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我正在尝试解析一个 XML 节点数组，这是一个转换为 XML 的 nvarchar(max) 列，我已经使用谷歌搜索并搜索了 stackoverflow，但我没有找到任何可以帮助我解决这个问题的示例。

我所拥有的是一个存储为 nvarchar(max) 的 XML 值，格式如下：

<?xml version="1.0" encoding="utf-16"?>
<ArrayOfCmnStatusRuleOverride xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <cmnStatusRuleOverride xsi:type="cmnCoveredByOverride">
        <Start>2020-05-28T17:00:00</Start>
        <End>2020-05-29T07:00:00</End>
        <SuspendExpiration>0001-01-01T00:00:00</SuspendExpiration>
        <subID>103</subID>
        <listID>4016</listID>
        <Description>Jane Doe</Description>
    </cmnStatusRuleOverride>
    <cmnStatusRuleOverride xsi:type="cmnCoveredByOverride">
        <Start>2020-05-26T17:00:00</Start>
        <End>2020-05-28T07:00:00</End>
        <SuspendExpiration>0001-01-01T00:00:00</SuspendExpiration>
        <subID>103</subID>
        <listID>4014</listID>
        <Description>Joe Blow</Description>
    </cmnStatusRuleOverride>
    <cmnStatusRuleOverride xsi:type="cmnCoveredByOverride">
        <Start>2020-05-25T17:00:00</Start>
        <End>2020-05-26T07:00:00</End>
        <SuspendExpiration>0001-01-01T00:00:00</SuspendExpiration>
        <subID>103</subID>
        <listID>4016</listID>
        <Description>Jane Doe</Description>
    </cmnStatusRuleOverride>
</ArrayOfCmnStatusRuleOverride>

我正在使用以下 SQL 来解析内容，这与我需要的很接近，但是交叉应用导致我出现问题

declare @Status xml, @Override nvarchar(100),@ORStart nvarchar(50), @OREnd nvarchar(50)
set @Status = 
(select b.Overrides from Database.dbo.Descriptions as a
inner join Database.dbo.Listings as b on a.listID = b.listId
inner join Database.dbo.Clients as c on b.subId = c.subId and cast(c.ClientNumber as nvarchar) = '2195956693'
--cross apply @Status.nodes('/ArrayOfCmnStatusRuleOverride/cmnStatusRuleOverride/Description') as T(Loc)
where a.Description = 'Jack Sprat')

select T.OVR.query('.') 'Override'--, T1.STT.query('.') 'Start'--, T2.ENND.query('.') 'End'
from Database.dbo.Descriptions as a
inner join Database.dbo.Listings as b on a.listID = b.listId
inner join Database.dbo.Clients as c on b.subId = c.subId and cast(c.ClientNumber as nvarchar) = '9876543210'
cross apply @Status.nodes('/ArrayOfCmnStatusRuleOverride/cmnStatusRuleOverride/Description') as T(OVR)
--cross apply T.OVR.nodes('/ArrayOfCmnStatusRuleOverride/cmnStatusRuleOverride/Start') as T1(STT)
--cross apply T.OVR.nodes('/ArrayOfCmnStatusRuleOverride/cmnStatusRuleOverride/End') as T2(ENND)
where a.Description = 'Jack Sprat'

注释掉第二个和第三个 xml 查询后，我得到了 3 个结果，正如我所料。

  1. 简·多伊
  2. 乔吹
  3. 简·多伊

如果我取消注释第二个查询，那么我会得到 9 个结果，如下所示

    Override        Start
  1. 简·多伊 2020-05-28T17:00:00
  2. 简·多伊 2020-05-26T17:00:00
  3. 简·多伊 2020-05-25T17:00:00
  4. 乔吹 2020-05-28T17:00:00
  5. 乔吹 2020-05-26T17:00:00
  6. 乔吹 2020-05-25T17:00:00
  7. 简·多伊 2020-05-28T17:00:00
  8. 简·多伊 2020-05-26T17:00:00
  9. 简·多伊 2020-05-25T17:00:00

当然，如果我取消注释第三个查询，我会得到 27 行。关于我做错了什么的任何提示？从昨天早上开始，我就一直在研究这个问题，试图弄清楚这一点，而且如此接近，但又如此遥远。

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1 回答 1

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弄清楚了。

select T.OVR.query('./Description') 'Override', 
T.OVR.query('./Start') 'Start', 
T.OVR.query('./End') 'End'
from Database.dbo.Descriptions as a
inner join Database.dbo.Listings as b on a.listID = b.listId
inner join Database.dbo.Clients as c on b.subId = c.subId and cast(c.ClientNumber as nvarchar) = '9876543210'
cross apply @Status.nodes('/ArrayOfCmnStatusRuleOverride/cmnStatusRuleOverride') as T(OVR)
where a.Description = 'Jack Sprat'
于 2020-05-27T19:38:57.183 回答