我将这三张表用于说明目的;
从各种来源导入的所有产品都会添加到此表中。
desc data_import;
+----------+------------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+----------+------------------+------+-----+---------+----------------+
| id | int(10) unsigned | NO | PRI | NULL | auto_increment |
| retailer | varchar(255) | YES | | NULL | |
| brand | varchar(255) | YES | | NULL | |
| title | varchar(255) | YES | | NULL | |
+----------+------------------+------+-----+---------+----------------+
select * from data_import;
+----+----------+---------+--------------+
| id | retailer | brand | title |
+----+----------+---------+--------------+
| 1 | Amazon | Samsung | Galaxy Alpha |
| 2 | Newegg | Samsung | Galaxy Alpha |
+----+----------+---------+--------------+
此表格为每个零售商提供独特的产品。
desc products;
+-------+------------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-------+------------------+------+-----+---------+----------------+
| id | int(10) unsigned | NO | PRI | NULL | auto_increment |
| title | varchar(255) | YES | | NULL | |
+-------+------------------+------+-----+---------+----------------+
select * from products;
+----+--------------+
| id | title |
+----+--------------+
| 1 | Galaxy Alpha |
+----+--------------+
这是关系表。
desc products_rels;
+----------------+------------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+----------------+------------------+------+-----+---------+----------------+
| id | int(10) unsigned | NO | PRI | NULL | auto_increment |
| data_import_id | int(10) unsigned | YES | | 0 | |
| product_id | int(10) unsigned | YES | | 0 | |
| retailer_id | int(10) unsigned | YES | | 0 | |
| brand_id | int(10) unsigned | YES | | 0 | |
+----------------+------------------+------+-----+---------+----------------+
select * from products_rels;
+----+----------------+------------+-------------+----------+
| id | data_import_id | product_id | retailer_id | brand_id |
+----+----------------+------------+-------------+----------+
| 1 | 1 | 1 | 1 | 1 |
| 2 | 2 | 0 | 2 | 1 |
+----+----------------+------------+-------------+----------+
如何为零售商Galaxy Alpha添加Newegg到products并更新表products_rels中的关系密钥？
这是否可能，我该如何实现？