mysql - sql在phpmyadmin中合并2个表

Question

我有 2 张桌子，products并且products_description. products我想要来自: products_id、products_quantity、products_model和products_image的这些字段products_price。

我想加入这个products_description领域products_description

我到目前为止的 SQL 是

SELECT products.products_id, products.products_quantity, products.products_image, products.products_price, products_image
 FROM products
 INNER JOIN products_description
 ON products.products_id=products_description.products_id
 ORDER BY products.products_id

我的结果只是从产品表中获取的字段名称，而表中没有任何内容products_description。我怎样才能解决这个问题？

Answer 1

你JOIN是正确的，但你没有从表中选择任何东西。products_description

更新您SELECT以包含来自的列products_description（替换正确的列名）。

SELECT products.products_id, ..., products_description.column_name, products_description.column_name2, ...

Answer 2

您忘记在 SELECT 语句中写入products_description.*（这将从 products_description 表中获取所有列）。

SELECT products.products_id, products.products_quantity, products.products_image, products.products_price, products_image, products_description.*
 FROM products
 INNER JOIN products_description
 ON products.products_id=products_description.products_id
 ORDER BY products.products_id