Transact SQL XQuery XML查询

DECLARE @tProduct TABLE (
    [pProductId] [smallint] IDENTITY(1,1) PRIMARY KEY NOT NULl, 
    [ProductDetails] [xml] NOT NULL 
) 

    INSERT @tProduct 
    ([ProductDetails]) 
    VALUES 
    (N'<product> 
     <placeholder name="ProductHeader"><control name="pdRequiredMainHeading"><text position="placeholder1">Blah blah</text></control></placeholder> 
     <placeholder name="LeftColumn"> 
      <control name="pdRequiredSubHeading"><text position="placeholder1">Blah blah</text><text position="placeholder2">Blah blah</text></control> 
      <control name="pdRequiredParagraph"><text position="placeholder1">Blah blah</text></control> 
      <control name="pdOverlinedUnderlinedHeading"><text position="placeholder1">Blah blah</text></control> 
      <control name="pdParagraph"><text position="placeholder1">Blah blah</text></control> 
      </placeholder> 
      <placeholder name="RightColumn"> 
       <control name="pdRequiredMediumImage"><image position="placeholder1" alt="Blah blah">Blahblah.gif</image></control> 
       <control name="pdMediumImage"><image position="placeholder1" alt="">BlahBlah2.gif</image></control> 
       <control name="pdRoundedBorderHeadingUnorderedList"><text position="placeholder1">Blah blah</text><ul position="placeholder2"><li>Blah blah</li></ul></control> 
       <control name="pdMediumImage"><image position="placeholder1" alt="">The-Image-I-Want-1.gif</image></control> 
      </placeholder> 
     </product>') 

    INSERT @tProduct 
    ([ProductDetails]) 
    VALUES 
    (N'<product> 
     <placeholder name="ProductHeader"><control name="pdRequiredMainHeading"><text position="placeholder1">Blah blah</text></control></placeholder> 
     <placeholder name="LeftColumn"> 
      <control name="pdRequiredSubHeading"><text position="placeholder1">Blah blah</text><text position="placeholder2">Blah blah</text></control> 
      <control name="pdRequiredParagraph"><text position="placeholder1">Blah blah</text></control> 
      <control name="pdOverlinedUnderlinedHeading"><text position="placeholder1">Blah blah</text></control> 
      <control name="pdParagraph"><text position="placeholder1">Blah blah</text></control> 
     </placeholder> 
     <placeholder name="RightColumn"> 
      <control name="pdRequiredMediumImage"><image position="placeholder1" alt="Blah blah">Blahblah.gif</image></control> 
      <control name="pdRoundedBorderHeading"><text position="placeholder1">Blah blah</text><ul position="placeholder2"><li>Blah blah</li></ul></control> 
      <control name="pdMediumImage"><image position="placeholder1" alt="">The-Image-I-Want-12.gif</image></control> 
     </placeholder> 
     </product>') 

    INSERT @tProduct 
    ([ProductDetails]) 
    VALUES 
    (N'<product> 
     <placeholder name="ProductHeader"><control name="pdRequiredMainHeading"><text position="placeholder1">Blah blah</text></control></placeholder> 
     <placeholder name="LeftColumn"> 
      <control name="pdRequiredSubHeading"><text position="placeholder1">Blah blah</text><text position="placeholder2">Blah blah</text></control> 
      <control name="pdRequiredParagraph"><text position="placeholder1">Blah blah</text></control> 
      <control name="pdOverlinedUnderlinedHeading"><text position="placeholder1">Blah blah</text></control> 
      <control name="pdParagraph"><text position="placeholder1">Blah blah</text></control> 
     </placeholder> 
     <placeholder name="RightColumn"> 
      <control name="pdRequiredMediumImage"><image position="placeholder1" alt="">The-Image-I-Want-1.gif123.gif</image></control> 
      <control name="pdRoundedBorderHeadingUnorderedList"><text position="placeholder1">Blah blah</text><ul position="placeholder2"><li>Blah blah</li></ul></control> 
      <control name="pdMediumImage"><image position="placeholder1" alt="Blah blah">Blahblah.gif</image></control> 
     </placeholder> 
     </product>') 

    INSERT @tProduct 
    ([ProductDetails]) 
    VALUES 
    (N'<product> 
     <placeholder name="ProductHeader"><control name="pdRequiredMainHeading"><text position="placeholder1">Blah blah</text></control></placeholder> 
     <placeholder name="LeftColumn"> 
      <control name="pdRequiredSubHeading"><text position="placeholder1">Blah blah</text><text position="placeholder2">Blah blah</text></control> 
      <control name="pdRequiredParagraph"><text position="placeholder1">Blah blah</text></control> 
      <control name="pdOverlinedUnderlinedHeading"><text position="placeholder1">Blah blah</text></control> 
      <control name="pdParagraph"><text position="placeholder1">Blah blah</text></control> 
     </placeholder> 
     <placeholder name="RightColumn"> 
      <control name="pdRequiredMediumImage"><image position="placeholder1" alt="">The-Image-I-Want-1.gif1234.gif</image></control> 
      <control name="pdRoundedBorder"><text position="placeholder1">Blah blah</text><ul position="placeholder2"><li>Blah blah</li></ul></control> 
      <control name="pdMediumImage"><image position="placeholder1" alt="Blah blah">Blahblah.gif</image></control> 
     </placeholder> 
     </product>') 

    -- ITS AN UPDATE I WANT BUT EVEN THIS I CANT GET TO WORK AS IT DOESNT BRING BACK EVERY IMAGE 

    SELECT pProductId, ProductDetails 
    FROM @tProduct 
    WHERE (ProductDetails.nodes('(//product/placeholder/control/image)') LIKE 'The-Image-I-Want-%')

我试过了包括WHERE ProductDetails.value在内的各种版本，但是我又可以带回一些节点但不是全部。Transact SQL XQuery XML查询

我试着创建一个更新查询，从Image-I-Want-.gif中删除数字。

即

Image-I-Want-1.gif becomes Image-I-Want-.gif 

Image-I-Want-12.gif becomes Image-I-Want-.gif 

Image-I-Want-123.gif becomes Image-I-Want-.gif

等等等等

但我甚至不能让它选择所有需要的图像更不用说对其进行更新。它的xQuery语法不能完全正确，我也不能找到一个很好的示例，因为我尝试的所有内容都出现了错误。

我可以在c＃或一些等价的脚本，但我真的很想知道如何在Transact-Sql中使用xQuery而不使用循环，如果可能的话，就像一个简单的更新查询。

来源

2011-10-07 William Humphreys

查询：

select pProductId, ProductDetails 
from @tProduct 
where ProductDetails.exist('/product/placeholder/control/image[contains(., "The-Image-I-Want-")]') = 1

更新：

update @tProduct 
set ProductDetails.modify('replace value of (/product/placeholder/control/image[contains(., "The-Image-I-Want-")]/text())[1] with "The-Image-I-Want-.gif"') 
where ProductDetails.exist('/product/placeholder/control/image[contains(., "The-Image-I-Want-")]') = 1

来源

2011-10-07 05:34:45

非常好，谢谢你，是对现货:-) –

Transact SQL XQuery XML查询

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