Transact SQL XQuery XML Query - PullRequest
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Transact SQL XQuery XML Query

3 голосов
/ 07 октября 2011 
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-%')

Я пробовал различные версии этого, включая WHERE ProductDetails.value, но снова я могу вернуть некоторые узлы, но не все.

Я пытаюсь создать запрос на обновление, который удаляет числа из Image-I-Хотит-.gif.

т.е. 

 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

и т. Д. И т. Д.

Но я даже не могу заставить его выбрать все необходимые изображения, не говоря уже об их обновлении.Это синтаксис xQuery, который я не могу понять правильно, и я не могу найти хороший пример, поскольку все, что я пытаюсь, до сих пор ошибалось.

Я мог бы написать это на c # или какой-то другой эквивалент, но я действительно хотел бы знать, как это сделатьв Transact-Sql с использованием xQuery без использования цикла, если это возможно, и т. д., как простой запрос на обновление.

1 Ответ

5 голосов
/ 07 октября 2011

Запрос: 

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

Обновление: 

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
...