MYSQL 连接两个表并合并行值

Question

我有一个包含两个表的 MySQL 数据库：

Table 1:

    Product_ID | Product_Name | Product_Description
    ------------------------------------------------
    1          | Coca-Cola    | Coke description.
    2          | Pepsi        | Pepsi description.
    3          | Fanta        | Fanta description
    ...

Table 2:

    Product_ID | Product_SKU | Product_Size | Product_Price
    ------------------------------------------------
    1          | COKE330     | 330ml        | 0.79
    1          | COKE500     | 500ml        | 1.29
    2          | PEPS330     | 330ml        | 0.59
    2          | PEPS500     | 500ml        | 0.99
    ...

我想查询数据库并将这两个表连接在一起，但合并具有相同产品 ID 的重复行，因此返回的结果最终看起来像：

    Product_ID | Product_Name | Product_Sizes | Product_Prices | Product_Description
    ---------------------------------------------------------------------------------
    1          | Coca-Cola    | 330ml, 500ml  | 0.79, 1.29     | Coke description.
    2          | Pepsi        | 330ml, 500ml  | 0.59, 0.99     | Pepsi description.
    ...

提前致谢

Answer 1

您可以对行进行分组并使用 GROUP_CONCAT() 到 assemble 分组值，如：

select
  a.product_id,
  max(a.product_name),
  group_concat(b.product_size) as product_sizes,
  group_concat(b.product_price) as product_prices,
  a.product_description
from table1 a
join table2 b on b.product_id = a.product_id
group by a.product_id

MYSQL 连接两个表并合并行值

MYSQL Join two tables and combine row values

mysql

join

concat