MSSQL查詢XML差異爲了

我的數據庫需要存儲的XML請求時，用戶發送以及XML有2個通信元件，WP和SA，但他們沒有固定的（我的意思是位置）：MSSQL查詢XML差異爲了

<bms:OrgInfo> 
     <bms:Communications> 
     <bms:CommQualifier>WP</bms:CommQualifier> 
     <bms:CommPhone>5555551212</bms:CommPhone> 
     </bms:Communications> 
     <bms:Communications> 
     <bms:CommQualifier>SA</bms:CommQualifier> 
     <bms:Address> 
      <bms:Address1>1234 Test Avenue</bms:Address1> 
      <bms:Address2>1234 Test Avenue</bms:Address2> 
      <bms:City>Alamogordo</bms:City> 
      <bms:StateProvince>NM</bms:StateProvince> 
      <bms:PostalCode>88310</bms:PostalCode> 
      <bms:CountryCode>US</bms:CountryCode> 
     </bms:Address> 
     </bms:Communications> 
    </bms:OrgInfo>

有時候SA元素將是第一個。

如何查詢它不用擔心poistion

這裏是我當前的查詢，我使用的索引進行查詢：

IF EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[XmlStore]') AND type in (N'U')) 
DROP TABLE [dbo].[XmlStore] 
GO 

CREATE TABLE [dbo].[XmlStore](
    [XmlRequest] [xml] NULL 
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY] 

INSERT INTO [XmlStore]([XmlRequest]) VALUES('<?xml version="1.0" encoding="UTF-8"?> 
    <bms:OrgInfo xmlns:bms="http://example.org"> 
     <bms:Communications> 
     <bms:CommQualifier>WP</bms:CommQualifier> 
     </bms:Communications> 
     <bms:Communications> 
     <bms:CommQualifier>SA</bms:CommQualifier> 
     </bms:Communications> 
     <bms:Communications> 
     <bms:CommQualifier>EM</bms:CommQualifier> 
     </bms:Communications> 
    </bms:OrgInfo>') 


;WITH xmlnamespaces ('http://example.org' AS bms) 
Select 
    t.XmlRequest.value('(/bms:OrgInfo/bms:Communications/bms:CommQualifier)[1]', 'nvarchar(100)') as WP_Value, 
    t.XmlRequest.value('(/bms:OrgInfo/bms:Communications/bms:CommQualifier)[2]', 'nvarchar(100)') as SA_Value, 
    t.XmlRequest.value('(/bms:OrgInfo/bms:Communications/bms:CommQualifier)[3]', 'nvarchar(100)') as EM_Value 
FROM [XmlStore] AS t  

DROP TABLE [dbo].[XmlStore]

這將是一個災難，如果用戶重新排序通訊元素！

來源

2017-06-23 Ngài Jin

我們可以看到你的腳本嗎？ – maSTAShuFu

@maSTAShuFu：是的，我編輯帖子更新腳本 –

您可以添加XQuery predicate喜歡這裏

IF EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[XmlStore]') AND type in (N'U')) 
DROP TABLE [dbo].[XmlStore] 
GO 

CREATE TABLE [dbo].[XmlStore](
    [XmlRequest] [xml] NULL 
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY] 

INSERT INTO [XmlStore]([XmlRequest]) VALUES('<?xml version="1.0" encoding="UTF-8"?> 
    <bms:OrgInfo xmlns:bms="http://example.org"> 
     <bms:Communications> 
     <bms:CommQualifier>WP</bms:CommQualifier> 
     </bms:Communications> 
     <bms:Communications> 
     <bms:CommQualifier>SA</bms:CommQualifier> 
     </bms:Communications> 
     <bms:Communications> 
     <bms:CommQualifier>EM</bms:CommQualifier> 
     </bms:Communications> 
    </bms:OrgInfo>')

--The XML一次，但以不同的順序

INSERT INTO [XmlStore]([XmlRequest]) VALUES('<?xml version="1.0" encoding="UTF-8"?> 
    <bms:OrgInfo xmlns:bms="http://example.org"> 
     <bms:Communications> 
     <bms:CommQualifier>SA</bms:CommQualifier> 
     </bms:Communications> 
     <bms:Communications> 
     <bms:CommQualifier>EM</bms:CommQualifier> 
     </bms:Communications> 
     <bms:Communications> 
     <bms:CommQualifier>WP</bms:CommQualifier> 
     </bms:Communications> 
    </bms:OrgInfo>')

--The查詢（所有指標均[1]）

;WITH xmlnamespaces ('http://example.org' AS bms) 
Select 
    t.XmlRequest.value('(/bms:OrgInfo/bms:Communications[bms:CommQualifier="WP"]/bms:CommQualifier)[1]', 'nvarchar(100)') as WP_Value, 
    t.XmlRequest.value('(/bms:OrgInfo/bms:Communications[bms:CommQualifier="SA"]/bms:CommQualifier)[1]', 'nvarchar(100)') as SA_Value, 
    t.XmlRequest.value('(/bms:OrgInfo/bms:Communications[bms:CommQualifier="EM"]/bms:CommQualifier)[1]', 'nvarchar(100)') as EM_Value 
FROM [XmlStore] AS t  

DROP TABLE [dbo].[XmlStore]

來源

2017-06-23 06:17:00 Shnugo

謝謝，它的工作 –

MSSQL查詢XML差異爲了

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