MySQL查询-基于权重的搜索引擎 [英] MySQL query - weight-based search engine

问题描述

这是医疗MIS表的数据库结构:

Here is the database structure for a medical MIS table:

CREATE TABLE IF NOT EXISTS `ab_med` (
  `med_id` bigint(20) NOT NULL AUTO_INCREMENT,
  `med_title` varchar(200) DEFAULT NULL,
  `med_posted_date` varchar(200) DEFAULT NULL,
  `med_company_name` varchar(200) DEFAULT NULL,
  `med_experience` varchar(200) DEFAULT NULL,
  `med_salary` varchar(200) DEFAULT NULL,
  `med_city` varchar(200) DEFAULT NULL,
  `med_description_short` text,
  `med_details_link` varchar(500) DEFAULT NULL,
  `med_from_city_type` int(1) NOT NULL DEFAULT '1',
  `med_from_city` varchar(255) DEFAULT NULL,
  `med_collected_time` datetime DEFAULT NULL,
  `med_status` int(1) NOT NULL,
  PRIMARY KEY (`med_id`),
  KEY `MedCity` (`med_city`),
  KEY `MedTitle` (`med_title`),
  KEY `MedCompany` (`med_company_name`),
  KEY `MedExperience` (`med_experience`),
  KEY `med_details_link` (`med_details_link`),
  FULLTEXT KEY `med_index` (`med_title`,`med_company_name`,`med_description_short`)
) ENGINE=MyISAM  DEFAULT CHARSET=latin1 AUTO_INCREMENT=639295 ;

大约有50万条记录.用户可以使用2个字段进行搜索:

There are around 0.5 million records. A user can search using 2 fields:

1. 关键字
2. 位置

根据得分将关键字排入med_title，med_company_name，med_description_short，med_city.

Keyword is looked into med_title, med_company_name, med_description_short, med_city as per the score.

位置已查看到med_city

我使用了全文mysql搜索，但是我需要最新的条目才能显示出更好的分数.我没有得到它的SQL查询.我正在使用以下SQL查询:

I've used full text mysql search but I need the most recent entries to show up with better score. I'm not getting the SQL query for it. I'm using the following SQL query:

SELECT distinct(med_details_link),med_id,med_title,med_posted_date,med_company_name,med_description_short,med_from_city,med_experience,med_city,med_collected_time,MATCH (med_title,med_company_name,med_description_short) AGAINST ('+hello +world' IN BOOLEAN MODE) as score
FROM ab_med
WHERE MATCH (med_title,med_company_name,med_description_short) AGAINST ('+hello +world' IN BOOLEAN MODE) order by med_id desc limit 1000

假设我搜索"hello world"，我了解应该基于以下因素来权重:

Suppose I search for "hello world", I understand that there should be weight based on:

1. 标题的权重最高
2. 公司名称的权重小于标题，但权重大于描述
3. 说明的权重最小

请帮助获取SQL查询以考虑所有这些权重并有效地进行搜索.

Please help in getting a SQL query to consider all these weights and search efficiently.

推荐答案

请考虑使用Sphinx获得令人满意的解决方案.

Consider turning to Sphinx to get a satisfactory solution to this problem.

有500万行，并且有您的要求，MySQL全文搜索的性能将令人失望.

With 5 million rows, and the requirements you have, the performance of MySQL fulltext search will be disappointing.

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