如何使用更新插入新的 xml 元素并替换为 SQL Server Management Studio

Question

我有这个 XML:

<qrcode xmlns="http://vital.nl/qrcodeSchema.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <Echeq>
    <echeqFamilyId>67c8590e-66fe-43e1-9124-a2163a6365df</echeqFamilyId>
  </Echeq>
</qrcode>

但我想得到这个：

<qrcode xmlns="http://vital.nl/qrcodeSchema.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <Echeq>
 <awardedVPoints>0</awardedVPoints>
    <echeqFamilyId>67c8590e-66fe-43e1-9124-a2163a6365df</echeqFamilyId>
  </Echeq>
</qrcode>

我试着得到这样的结果：

UPDATE[dbo].[QRCodeDefinitions]     
SET[QRCodeXml] = CAST(REPLACE(CAST([QRCodeXml] as nvarchar(max)), '',  '<awardedVPoints>0') AS xml) 
FROM [dbo].[QRCodeDefinitions] 
WHERE qrcode = 'newvcheq'

但是 xml.

中没有任何变化

那么我必须改变什么？

谢谢

好的，所以我尝试了这个：

;WITH XMLNAMESPACES(N'http://vital10.nl/qrcodeSchema.xsd' AS ns)
UPDATE [dbo].[QRCodeDefinitions]
SET QRCodeXml = QRCodeXml.query('
    declare default element namespace "http://vital.nl/qrcodeSchema.xsd";
    <qrcode xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema">
    {
        for $x in ns:/qrcode/*
        return (
          if (empty($x/../awardedVPoints)) then (<awardedVPoints> {"0"}</awardedVPoints>)
          else (), $x)
    }
    </qrcode>')
FROM [dbo].[QRCodeDefinitions]
WHERE qrcode = 'newvcheq'

但后来我明白了：

Msg 9332, Level 16, State 1, Line 38
XQuery [dbo.QRCodeDefinitions.QRCodeXml.query()]: Syntax error near ':', expected 'where', '(stable) order by' or 'return'.

如果我这样做：

UPDATE [dbo].[QRCodeDefinitions]
SET [QRCodeXml] = [QRCodeXml].query('
declare default element namespace "http://vital.nl/qrcodeSchema.xsd";
<qrcode xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns:xsd="http://www.w3.org/2001/XMLSchema">
{
    for $x in /qrcode/*
    return (
        if (empty($x/../awardedVPoints)) then (<awardedVPoints> {"0"}</awardedVPoints>)
        else (), $x)
}
</qrcode>')
FROM [dbo].[QRCodeDefinitions]
WHERE qrcode = 'newvcheq'

然后我得到这个错误：

XML Validation: Invalid content. Expected element(s): '{http://vital.nl/qrcodeSchema.xsd}ExternalUrl','{http://vital.nl/qrcodeSchema.xsd}Platform','{http://vital.nl/qrcodeSchema.xsd}Image','{http://vital10.nl/qrcodeSchema.xsd}Location','{http://vital.nl/qrcodeSchema.xsd}Echeq','{http://vital.nl/qrcodeSchema.xsd}Video'. Found: element '{http://vital10.nl/qrcodeSchema.xsd}awardedVPoints' instead. Location: /:qrcode[1]/:awardedVPoints[1].

那么我必须改变什么？谢谢

Table设计。所以这就是table的细节了。所有 table 字段

CREATE TABLE [dbo].[QRCodeDefinitions]
(
    [QRCode] [nvarchar](256) NOT NULL,
    [Title] [nvarchar](256) NOT NULL,
    [Description] [nvarchar](max) NOT NULL,
    [CreatedBy] [uniqueidentifier] NOT NULL,
    [CreatedOn] [datetime2](7) NOT NULL,
    [UpdatedOn] [datetime2](7) NOT NULL,
    [ValidUntil] [datetime2](7) NOT NULL,
    [LastScannedOn] [datetime2](7) NULL,
    [TotalScanned] [bigint] NOT NULL,
    [MaxAllowedToScan] [bigint] NULL,
    [MaxAllowedToScanByParticipant] [bigint] NULL,
    [ScanFrequency] [bigint] NULL,
    [ScanFrequencyType] [int] NOT NULL,
    [ActionType] [int] NOT NULL,
    [QRCodeXml] [xml](CONTENT [dbo].[QRCodeSchema-2019-07-23]) NULL,
    [PublishState] [int] NOT NULL,
 CONSTRAINT [PK_QRCodeDefinitions] PRIMARY KEY CLUSTERED 
(
    [QRCode] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]
GO

ALTER TABLE [dbo].[QRCodeDefinitions] ADD  DEFAULT ((0)) FOR [PublishState]
GO

所以这必须是正确答案：

UPDATE [dbo].[QRCodeDefinitions]
SET QRCodeXml = QRCodeXml.query('
declare default element namespace "http://vital10.nl/qrcodeSchema.xsd";
<qrcode xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns:xsd="http://www.w3.org/2001/XMLSchema">
{
    for $x in /qrcode/*
    return (
        if (empty($x/../awardedVPoints)) then (<awardedVPoints>{"0"}</awardedVPoints>)
        else (), $x)
}
</qrcode>')
FROM[dbo].[QRCodeDefinitions]
WHERE qrcode = 'newvcheq';

Answer 1

请尝试以下解决方案。它使用 XQuery 及其 FLWOR 表达式。

SQL

-- DDL and sample data population, start
DECLARE @tbl TABLE (ID INT IDENTITY PRIMARY KEY, QRCodeXml XML, qrcode NVARCHAR(256));
INSERT INTO @tbl (QRCodeXml, qrcode) VALUES
(N'<?xml version="1.0"?>
<qrcode xmlns="http://vital.nl/qrcodeSchema.xsd"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns:xsd="http://www.w3.org/2001/XMLSchema">
    <Echeq>
        <echeqFamilyId>67c8590e-66fe-43e1-9124-a2163a6365df</echeqFamilyId>
    </Echeq>
</qrcode>', 'newvcheq');
-- DDL and sample data population, end

-- before
SELECT * FROM @tbl;

UPDATE @tbl
SET QRCodeXml = QRCodeXml.query('
declare default element namespace "http://vital.nl/qrcodeSchema.xsd";
<qrcode xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns:xsd="http://www.w3.org/2001/XMLSchema">
{
    for $x in /qrcode/Echeq
    return <Echeq>
    {
        if (empty($x/awardedVPoints)) then
            (element awardedVPoints {"0"}, $x/*)
        else $x/*
    }
    </Echeq>
}
</qrcode>')
FROM @tbl
WHERE qrcode = 'newvcheq';

-- after
SELECT * FROM @tbl;

Output

<qrcode xmlns="http://vital.nl/qrcodeSchema.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <Echeq>
    <awardedVPoints>0</awardedVPoints>
    <echeqFamilyId>67c8590e-66fe-43e1-9124-a2163a6365df</echeqFamilyId>
  </Echeq>
</qrcode>

如何使用更新插入新的 xml 元素并替换为 SQL Server Management Studio

How to insert a new xml element with update and replace with SQL Server Manangement Studio

xml

tsql

sql-server

xsd

xquery