在1个查询中具有连接的多个总和

Question

我正在使用此查询遇到很多问题。它似乎没有正确计算行数，而且它缺少很多。

基本上，我在这里使用了2个表。一个用于leads，另一个用于assignments。每个潜在客户都可以多次分配，因此它可以在assignments表中有多行。 dealerships表仅用于确保它不计算某些经销商的行数。

我想在这里做的只是计算来自每个网站的潜在客户数量，并按日，周，月等细分。

以下是查询中使用的每个表的结构：

--
-- Table structure for table `assignments`
--

CREATE TABLE `assignments` (
  `id` int(11) NOT NULL auto_increment,
  `id_dealership` int(11) NOT NULL,
  `id_lead` int(11) NOT NULL,
  `date_assigned` int(11) NOT NULL,
  `website` varchar(255) NOT NULL default '',
  `make` varchar(255) NOT NULL default '',
  `model` varchar(255) NOT NULL default '',
  `ip_address` varchar(255) NOT NULL default '',
  `is_reassign` varchar(255) NOT NULL default 'no',
  `manual_or_auto` varchar(255) NOT NULL default 'N/A',
  `assigned_by` varchar(255) NOT NULL default 'N/A',
  PRIMARY KEY  (`id`),
  KEY `id_dealership` (`id_dealership`),
  KEY `date_assigned` (`date_assigned`),
  KEY `id_lead` (`id_lead`)
) ENGINE=InnoDB  DEFAULT CHARSET=latin1 AUTO_INCREMENT=26987 ;

--
-- Table structure for table `dealerships`
--

CREATE TABLE `dealerships` (
  `id` int(11) NOT NULL auto_increment,
  `province` varchar(255) NOT NULL default '',
  `city` varchar(255) NOT NULL default '',
  `name` varchar(255) NOT NULL,
  `email` text NOT NULL,
  `email_subject` varchar(255) NOT NULL default 'Car Lead',
  `type` varchar(255) NOT NULL,
  `make` varchar(255) NOT NULL,
  `leads` int(11) NOT NULL default '0',
  `status` varchar(255) NOT NULL,
  `low_notif` int(11) NOT NULL,
  `reassign_id` int(11) NOT NULL,
  `reassign_days` int(11) NOT NULL,
  `salesman` varchar(255) NOT NULL,
  PRIMARY KEY  (`id`)
) ENGINE=InnoDB  DEFAULT CHARSET=latin1 AUTO_INCREMENT=190 ;

--
-- Table structure for table `leads`
--

CREATE TABLE `leads` (
  `id` int(11) NOT NULL auto_increment,
  `id_inf` int(11) NOT NULL,
  `name_first` varchar(255) NOT NULL,
  `name_last` varchar(255) NOT NULL,
  `email` varchar(255) NOT NULL,
  `phone_home` varchar(255) NOT NULL,
  `phone_cell` varchar(255) NOT NULL,
  `phone_work` varchar(255) NOT NULL,
  `postcode` varchar(255) NOT NULL,
  `website` varchar(255) NOT NULL,
  `address` varchar(255) NOT NULL,
  `province` varchar(255) NOT NULL,
  `employer` varchar(255) NOT NULL,
  `city` varchar(255) NOT NULL,
  `rentorown` varchar(255) NOT NULL,
  `emp_months` varchar(255) NOT NULL,
  `emp_years` varchar(255) NOT NULL,
  `sin` varchar(255) NOT NULL,
  `occupation` varchar(255) NOT NULL,
  `monthly_income` varchar(255) NOT NULL,
  `bankruptcy` varchar(255) NOT NULL,
  `tradein` varchar(255) NOT NULL,
  `cosign` varchar(255) NOT NULL,
  `monthly_payment` varchar(255) NOT NULL,
  `residence_years` varchar(255) NOT NULL,
  `residence_months` varchar(255) NOT NULL,
  `birthday` varchar(255) NOT NULL,
  `make` varchar(255) NOT NULL,
  `model` varchar(255) NOT NULL,
  `date_added` int(11) NOT NULL,
  `ip_address` varchar(255) NOT NULL default '',
  `time_to_call` varchar(255) NOT NULL,
  `referrer` varchar(255) NOT NULL default '',
  `source` varchar(255) NOT NULL,
  PRIMARY KEY  (`id`),
  KEY `id_infusionsoft` (`id_infusionsoft`),
  KEY `date_added` (`date_added`)
) ENGINE=InnoDB  DEFAULT CHARSET=latin1 AUTO_INCREMENT=22488 ;

