Question

我有一个名为VPX_EVENT_ARG的表，其中一列ARG_DATA包含XML值。

Table 1
+----------+-------------------+----------+
| EVENT_ID |     ARG_TYPE      | ARG_DATA |
+----------+-------------------+----------+
|  7121001 | vim.vm.ConfigSpec | XML1     |
|  7121002 | vim.vm.ConfigSpec | XML2     |
|  7121003 | vim.vm.ConfigSpec | XML3     |
+----------+-------------------+----------+

XML1，XML2和XML3是XML值。它们太长而无法输入表格。这是真正的价值观。实际上它们出现在一行中。

XML1，例如，

<obj xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="urn:vim25" versionId="5.5" xsi:type="VirtualMachineConfigSpec"><changeVersion>2015-09-24T10:02:53.866694Z</changeVersion><files><vmPathName>ds:///vmfs/volumes/54e5d10c-c527b7f3-7eea-a0d3c1f01404/CommVault VM Test/CommVault VM Test.vmx</vmPathName></files><deviceChange><operation>remove</operation><device xsi:type="VirtualDisk"><key>2003</key><deviceInfo><label>Hard disk 4</label><summary>20,971,520 KB </summary></deviceInfo><backing xsi:type="VirtualDiskFlatVer2BackingInfo"><fileName>ds:///vmfs/volumes/54e5d10c-c527b7f3-7eea-a0d3c1f01404/CommVault VM Test/CommVault VM Test_2.vmdk</fileName><diskMode>persistent</diskMode><split>false</split><writeThrough>false</writeThrough><thinProvisioned>false</thinProvisioned><uuid>6000C29b-e652-b5fe-76fa-18f6de988807</uuid><contentId>5bd085f0f9391346751e1e7efffffffe</contentId><digestEnabled>false</digestEnabled></backing><controllerKey>1000</controllerKey><unitNumber>3</unitNumber><capacityInKB>20971520</capacityInKB><shares><shares>1000</shares><level>normal</level></shares><storageIOAllocation><limit>-1</limit><shares><shares>1000</shares><level>normal</level></shares></storageIOAllocation></device></deviceChange></obj>

我会将XML1分成多行，以便更容易阅读。

<obj xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="urn:vim25" versionId="5.5" xsi:type="VirtualMachineConfigSpec"><changeVersion>2015-09-24T10:02:53.866694Z</changeVersion><files><vmPathName>ds:///vmfs/volumes/54e5d10c-c527b7f3-7eea-a0d3c1f01404/CommVault VM Test/CommVault VM Test.vmx</vmPathName></files>

<deviceChange>
    <operation>remove</operation>
    <device xsi:type="VirtualDisk">
        <key>2003</key>
        <deviceInfo>
            <label>Hard disk 4</label>
            <summary>20,971,520 KB </summary>
        </deviceInfo>
        <backing xsi:type="VirtualDiskFlatVer2BackingInfo">
        <fileName>ds:///vmfs/volumes/54e5d10c-c527b7f3-7eea-a0d3c1f01404/CommVault VM Test/CommVault VM Test_2.vmdk
        </fileName>
        <diskMode>persistent</diskMode>
        <split>false</split>
        <writeThrough>false</writeThrough>
        <thinProvisioned>false</thinProvisioned>
        <uuid>6000C29b-e652-b5fe-76fa-18f6de988807</uuid>
        <contentId>5bd085f0f9391346751e1e7efffffffe</contentId>
        <digestEnabled>false</digestEnabled>
    </backing>
    <controllerKey>1000</controllerKey>
    <unitNumber>3</unitNumber>
    <capacityInKB>20971520</capacityInKB>

    <shares><shares>1000</shares><level>normal</level></shares><storageIOAllocation><limit>-1</limit><shares><shares>1000</shares><level>normal</level></shares></storageIOAllocation>
    </device>
</deviceChange>
</obj>

我想使用MSSQL查询将XML1提取到表中。

DECLARE @xml XML
SET @xml = (SELECT ARG_DATA FROM VPX_EVENT_ARG WHERE ARG_ID = 1 AND EVENT_ID = 7121001); --EVENT_ID is fixed.
WITH XMLNAMESPACES('urn:vim25' AS NS)

