mysql-根据起始日期和日期连接两个表
我有下面的表结构 表mysql-根据起始日期和日期连接两个表,mysql,sql,Mysql,Sql,我有下面的表结构 表小时费率 CREATE TABLE `hour_rate` ( `hour_rate_id` int(11) NOT NULL AUTO_INCREMENT, `hour_rate` decimal(8,2) NOT NULL, `from_date` date NOT NULL, `employee_id` int(11) NOT NULL, PRIMARY KEY (`hour_rate_id`), UNIQUE KEY `idx-unique-hour_ra
小时费率
CREATE TABLE `hour_rate` (
`hour_rate_id` int(11) NOT NULL AUTO_INCREMENT,
`hour_rate` decimal(8,2) NOT NULL,
`from_date` date NOT NULL,
`employee_id` int(11) NOT NULL,
PRIMARY KEY (`hour_rate_id`),
UNIQUE KEY `idx-unique-hour_rate-from_date-employee_id`
(`from_date`,`employee_id`),
KEY `idx-hour_rate-employee_id` (`employee_id`),
CONSTRAINT `fk-hour_rate-employee_id` FOREIGN KEY (`employee_id`)
REFERENCES `employee` (`employee_id`) ON DELETE CASCADE ON UPDATE CASCADE,
) ENGINE=InnoDB;
+-----------+------------+-------------+
| hour_rate | from_date | employee_id |
+-----------+------------+-------------+
| 11.00 | 2018-01-10 | 1 |
| 12.00 | 2018-01-14 | 1 |
| 13.00 | 2018-01-18 | 1 |
| 5.00 | 2018-01-01 | 1 |
| 10.00 | 2018-01-15 | 2 |
+-----------+------------+-------------+
表员工工作
CREATE TABLE `employee_work` (
`employee_work_id` int(11) NOT NULL AUTO_INCREMENT,
`project_id` int(11) NOT NULL,
`employee_id` int(11) NOT NULL,
`date` date NOT NULL,
`hours` int(11) NOT NULL,
PRIMARY KEY (`employee_work_id`),
UNIQUE KEY `idx-unique-employee_work-employee_id-date`
(`employee_id`,`date`),
KEY `idx-employee_work-employee_id` (`employee_id`),
CONSTRAINT `fk-employee_work-employee_id` FOREIGN KEY (`employee_id`)
REFERENCES `employee` (`employee_id`) ON DELETE CASCADE ON UPDATE CASCADE,
) ENGINE=InnoDB;
+-------------+------------+-------+
| employee_id | date | hours |
+-------------+------------+-------+
| 1 | 2018-01-01 | 8 |
| 1 | 2018-01-02 | 8 |
| 1 | 2018-01-03 | 8 |
| 1 | 2018-01-04 | 8 |
| 1 | 2018-01-05 | 8 |
| 1 | 2018-01-08 | 8 |
| 1 | 2018-01-09 | 8 |
| 1 | 2018-01-10 | 8 |
| 1 | 2018-01-11 | 8 |
| 1 | 2018-01-12 | 8 |
| 1 | 2018-01-15 | 8 |
| 1 | 2018-01-16 | 8 |
| 1 | 2018-01-17 | 8 |
| 1 | 2018-01-18 | 8 |
| 1 | 2018-01-19 | 8 |
+-------------+------------+-------+
表hour\u rate
包含从日期(from\u date
)开始的员工及其小时费率(hour\u rate
)的记录
表employee\u work
包含员工每天工作时间的记录
我想根据date
和from\u date
,从hour\u rate
中选择所有记录employee\u work
,选择适当小时率的hour\u rate
*hours
,这样我就可以计算员工的工资了
例如,我有以下记录
在小时费率中
CREATE TABLE `hour_rate` (
`hour_rate_id` int(11) NOT NULL AUTO_INCREMENT,
`hour_rate` decimal(8,2) NOT NULL,
`from_date` date NOT NULL,
`employee_id` int(11) NOT NULL,
PRIMARY KEY (`hour_rate_id`),
UNIQUE KEY `idx-unique-hour_rate-from_date-employee_id`
(`from_date`,`employee_id`),
KEY `idx-hour_rate-employee_id` (`employee_id`),
CONSTRAINT `fk-hour_rate-employee_id` FOREIGN KEY (`employee_id`)
REFERENCES `employee` (`employee_id`) ON DELETE CASCADE ON UPDATE CASCADE,
) ENGINE=InnoDB;
+-----------+------------+-------------+
| hour_rate | from_date | employee_id |
+-----------+------------+-------------+
| 11.00 | 2018-01-10 | 1 |
| 12.00 | 2018-01-14 | 1 |
| 13.00 | 2018-01-18 | 1 |
| 5.00 | 2018-01-01 | 1 |
| 10.00 | 2018-01-15 | 2 |
+-----------+------------+-------------+
在员工工作中
CREATE TABLE `employee_work` (
`employee_work_id` int(11) NOT NULL AUTO_INCREMENT,
`project_id` int(11) NOT NULL,
`employee_id` int(11) NOT NULL,
`date` date NOT NULL,
`hours` int(11) NOT NULL,
PRIMARY KEY (`employee_work_id`),
UNIQUE KEY `idx-unique-employee_work-employee_id-date`
(`employee_id`,`date`),
KEY `idx-employee_work-employee_id` (`employee_id`),
CONSTRAINT `fk-employee_work-employee_id` FOREIGN KEY (`employee_id`)
REFERENCES `employee` (`employee_id`) ON DELETE CASCADE ON UPDATE CASCADE,
) ENGINE=InnoDB;
+-------------+------------+-------+
| employee_id | date | hours |
+-------------+------------+-------+
| 1 | 2018-01-01 | 8 |
| 1 | 2018-01-02 | 8 |
| 1 | 2018-01-03 | 8 |
| 1 | 2018-01-04 | 8 |
| 1 | 2018-01-05 | 8 |
| 1 | 2018-01-08 | 8 |
| 1 | 2018-01-09 | 8 |
| 1 | 2018-01-10 | 8 |
| 1 | 2018-01-11 | 8 |
| 1 | 2018-01-12 | 8 |
| 1 | 2018-01-15 | 8 |
| 1 | 2018-01-16 | 8 |
| 1 | 2018-01-17 | 8 |
| 1 | 2018-01-18 | 8 |
| 1 | 2018-01-19 | 8 |
+-------------+------------+-------+
我期望产生以下结果
+-------------+------------+-------+--------+
| employee_id | date | hours | payment|
+-------------+------------+-------+--------+
| 1 | 2018-01-01 | 8 | 40.0|
| 1 | 2018-01-02 | 8 | 40.0|
| 1 | 2018-01-03 | 8 | 40.0|
| 1 | 2018-01-04 | 8 | 40.0|
| 1 | 2018-01-05 | 8 | 40.0|
| 1 | 2018-01-08 | 8 | 40.0|
| 1 | 2018-01-09 | 8 | 40.0|
| 1 | 2018-01-10 | 8 | 88.0|
| 1 | 2018-01-11 | 8 | 88.0|
| 1 | 2018-01-12 | 8 | 88.0|
| 1 | 2018-01-15 | 8 | 96.0|
| 1 | 2018-01-16 | 8 | 96.0|
| 1 | 2018-01-17 | 8 | 96.0|
| 1 | 2018-01-18 | 8 | 104.0|
| 1 | 2018-01-19 | 8 | 104.0|
+-------------+------------+-------+--------+
一种方法使用相关子查询来获取速率:
select ew.*,
(ew.hours *
(select hr.hour_rate
from hour_rate hr
where hr.employee_id = ew.employee_id and
hr.from_date >= ew.date
order by hr.from_date
limit 1
)
) as daily_pay
from employee_work ew;
您可以通过在两个表中使用select来完成此操作。您的数据示例如下:
select ew.employee_id, ew.date, ew.hours, hr.employee_id, hr.from_date (hr.hour_rate * ew.hours) as payment
from employee_work ew, hour_rate hr
where ew.employee_id = hr.employee_id
您没有适用于2018-01-01至2018-01-09的起始日期,您是在应用默认值还是只是在示例中没有显示?@P.Salmon第四行是费率。输入的日期不是cosecuriveeew.date=hr.from\u date?并不是每一次约会都有收费。