需要有关此查询的一些帮助获取我和我所有朋友的所有状态及其相关评论

Question

需要有关此查询的一些帮助获取我和我所有朋友的所有状态及其相关评论

Rey*_*rPM 2 mysql performance query mysql-5.5 query-performance

我有几天时间处理这个查询，但无法按我的意愿工作。这篇文章与此相关来自不同表的几个值，我在其中艰难找到了解决方案，但我完全错误并丢失了:(。所以基本上与另一篇文章的架构相同：5 个表：default_users、default_profiles、default_status、default_comment和 default_friend。这是每个的 SQL：

default_comment

CREATE TABLE `default_comment` (
  `comment_id` int(11) NOT NULL AUTO_INCREMENT,
  `friend_id` int(11) NOT NULL,
  `message` text COLLATE utf8_unicode_ci NOT NULL,
  `created_at` timestamp NULL DEFAULT NULL,
  `status_id` int(11) NOT NULL,
  `device` varchar(50) COLLATE utf8_unicode_ci NOT NULL,
  PRIMARY KEY (`comment_id`)
) ENGINE=InnoDB AUTO_INCREMENT=13007 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci

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默认好友

CREATE TABLE `default_friend` (
  `friend_id` int(8) NOT NULL,
  `user_id` int(8) NOT NULL,
  `is_suscriber` tinyint(1) NOT NULL DEFAULT '1',
  `privacy` tinyint(1) NOT NULL DEFAULT '0',
  `created_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  `friend_list_id` int(4) NOT NULL,
  `approved` tinyint(1) NOT NULL DEFAULT '0'
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci

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default_profiles

CREATE TABLE `default_profiles` (
  `id` int(9) NOT NULL AUTO_INCREMENT,
  `created` datetime DEFAULT NULL,
  `updated` datetime DEFAULT NULL,
  `created_by` int(11) DEFAULT NULL,
  `ordering_count` int(11) DEFAULT NULL,
  `user_id` int(11) unsigned NOT NULL,
  `display_name` varchar(50) COLLATE utf8_unicode_ci NOT NULL,
  `first_name` varchar(50) COLLATE utf8_unicode_ci NOT NULL,
  `last_name` varchar(50) COLLATE utf8_unicode_ci NOT NULL,
  `updated_on` int(11) unsigned DEFAULT NULL,
  PRIMARY KEY (`id`),
  KEY `user_id` (`user_id`)
) ENGINE=MyISAM AUTO_INCREMENT=10004 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci

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默认状态

CREATE TABLE `default_status` (
  `status_id` int(11) NOT NULL AUTO_INCREMENT,
  `message` text COLLATE utf8_unicode_ci NOT NULL,
  `created_at` timestamp NULL DEFAULT NULL,
  `privacy` tinyint(1) DEFAULT NULL,
  `user_id` int(11) NOT NULL,
  `is_reply` tinyint(1) NOT NULL DEFAULT '0',
  `device` varchar(50) COLLATE utf8_unicode_ci NOT NULL,
  PRIMARY KEY (`status_id`)
) ENGINE=InnoDB AUTO_INCREMENT=13005 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci

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默认用户

CREATE TABLE `default_users` (
  `id` smallint(5) unsigned NOT NULL AUTO_INCREMENT,
  `email` varchar(60) COLLATE utf8_unicode_ci NOT NULL DEFAULT '',
  `password` varchar(100) COLLATE utf8_unicode_ci NOT NULL DEFAULT '',
  `salt` varchar(6) COLLATE utf8_unicode_ci NOT NULL DEFAULT '',
  `group_id` int(11) DEFAULT NULL,
  `ip_address` varchar(16) COLLATE utf8_unicode_ci DEFAULT NULL,
  `active` int(1) DEFAULT NULL,
  `activation_code` varchar(40) COLLATE utf8_unicode_ci DEFAULT NULL,
  `created_on` int(11) NOT NULL,
  `last_login` int(11) NOT NULL,
  `username` varchar(20) COLLATE utf8_unicode_ci DEFAULT NULL,
  `forgotten_password_code` varchar(40) COLLATE utf8_unicode_ci DEFAULT NULL,
  `remember_code` varchar(40) COLLATE utf8_unicode_ci DEFAULT NULL,
  PRIMARY KEY (`id`),
  KEY `email` (`email`)
) ENGINE=InnoDB AUTO_INCREMENT=10004 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci COMMENT='Registered User Information'

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所以我建立了这个查询

SELECT DISTINCT
    u.id AS user_id,
    u.email,
    p.display_name,
    p.first_name,
    p.last_name,
    s.status_id,
    s.message,
    f.friend_id,
    f.user_id,
    UNIX_TIMESTAMP(s.created_at) AS created_at
FROM
    default_users u
        LEFT JOIN
    default_friend f ON ((f.friend_id = 1 OR f.user_id = 1) AND f.approved = 1)
        LEFT JOIN
    default_status s ON (u.id = s.user_id OR f.friend_id = s.user_id OR f.user_id = s.user_id)
        LEFT JOIN
    default_profiles p ON (s.user_id = p.user_id)
WHERE
    u.id = 1
ORDER BY s.created_at DESC
LIMIT 0 , 10