以下是我正在使用的查询：

select 
l.website,
sum(case when date_format(from_unixtime(COALESCE(a.date_assigned, l.date_added)), '%Y-%m-%d') = date_format(now(), '%Y-%m-%d') then 1 else 0 end) AS c_day,
sum(case when date_format(from_unixtime(COALESCE(a.date_assigned, l.date_added)), '%Y-%m-%d') = date_format(now() - interval 1 day, '%Y-%m-%d') then 1 else 0 end) AS c_yesterday,
sum(case when date_format(from_unixtime(COALESCE(a.date_assigned, l.date_added)), '%Y-%m-%d') = date_format(now() - interval 2 day, '%Y-%m-%d') then 1 else 0 end) AS c_2_days,
sum(case when date_format(from_unixtime(COALESCE(a.date_assigned, l.date_added)), '%Y-%m-%d') = date_format(now() - interval 3 day, '%Y-%m-%d') then 1 else 0 end) AS c_3_days,
sum(case when date_format(from_unixtime(COALESCE(a.date_assigned, l.date_added)), '%Y-%m-%d') = date_format(now() - interval 4 day, '%Y-%m-%d') then 1 else 0 end) AS c_4_days,
sum(case when date_format(from_unixtime(COALESCE(a.date_assigned, l.date_added)), '%Y-%m-%d') = date_format(now() - interval 5 day, '%Y-%m-%d') then 1 else 0 end) AS c_5_days,
sum(case when date_format(from_unixtime(COALESCE(a.date_assigned, l.date_added)), '%Y-%m-%d') = date_format(now() - interval 6 day, '%Y-%m-%d') then 1 else 0 end) AS c_6_days,
sum(case when date_format(from_unixtime(COALESCE(a.date_assigned, l.date_added)), '%Y-%m-%d') = date_format(now() - interval 7 day, '%Y-%m-%d') then 1 else 0 end) AS c_7_days,
sum(case when YEARWEEK(FROM_UNIXTIME(COALESCE(a.date_assigned, l.date_added))) = YEARWEEK(CURDATE()) then 1 else 0 end) AS c_week, 
sum(case when date_format(from_unixtime(COALESCE(a.date_assigned, l.date_added)), '%Y-%m')= date_format(now(), '%Y-%m') then 1 else 0 end) AS c_month,
sum(case when date_format(from_unixtime(COALESCE(a.date_assigned, l.date_added)), '%Y-%m')= date_format(now() - interval 1 month, '%Y-%m') then 1 else 0 end) AS c_last_month,
sum(case when date_format(from_unixtime(COALESCE(a.date_assigned, l.date_added)), '%Y-%m')= date_format(now() - interval 2 month, '%Y-%m') then 1 else 0 end) AS c_2_months,
sum(case when date_format(from_unixtime(COALESCE(a.date_assigned, l.date_added)), '%Y-%m')= date_format(now() - interval 3 month, '%Y-%m') then 1 else 0 end) AS c_3_months,
sum(case when date_format(from_unixtime(COALESCE(a.date_assigned, l.date_added)), '%Y-%m')= date_format(now() - interval 4 month, '%Y-%m') then 1 else 0 end) AS c_4_months,
sum(case when date_format(from_unixtime(COALESCE(a.date_assigned, l.date_added)), '%Y-%m')= date_format(now() - interval 5 month, '%Y-%m') then 1 else 0 end) AS c_5_months,
sum(case when date_format(from_unixtime(COALESCE(a.date_assigned, l.date_added)), '%Y-%m')= date_format(now() - interval 6 month, '%Y-%m') then 1 else 0 end) AS c_6_months,
sum(case when date_format(from_unixtime(COALESCE(a.date_assigned, l.date_added)), '%Y')= date_format(now(), '%Y') then 1 else 0 end) AS c_year  
from `leads` as l
left join `assignments` as a on (a.id_lead = l.id)
left join `dealerships` as d on (d.id = a.id_dealership)
where a.is_reassign='no' and a.id_dealership not in ('65', '77', '89', '138', '175', '177')
group by l.website
order by l.website asc

有一点需要注意的是，有时导致date_added表中缺少leads字段，但导致date_assigned的{​​{1}}存在反之亦然。

为什么我的查询无法正常运行？任何帮助将不胜感激。