemClassID 
    and icc.Detail2 = m2.Attribute
    and m2.Dimension = 2     
inner join MatrixAttributeDisplayOrder m3 
     on icc.ItemClassID = m3.ItemClassID 
    and icc.Detail3 = m3.Attribute 
    and m3.Dimension = 3
inner join ItemClass ic 
     on icc.ItemClassID = ic.ID

Answer 2

我不确定您想要连接哪些字段，但这里是代码字段。它将整个表作为一组来完成。

UPDATE item SET ItemLookupCode = Result
FROM Item INNER JOIN (
SELECT icc.id, CONCAT(ic.ItemLookupCode, M1.Code1, m2.Code2,m3.Code3) AS Result
FROM ItemClassComponent icc
LEFT OUTER JOIN ItemClass ic on icc.ItemClassID = ic.ID
CROSS APPLY (SELECT Code AS Code1 FROM MatrixAttributeDisplayOrder D1 WHERE D1.ItemClassID = icc.ItemClassID  AND D1.Dimension = 1 ) M1
CROSS APPLY (SELECT Code AS Code2 FROM MatrixAttributeDisplayOrder D1 WHERE D1.ItemClassID = icc.ItemClassID  AND D1.Dimension = 2 ) M2
CROSS APPLY (SELECT Code AS Code3 FROM MatrixAttributeDisplayOrder D1 WHERE D1.ItemClassID = icc.ItemClassID  AND D1.Dimension = 3 ) M3
) T1 ON item.ID = t1.ID

更新单个字段以包含来自不同表的4列

2 个答案: