我有一个复杂的查询。而且我卡住了位置:(。 这是我的 table 。 用户:
CREATE TABLE `users` (
`id` tinyint(4) NOT NULL,
`office_name` varchar(255) DEFAULT NULL,
`district_id` int(10) DEFAULT NULL,
`upazilla_id` int(10) DEFAULT NULL,
`address` varchar(255) DEFAULT NULL,
`mobile` varchar(11) DEFAULT NULL,
`email` varchar(50) DEFAULT NULL,
`username` varchar(50) NOT NULL,
`password` varchar(100) NOT NULL,
`type` varchar(10) NOT NULL,
`del_status` tinyint(1) NOT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1;
CREATE TABLE `service` (
`id` int(10) NOT NULL,
`recipient_number` int(50) NOT NULL,
`date` date NOT NULL,
`office_id` int(10) NOT NULL,
`del_status` tinyint(1) NOT NULL,
`creation_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
CREATE TABLE `service_list` (
`id` int(3) NOT NULL,
`service_name` varchar(50) NOT NULL,
`del_status` tinyint(1) NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
CREATE TABLE `service_transaction` (
`id` int(10) NOT NULL,
`service_transaction_id` int(50) NOT NULL,
`service_id` int(20) NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
这里,service-id = service_transaction.service_transaction_id。
我写了一个查询:
select users.id, users.office_name,service_transaction.service_id , COUNT(service_transaction.service_id) as service_total
from users
LEFT JOIN service on users.id = service.office_id
LEFT JOIN service_transaction on service_transaction.service_transaction_id = service.id
WHERE( users.del_status = 0 and users.type='agency')
GROUP BY users.office_name , users.id, service_transaction.service_id
它返回:
id office_name Service_id service_total
=============================================
2 Ctg Office 2 2
2 Ctg Office 3 4
2 Ctg Office 4 3
7 Dhaka Office NULL 0
但我的愿望输出是:
id office_name Service_id service_total
=============================================
2 Ctg Office 2 2
2 Ctg Office 3 4
2 Ctg Office 4 3
2 Ctg Office 5 0
2 Ctg Office 6 0
7 Dhaka Offc 2 0
7 Dhaka Offc 3 0
7 Dhaka Offc 4 0
7 Dhaka Offc 5 0
7 Dhaka Offc 6 0
这意味着,我必须显示每个办公室下的所有服务,如果没有服务,计数应该为零。
最佳答案
select temp.id office_id , temp.office_name, temp.svcic ,count(service_transaction.service_id) as service_total, count(recipient.id) as total_count from (select users.id, users.office_name ,service_list.id svcic from users,service_list WHERE users.del_status = 0 and users.type='agency' ) temp LEFT JOIN service on temp.id = service.office_id and service.del_status=0 LEFT JOIN service_transaction on service_transaction.service_id = temp.svcic and service_transaction.service_transaction_id=service.id right outer JOIN recipient on recipient.office_id = temp.id group by temp.id , temp.office_name, temp.svcic ORDER BY temp.id,temp.office_name
请尝试上面的代码。 为了更具可读性,您应该保持意图
关于Mysql复杂查询如果没有找到记录则生成计数为零的所有表,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/44794582/