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我正在尝试获取来自特定类别的产品的特定功能的价值。id_category_default 是 13（处理器），id_feature 是 6（Power(W) 我正在寻找的输出应该是这样的：

<ProcessorName><ValueOfFeature>

直到现在我已经尝试过这个：

 SELECT pl.name,fvl.value 

from ps_product_lang pl,ps_product p,ps_feature_value_lang fvl,ps_feature_value fv,ps_feature f,ps_feature_lang fl
where pl.id_product=p.id_product
and p.id_product in (SELECT id_product
             from ps_feature_product
             where id_feature in (select id_feature
                      from ps_feature
                      where id_feature = 6))
and pl.id_lang = 1
and pl.id_shop = 1
and p.id_shop_default=1
and p.id_category_default =13
and fvl.id_feature_value=fv.id_feature_value
and fv.id_feature=f.id_feature
and fvl.id_lang=1
and fl.id_feature =f.id_feature
and fl.id_lang=1
and f.id_feature=6

输出是这样的：

  <ProcessorName1><NameOfFeature><value 1 OfFeature>
  <ProcessorName1><NameOfFeature><value 2 OfFeature>
  <ProcessorName1><NameOfFeature><value 3 OfFeature>
  <ProcessorName1><NameOfFeature><value 4 OfFeature>

  <ProcessorName2><NameOfFeature><value 1 OfFeature>
  <ProcessorName2><NameOfFeature><value 2 OfFeature>
  <ProcessorName2><NameOfFeature><value 3 OfFeature>
  <ProcessorName2><NameOfFeature><value 4 OfFeature>

  <ProcessorName3><NameOfFeature><value 1 OfFeature1>
   etc
  <ProcessorName4><NameOfFeature><value 1 OfFeature1>
   etc

我需要的是为特定产品获取具有 id_feature=6 值的功能：

 <processorName1><valueOfFeature>
   <processorName2><valueOfFeature>
   <processorName3><valueOfFeature>
   <processorName4><valueOfFeature>

任何帮助将不胜感激！

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1 回答 1

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解决了我必须更多地查看数据库模式并设法编写正确的 sql 查询

于 2014-08-21T01:46:05.113 回答