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查询商品图片

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Release: 2016-06-06 20:29:26
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有一张商品表:

<code>+--------------+---------------+------+-----+---------+----------------+
| Field        | Type          | Null | Key | Default | Extra          |
+--------------+---------------+------+-----+---------+----------------+
| id           | int(11)       | NO   | PRI | NULL    | auto_increment |
| cate_id      | int(11)       | NO   |     | NULL    |                |
| name         | varchar(100)  | NO   |     | NULL    |                |
| name_extend  | varchar(200)  | NO   |     | NULL    |                |
| price        | decimal(10,2) | NO   |     | NULL    |                |
| origin_price | decimal(10,2) | NO   |     | NULL    |                |
| stock        | int(11)       | NO   |     | NULL    |                |
| desc         | tinytext      | NO   |     | NULL    |                |
| detail       | text          | NO   |     | NULL    |                |
| express      | int(11)       | NO   |     | NULL    |                |
| status       | tinyint(1)    | NO   |     | NULL    |                |
| slide        | tinyint(1)    | NO   |     | NULL    |                |
| is_delete    | tinyint(1)    | NO   |     | NULL    |                |
| add_time     | int(11)       | NO   |     | NULL    |                |
+--------------+---------------+------+-----+---------+----------------+</code>
Copy after login
Copy after login

有一张商品的图片表:

<code>+----------+--------------+------+-----+---------+----------------+
| Field    | Type         | Null | Key | Default | Extra          |
+----------+--------------+------+-----+---------+----------------+
| id       | int(11)      | NO   | PRI | NULL    | auto_increment |
| goods_id | int(11)      | NO   |     | NULL    |                |
| img_path | varchar(255) | NO   |     | NULL    |                |
| is_main  | tinyint(1)   | NO   |     | NULL    |                |
| add_time | int(11)      | NO   |     | NULL    |                |
+----------+--------------+------+-----+---------+----------------+</code>
Copy after login
Copy after login

商品表与商品图片表是一对多的关系,现在要获取商品的信息及所有图片,怎么查会比较合适点?

回复内容:

有一张商品表:

<code>+--------------+---------------+------+-----+---------+----------------+
| Field        | Type          | Null | Key | Default | Extra          |
+--------------+---------------+------+-----+---------+----------------+
| id           | int(11)       | NO   | PRI | NULL    | auto_increment |
| cate_id      | int(11)       | NO   |     | NULL    |                |
| name         | varchar(100)  | NO   |     | NULL    |                |
| name_extend  | varchar(200)  | NO   |     | NULL    |                |
| price        | decimal(10,2) | NO   |     | NULL    |                |
| origin_price | decimal(10,2) | NO   |     | NULL    |                |
| stock        | int(11)       | NO   |     | NULL    |                |
| desc         | tinytext      | NO   |     | NULL    |                |
| detail       | text          | NO   |     | NULL    |                |
| express      | int(11)       | NO   |     | NULL    |                |
| status       | tinyint(1)    | NO   |     | NULL    |                |
| slide        | tinyint(1)    | NO   |     | NULL    |                |
| is_delete    | tinyint(1)    | NO   |     | NULL    |                |
| add_time     | int(11)       | NO   |     | NULL    |                |
+--------------+---------------+------+-----+---------+----------------+</code>
Copy after login
Copy after login

有一张商品的图片表:

<code>+----------+--------------+------+-----+---------+----------------+
| Field    | Type         | Null | Key | Default | Extra          |
+----------+--------------+------+-----+---------+----------------+
| id       | int(11)      | NO   | PRI | NULL    | auto_increment |
| goods_id | int(11)      | NO   |     | NULL    |                |
| img_path | varchar(255) | NO   |     | NULL    |                |
| is_main  | tinyint(1)   | NO   |     | NULL    |                |
| add_time | int(11)      | NO   |     | NULL    |                |
+----------+--------------+------+-----+---------+----------------+</code>
Copy after login
Copy after login

商品表与商品图片表是一对多的关系,现在要获取商品的信息及所有图片,怎么查会比较合适点?

如果商品表是 goods,图片表是 images,需要获取图片的 id 为参数,则:

<code class="sql">SELECT `goods`.`id`, `goods`.`name`, `goods`.`name_extend`, `images`.`img_path` FROM `goods`, `images` WHERE `goods`.`id` = `images`.`goods_id` AND `goods`.`id` = 'ID_IMPUTED';</code>
Copy after login

注意,其中 ID_IMPUTED 为你要指定的商品 id 值。

  1. 建议取消图片表
    如果商品图片的属性(例如:创建时间)不重要的化建议取消图片表.
    如果图片的信息不需要检索的话, 直接插入到exif中). 尽量减少数据冗余.

  2. 建议将图片id插入到商品表中的一列
    建议将图片id插入到商品表中的一列. 图片id即文件名, path根据用户id等其他因素确定.

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