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这是结果：

+---------+---------------------+--------------------+-----------------------------+----------------------------+-----------+------------------------------------------------------------------------------------------------------+-----------+---------+------------+
| user_id | email               | display_name       | first_name                  | last_name                  | status_id | message                                                                                              | friend_id | user_id | created_at |
+---------+---------------------+--------------------+-----------------------------+----------------------------+-----------+------------------------------------------------------------------------------------------------------+-----------+---------+------------+
|       1 | reynierpm@gmail.com | Reynier Perez Mira | Reynier                     | Perez Mira                 |     12686 | c1aqq8fy7lp8c2gvph4j3mwllqrtvohf2oto2dsgv6qkgsdf98w7029vpriju7p87h0zvrt7nqrp7v61v3zw7a5zg96sl0mfts4w |         2 |       1 | 1345055203 |
|       1 | reynierpm@gmail.com | Reynier Perez Mira | Reynier                     | Perez Mira                 |     12686 | c1aqq8fy7lp8c2gvph4j3mwllqrtvohf2oto2dsgv6qkgsdf98w7029vpriju7p87h0zvrt7nqrp7v61v3zw7a5zg96sl0mfts4w |         1 |       3 | 1345055203 |
|       1 | reynierpm@gmail.com | Reynier Perez Mira | Reynier                     | Perez Mira                 |     12686 | c1aqq8fy7lp8c2gvph4j3mwllqrtvohf2oto2dsgv6qkgsdf98w7029vpriju7p87h0zvrt7nqrp7v61v3zw7a5zg96sl0mfts4w |         1 |    4315 | 1345055203 |
|       1 | reynierpm@gmail.com | Reynier Perez Mira | Reynier                     | Perez Mira                 |     12686 | c1aqq8fy7lp8c2gvph4j3mwllqrtvohf2oto2dsgv6qkgsdf98w7029vpriju7p87h0zvrt7nqrp7v61v3zw7a5zg96sl0mfts4w |      6380 |       1 | 1345055203 |
|       1 | reynierpm@gmail.com | Demo               | Demo                        | Demo                       |     10484 | ivp1e40f350bf6ifplzsd560k6e5mvgvdq91q7j2k5oldraoftbd2k2eirtdihh7fbqwq2mkohqi05d3fw0sawvqmabah979updo |         2 |       1 | 1345055064 |
|       1 | reynierpm@gmail.com | User 1             | User                        | User                       |     10494 | arstvbkjrea725bea4mv1kv1qaelt669n7mequh5j6n5uzh8a3voy7w6lvebphrhkhnks9fzos46p8sqptud1mb3wysjpge653qe |         1 |       3 | 1345055064 |
|       1 | reynierpm@gmail.com | user502bc8a4942d1  | user502bc8a4942d1-firstname | user502bc8a4942d1-lastname |      7796 | vmkhv266hu8s7czpy1j2m1cvi3j1i3jr35hl76fsdqdv1cacv5etylls3q6yqrm7r2nrymjcqrvtzu267huajs5g9j9t3kdz6f9l |         1 |    4315 | 1345054882 |
|       1 | reynierpm@gmail.com | user502bc90a00ba4  | user502bc90a00ba4-firstname | user502bc90a00ba4-lastname |      6103 | c3mmq89ucbcjd0w1pdak0tgtioyfy5loa3z18ecmkwukusojbr6qwosbham8d132fzq1pn6ei3h5dgoabyvytyyuiqm2k09fmudy |      6380 |       1 | 1345054774 |
|       1 | reynierpm@gmail.com | Demo               | Demo                        | Demo                       |      3828 | hky500btaj5rq96inod22k1zpyh1uz65892mwanuloqkqgjo1h3u2f0ikery3pe3olwoqbqq08t301vqpuhirvddp3lq6w5ppoep |         2 |       1 | 1345054631 |
|       1 | reynierpm@gmail.com | Reynier Perez Mira | Reynier                     | Perez Mira                 |      2364 | zfe25at726i4bsju21v3ipcpp6bhetdrqva7m4ceh0k2pcdj6equbnq89mlg892eh5eqq1l1514qir76pqq5u7qnqyai6dqnv45n |         2 |       1 | 1345054536 |
+---------+---------------------+--------------------+-----------------------------+----------------------------+-----------+------------------------------------------------------------------------------------------------------+-----------+---------+------------+
10 rows in set (0.08 sec)

