mysql颠覆实战笔记(四)--商品系统设计(一):商品主表设计

时间:2024-01-11 14:42:50

版权声明:笔记整理者亡命小卒热爱*,崇尚分享。但是本笔记源自www.jtthink.com(程序员在囧途)沈逸老师的《web级mysql颠覆实战课程 》。如需转载请尊重老师劳动,保留沈逸老师署名以及课程来源地址。

  这几节课沈老师先带我们说道一下商品表。

  固定商品:譬如我们只是卖鞋,那么整个商品的属性基本都是一致的,列如鞋的颜色、尺寸、款式、品牌、价格。这时候我们涉及到的表往往是平面的。

  这种涉及方法的特点:

  1、纯定制化。

  2、开发快,仅仅只要针对某些元素开发。

  3、但是扩展性差,一旦我们新增了其他类型商品,那么真个系统就要重新做。

  4、时间久了,这张表会无比大。影响系统性能。

  所以我们尽可能的要设计一个相对通用的商品表。以适应大部分的电商系统。

  今天我们先来设计一个商品主表(我们首先假设我们的是B2C)

  包含通用信息:

  (一)即时更新:id,商品名称,所属分类,入库时间,最后一次修改时间,商品简介。

  (二)延时更新/日志更新:总点击量,月点击量,总销售量,月销售量,总评价数,月评价数。

  

  下面我们在navicat里创建表 prod_main:

  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" alt="" />

  其中 prod_id 设置自动增长,设置为主键。

     prod_adddate设置默认值为CURRENT_TIMESTAMP.

  然后我们根据字段随便给这个表填入一个数据。

qizho

  我们再创建一个简单的商品类别表 prod_class: 
  aaarticlea/png;base64,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" alt="" />
  
  点击量日志表:
  
作为一个电商系统,我们出料知道商品的总点击量,还需要知道商品的周点击和月点击,然后这些数据是不能记录在商品主表中的。
  课程中我们简单点,设计到月点击就好。
  我们来创建prod_clicklog表:
  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" alt="" />
  
  接下来,我们用存储过程来模拟读书商品页面:
  1、从商品主表根据ID读取商品所有信息。
  2、如果读取到,则记录点击日志。
  我们要注意的知识点:FOUND_ROWS() select时返回最近一条SQL的结果及条数。
            ROW_COUNT(): update delete insert受影响的条数。  
BEGIN
SELECT * FROM prod_main WHERE prod_id = _prod_id LIMIT 1;
SET @num=FOUND_ROWS();
IF @num=1 THEN #代表商品取出成功
INSERT INTO prod_clicklog(prod_id,user_ip,user_id) VALUES (_prod_id,_user_ip,_user_id);
END IF;
END
参数:IN _prod_id int,IN _user_ip varchar(15),IN _user_id int

  老规矩,我们新建查询,CALL一下,得到结果:

  aaarticlea/png;base64,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" alt="" />

  然后我们再:
SELECT * from prod_clicklog;

  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" alt="" />

下节课再见!

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