的Prestashop：MySQL查詢有關產品功能

Question

我需要得到的Prestashop 1.5產品的功能，但probleme是，我使用的是修改達讓我把多值一個特徵，每個產品

例如：

兼容的存儲卡： - 點菜備忘錄的xD - 記憶棒 - 記憶棒PRO - 多媒體卡（MMC） - 點菜安全數字（SD）

我得到這個查詢：

Select fl.name, fvl.value, f.id_feature 
From ps_feature_lang fl Left Join 
    ps_feature_product fp On fl.id_feature = fp.id_feature And fp.id_product = 291 
    Left Join 
    ps_feature_value_lang fvl On fp.id_feature_value = fvl.id_feature_value And 
    fvl.id_lang = 5 Left Join 
    ps_feature f On f.id_feature = fl.id_feature 
Where fl.id_feature In (Select ps__fc_categories_features.feature_id 
    From ps__fc_categories_features) 
Group By fl.name, fvl.value, f.id_feature, fl.id_feature 
Order By f.position 

，但如果沒有與給定產品不止一個值的功能，它會給多原糖該功能 最好的是一個查詢，將Concat的值對於具有pultiple值

每個要素

thanx in advence。

Answer 1

您應該可以通過對您的查詢進行小調整來完成此操作。試試這個：

Select fl.name, group_concat(fvl.value) as values, f.id_feature 
From ps_feature_lang fl Left Join 
    ps_feature_product fp 
    On fl.id_feature = fp.id_feature And fp.id_product = 291 Left Join 
    ps_feature_value_lang fvl 
    On fp.id_feature_value = fvl.id_feature_value And fvl.id_lang = 5 Left Join 
    ps_feature f 
    On f.id_feature = fl.id_feature 
Where fl.id_feature In (Select ps__fc_categories_features.feature_id 
         From ps__fc_categories_features 
         ) 
Group By fl.name, fl.id_feature 
Order By f.position; 

該查詢將從group by刪除fvl.value並添加group_concat()的select。我也刪除了f.id_feature。這似乎是基於join條件的冗餘。