在包含两个表的记录的交叉表的单个查询中选择三个记录-MYSQL

Question

I have a main table called "product" that is linked with three tables:

"product_type", 
"feature", 
"type_feature" 

and a cross table called "product_feature" that contains several features of the same product.

Example one record:

I have something similar like this:

product_type

id_product_type    name
    1              Phone

feature

id_feature   name
    1         Memory 
    2         Color 
    3         Memory Ram

feature_type

id_feature_type  id_feature  value
      1              1         16GB
      2              1         32GB
      3              2         Blue
      4              2         Black
      5              3         2GB
      6              3         3GB  

product

id_product id_product_type  price quantity  model
    1           1           100$    5      Moto-G7 

Cross table "product_feature" (linked to "product", "feature" and "feature_type"):

id_feature id_product id_feature_type
    1          1            1
    2          1            3
    3          1            6

I want query show this:

id_product   type_name price quantity   model    feature_name  value  
    1        Phone     100$     5      Moto-G7     Memory       16GB
feature_name2 value2  feature_name3   value3
    Color      Blue    Memory Ram       3GB

I tried this, but only I have only one feature_name and value, and I need three:

  SELECT p.id_product, pt.name, model, price, quantity, f.name AS feature, ft.value
  FROM product p
  LEFT JOIN product_type pt ON pt.id_product_type = p.id_product_type 
  LEFT JOIN product_feature pf ON pf.id_product = p.id_product
  LEFT JOIN feature f ON f.id_feature = pf.id_feature
  LEFT JOIN feature_type ft ON ft.id_feature_type = pf.id_feature_type
  GROUP BY p.id_product;

Answer 1

Try this query, It will give you the results:

SELECT product.*, product_type.name as TypeName, (SELECT CONCAT( GROUP_CONCAT(feature_type.value), "|", GROUP_CONCAT(feature.name) ) FROM `product_feature` INNER JOIN feature_type on product_feature.id_feature_type = feature_type.id_feature_type INNER JOIN feature on feature_type.id_feature = feature.id_feature WHERE product_feature.id_product=1 GROUP BY product_feature.id_product) as options FROM `product` LEFT JOIN product_type on product.id_product_type = product_type.id_product_type

You will get options for your product and you have to explode() those options by "|" and you can count how many options you have by using $count= count(explode("|", $options))

By this way you can get all options .