SELECT
'diskUnit' = ref.value('./NS:device[1]/NS:unitNumber[1]', 'INT'),
'operation' = ref.value('./NS:operation[1]', 'NVARCHAR(100)'),
'newSizeKB' = ref.value('./NS:device[1]/NS:capacityInKB[1]', 'BIGINT')
FROM @xml.nodes('/NS:obj/NS:deviceChange') data(ref)

好吧，我得到了这个结果。

Table 2
+------+-----------+-----------+
| unit | operation | newSizeKB |
+------+-----------+-----------+
|    1 | edit      |  24117248 |
|    2 | edit      | 108003328 |
|    3 | add       |  20971520 |
+------+-----------+-----------+

您可以看到表2只是表1中第一行的结果。即使是第一行，第一行上的ARG_DATA也只是修复了EVENT_ID。我希望任何人都可以提供帮助。

问题1：我想在不修复EVENT_ID的情况下将多行XML值合并到一个表中，并将EVENT_ID也放入列中。请假设VPX_EVENT_ARG表包含数百行。

Table3
+----------+------+-----------+-----------+
| EVENT_ID | unit | operation | newSizeKB |
+----------+------+-----------+-----------+
|  7121001 |    1 | edit      |  24117248 |
|  7121001 |    2 | edit      | 108003328 |
|  7121001 |    3 | add       |  20971520 |
|  7121002 |    1 | edit      |   1048576 |
|  7121002 |    3 | edit      |  52428800 |
|  7121003 |    3 | edit      | 125829120 |
|  7121003 |    5 | remove    |  83886080 |
+----------+------+-----------+-----------+

问题2：有没有办法在不设置XML的情况下使用查询？我需要为查询设置XML，然后我可以使用nodes（）。

SET @xml = (SELECT ARG_DATA FROM VPX_EVENT_ARG WHERE ARG_ID = 1 AND EVENT_ID = 7121001);
.
.
FROM @xml.nodes('/NS:obj/NS:deviceChange') data(ref)

我想知道是否可以这样做。

FROM (SELECT ARG_DATA FROM VPX_EVENT_ARG WHERE ARG_ID = 1 AND EVENT_ID = 7121001).nodes('/NS:obj/NS:deviceChange') data(ref)

Error: Incorrect syntax near '.'. Expecting AS, ID, or QUOTED_ID.

我真的想用Table3这样的结果来加入我之前查询过的表。我很难处理XML，但坚持这么久。顺便说一下，我无法更新表格;这是受限制的。

Answer 1

当然，你可以。在节点上使用交叉应用：

;WITH XMLNAMESPACES('urn:vim25' AS NS)
SELECT
    v.EVENT_ID,
    'diskUnit' = ref.value('./NS:device[1]/NS:unitNumber[1]', 'INT'),
    'operation' = ref.value('./NS:operation[1]', 'NVARCHAR(100)'),
    'newSizeKB' = ref.value('./NS:device[1]/NS:capacityInKB[1]', 'BIGINT')
FROM VPX_EVENT_ARG AS v
CROSS APPLY v.ARG_DATA.nodes('/NS:obj/NS:deviceChange') data(ref)

如果您的列不是XML，我们需要一个子查询来转换它：

;WITH XMLNAMESPACES('urn:vim25' AS NS)
SELECT
v.EVENT_ID,
'diskUnit' = ref.value('./NS:device[1]/NS:unitNumber[1]', 'INT'),
'operation' = ref.value('./NS:operation[1]', 'NVARCHAR(100)'),
'newSizeKB' = ref.value('./NS:device[1]/NS:capacityInKB[1]', 'BIGINT')
FROM 
(
    SELECT
        c.EVENT_ID,
        c.ARG_TYPE,
        CONVERT(xml,c.ARG_DATA) AS ARG_DATA,
        c.ARG_ID
    FROM VPX_EVENT_ARG AS c
) AS v
CROSS APPLY v.ARG_DATA.nodes('/NS:obj/NS:deviceChange') data(ref)

将多行XML值和主键合并到一个SQL查询表中

1 个答案: