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我有以下 2 个查询，并希望在 store_id 上加入它们以获取在特定邮政编码区域销售戴尔产品的商店的数量、商店是否营业、该商店的评论总数以及平均评分评论

SELECT s.* , sh . * , d . * , pd . *, 
CASE
  When (holiday = "Y") THEN "Holiday"
END AS open_status
FROM delivery d, products_description pd, store s, store_hours sh 
WHERE d.deliver_to_postcode =5140 
AND d.store_id = pd.store_id 
AND (pd.products_name like '%dell%' or pd.products_description like '%dell%') 
AND pd.store_id = s.store_id 
AND s.store_id = sh.store_id 
AND sh.weekday = dayname( curdate( ) ) 
GROUP BY  d.store_id'


'SELECT store_id, count( * ) AS  reviews, avg( reviews_rating ) AS  rating 
FROM reviews
WHERE  reviews_status =1'


Total stores  | store_id  | store_name  | Postcode | reviews | rating      | open_status
----------------------------------------------------------------------------------------------------------------------
2             |   1       | store 1     | 5140     |   3     |   2 star    | Holiday
2             |   2       | store 2     | 5140     |   1     |   2 star    | Holiday

如何加入这两个查询以给出上述结果？

我添加了数据库表

Delivery

Store_id |   postcode
--------------------------
1        |  5140
1        |  5200
2        |  5140


Product description

Store_id | product_name
------------------------
1        | pc dell
1        | pc ibm
2        | screen dell


Store

Store_id | Name
-------------------
1        | Store 1
2        | Store 2


Store hours

Store_id | Holiday
-------------------
1        | N
2        | N


Reviews

Store_id | Product  | Review    | review rating
------------------------------------------------
1        | 1        | review 1  |   3 star
1        | 1        | review 2  |   3 star
1        | 2        | review 1  |   3 star
2        | 1        | review 1  |   2 star

我已经添加了数据库 SQL

--

-- 表的表结构delivery

  CREATE TABLE IF NOT EXISTS `delivery` (
   `store_id` int(11) NOT NULL DEFAULT '1',
   `deliver_to_postcode` int(11) NOT NULL,
   PRIMARY KEY (`store_id`,`deliver_to_postcode`)
   ) ENGINE=MyISAM DEFAULT CHARSET=utf8;

--

-- 表的表结构products_description

CREATE TABLE IF NOT EXISTS `products_description` (
    `store_id` int(11) NOT NULL DEFAULT '1',
    `products_id` int(11) NOT NULL AUTO_INCREMENT,
    `language_id` int(11) NOT NULL DEFAULT '1',
    `products_name` varchar(255) NOT NULL DEFAULT '',
    `products_short_description` text,
    `products_description` text,
    `products_keyword` varchar(64) DEFAULT NULL,
    `products_tags` varchar(255) DEFAULT NULL,
    `products_url` varchar(255) DEFAULT NULL,
    `products_friendly_url` varchar(255) DEFAULT NULL,
    `products_page_title` varchar(255) NOT NULL,
    `products_meta_keywords` varchar(255) NOT NULL,
    `products_meta_description` varchar(255) NOT NULL,
    `products_viewed` int(5) DEFAULT '0',
     PRIMARY KEY (`store_id`,`products_id`,`language_id`),
     KEY `products_name` (`products_name`),
     KEY `products_description_keyword` (`products_keyword`)
  ) ENGINE=MyISAM  DEFAULT CHARSET=utf8 AUTO_INCREMENT=20 ;

--

-- 表的表结构store

CREATE TABLE IF NOT EXISTS `store` (
   `store_id` int(11) NOT NULL AUTO_INCREMENT,
   `customer_id` int(11) NOT NULL DEFAULT '1',
   `store_name` varchar(64) NOT NULL,
   PRIMARY KEY (`store_id`),
   KEY `customer_id` (`customer_id`)
 ) ENGINE=MyISAM  DEFAULT CHARSET=utf8 AUTO_INCREMENT=1 ;

--

-- 表的表结构store_hours

CREATE TABLE IF NOT EXISTS `store_hours` (
    `store_id` int(11) NOT NULL,
    `weekday` varchar(10) NOT NULL,
    `holiday` char(1) NOT NULL DEFAULT 'N',
    KEY `store_id` (`store_id`)
 ) ENGINE=MyISAM DEFAULT CHARSET=utf8;

--

-- 表的表结构reviews

 CREATE TABLE IF NOT EXISTS `reviews` (
    `store_id` int(11) NOT NULL DEFAULT '1',
    `reviews_id` int(11) NOT NULL AUTO_INCREMENT,
    `products_id` int(11) NOT NULL,
    `customers_id` int(11) DEFAULT NULL,
    `reviews_rating` int(1) DEFAULT NULL,
    `languages_id` int(11) NOT NULL,
    `reviews_text` text NOT NULL,
    `date_added` datetime DEFAULT NULL,
    `last_modified` datetime DEFAULT NULL,
    `reviews_read` int(5) NOT NULL DEFAULT '0',
    `reviews_status` tinyint(1) NOT NULL,
     PRIMARY KEY (`store_id`,`reviews_id`)
  ) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=1 ;
4

3 回答 3

0

尝试这个

SELECT
    count(s.store_id) count,
    s.*,
    sh.*,
    ( SELECT count(*)
      FROM reviews r
      WHERE r.reviews_status = 1 AND r.store_id = s.store_dd ) reviews
FROM store s
JOIN delivery d ON s.store_id = d.store_id
JOIN products_description pd ON pd.store_id = d.store_id
JOIN store_hours sh ON sh.store_id = d.store_id
WHERE
    d.deliver_to_postcode = 5140 AND
    sh.weekday = dayname(curdate()) AND
    (pd.products_name LIKE '%dell%' OR pd.products_description LIKE '%dell%')
GROUP BY s.store_id

我不能为你做更多，因为我没有你的数据库模型/结构

于 2013-10-15T10:48:51.080 回答
0

你可以在这里看到一个解决方案：http ://sqlfiddle.com/#!2/691a1/8

关于这个解决方案有一些注意事项：

  • 我相信您上面的查询是“错误的”。第一个查询有一个GROUP BY, 而不是聚合函数。您的第二个查询具有聚合函数，但没有GROUP BY行。我将该GROUP BY子句移至第二个查询。
  • 使用星号是多余的。SQLFiddle 不列出重复的列。因此，store_id 只列出一次。
  • 我将您的第一个查询从使用隐式（theta 样式）连接更改为显式（ANSI 样式）连接。

这是查询

SELECT tmp.*, s.* , sh.* , d.* , pd.*, 
  CASE
    When (holiday = "Y") THEN "Holiday"
  END AS open_status
FROM delivery d
JOIN  products_description pd
  ON d.store_id = pd.store_id
JOIN store s
  ON pd.store_id = s.store_id
JOIN store_hours sh 
  ON s.store_id = sh.store_id
JOIN (
    SELECT store_id, count(*) AS  reviews, avg(reviews_rating) AS  rating 
    FROM reviews
    WHERE  reviews_status =1
    GROUP BY store_id) AS tmp
  ON tmp.store_id = s.store_id
WHERE d.deliver_to_postcode =5140 
  AND (pd.products_name like '%dell%' or pd.products_description like '%dell%') 
  AND sh.weekday = dayname( curdate( ) )
于 2013-10-18T11:15:41.867 回答
0

要回答您的部分问题 - 这是为了加入您的两个查询而要遵循的语法格式 - 在[[query placeholder]]中填写您的 SQL 语句

SELECT  *
FROM (
  [[query1]]
  ) AS q1
JOIN (
   [[query2]]
  ) AS q2
  ON q1.store_id = q2.store_id

注意：我使用星号是出于演示目的，请不要将其投入生产。另外，我不明白为什么您的第一个查询使用 GROUP BY - 没有聚合函数。

于 2013-10-15T11:05:30.143 回答