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但是如果我运行这个查询来获取我的朋友：

SELECT 
    *
FROM
    default_friend
WHERE
    user_id = 1 OR friend_id = 1

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这是结果

+-----------+---------+--------------+---------+---------------------+----------------+----------+
| friend_id | user_id | is_suscriber | privacy | created_at          | friend_list_id | approved |
+-----------+---------+--------------+---------+---------------------+----------------+----------+
|         2 |       1 |            1 |       0 | 2012-08-13 13:46:11 |              0 |        1 |
|         1 |       3 |            1 |       0 | 2012-08-14 14:46:11 |              0 |        1 |
|         1 |    4315 |            1 |       0 | 2012-08-15 11:57:51 |              0 |        1 |
|      6380 |       1 |            1 |       0 | 2012-08-15 11:58:47 |              0 |        1 |
+-----------+---------+--------------+---------+---------------------+----------------+----------+
4 rows in set (0.01 sec)

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另外，如果我运行另一个来接收我和我所有朋友的消息：

SELECT 
    *
FROM
    default_status
WHERE
    user_id = 1 OR user_id = 3 OR user_id = 4315 OR user_id = 6380

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我得到这个结果：

+-----------+------------------------------------------------------------------------------------------------------+---------------------+---------+---------+----------+--------+
| status_id | message                                                                                              | created_at          | privacy | user_id | is_reply | device |
+-----------+------------------------------------------------------------------------------------------------------+---------------------+---------+---------+----------+--------+
|         1 | dasdasdasdasdasd                                                                                     | 2012-08-13 15:15:37 |    NULL |       1 |        0 |        |
|         3 | dasdsad344hbvnbnhjhgjhjghjhj                                                                         | 2012-08-13 17:24:53 |    NULL |       1 |        0 |        |
|         4 | dasdsad344hbvnbnhjhgjhjghjhjsdfsdfsdfsdfdsfsdfsdfsdfsdfsdfsdfsdfsdfsdfsdfsdf                         | 2012-08-13 17:24:53 |    NULL |       3 |        0 |        |
|       834 | pgmafjmzicgdqu1fo0fv3sg4qipq4dm3qnubpo4gpyfz5y7q0p9kl75c18c9tsr01u92fqfoyyw12vl7zn1bht4vhnyf2b5cldrp | 2012-08-15 13:43:57 |    NULL |       3 |        0 |        |
|      2364 | zfe25at726i4bsju21v3ipcpp6bhetdrqva7m4ceh0k2pcdj6equbnq89mlg892eh5eqq1l1514qir76pqq5u7qnqyai6dqnv45n | 2012-08-15 13:45:36 |    NULL |       1 |        0 |        |
|      6103 | c3mmq89ucbcjd0w1pdak0tgtioyfy5loa3z18ecmkwukusojbr6qwosbham8d132fzq1pn6ei3h5dgoabyvytyyuiqm2k09fmudy | 2012-08-15 13:49:34 |    NULL |    6380 |        0 |        |
|      7796 | vmkhv266hu8s7czpy1j2m1cvi3j1i3jr35hl76fsdqdv1cacv5etylls3q6yqrm7r2nrymjcqrvtzu267huajs5g9j9t3kdz6f9l | 2012-08-15 13:51:22 |    NULL |    4315 |        0 |        |
|     10494 | arstvbkjrea725bea4mv1kv1qaelt669n7mequh5j6n5uzh8a3voy7w6lvebphrhkhnks9fzos46p8sqptud1mb3wysjpge653qe | 2012-08-15 13:54:24 |    NULL |       3 |        0 |        |
|     12686 | c1aqq8fy7lp8c2gvph4j3mwllqrtvohf2oto2dsgv6qkgsdf98w7029vpriju7p87h0zvrt7nqrp7v61v3zw7a5zg96sl0mfts4w | 2012-08-15 13:56:43 |    NULL |       1 |        0 |        |
+-----------+------------------------------------------------------------------------------------------------------+---------------------+---------+---------+----------+--------+
9 rows in set (0.02 sec)

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那么在这个解释之后，我的第一个查询出了什么问题？我在第一个查询中不存在的其他选择中得到了什么结果？（带有 JOIN 的那个），有什么帮助或建议吗？非常重要的测试文件在我的 Dropbox https://www.dropbox.com/s/tu4rb7osppyd8un/comvivem_db.sql

Answer 1

Wor*_*DBA 5

好的，所以根据我们的对话，如果您确保在创建好友请求时您也在另一个方向创建了一个条目：（即 Friend_A 询问 Friend_B，但您还需要 Friend_B 和 Friend_A 之间的关系）然后您可以运行以下查询以获得您需要的结果：

select distinct
s.user_id, 
u.username,
p.display_name,
p.first_name,
p.last_name,
s.message
from default_status as s
join default_friend as f on f.user_id = s.user_id
join default_users as u on u.id = s.user_id
join default_profiles as p on p.user_id = u.id
where (f.user_id = 1 or f.friend_id = 1)
and f.approved = 1
order by s.created_at desc;

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这也将更容易获得一个人的所有朋友的列表：

select *
from default_users as u
join default_friends as f on f.friend_id = u.id
where f.user_id = 1;

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请记住在默认的friends_table 中为user_id 和friend_id 放置一个索引，否则您会发现您的查询可能需要一段时间：

create unique index idx_friend on default_friend(user_id,friend_id);

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我希望这可以帮助你。;-)

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