有一个员工表employees简况如下: emp_no birth_date first_name last_name gender hire_date 10001 1953-09-02 Georgi Facello M 2001-06-22 10002 1964-06-02 Bezalel Simmel F 1999-08-03 有一个薪水表salaries简况如下: emp_no salary from_date to_date 10001 85097 2001-06-22 2002-06-22 10001 88958 2002-06-22 9999-01-01 10002 72527 1999-08-03 2000-08-02 10002 72527 2000-08-02 2001-08-02 请你查找在职员工自入职以来的薪水涨幅情况(注意这里强调的是在职员工)，给出在职员工编号emp_no以及其对应的薪水涨幅growth，并按照growth进行升序，以上例子输出为 （注: to_date为薪资调整某个结束日期，或者为离职日期，to_date='9999-01-01'时，表示依然在职，无后续调整记录） emp_no growth 10001 3861
示例1
输入
drop table if exists `employees` ;
drop table if exists `salaries` ;
CREATE TABLE `employees` (
`emp_no` int(11) NOT NULL,
`birth_date` date NOT NULL,
`first_name` varchar(14) NOT NULL,
`last_name` varchar(16) NOT NULL,
`gender` char(1) NOT NULL,
`hire_date` date NOT NULL,
PRIMARY KEY (`emp_no`));
CREATE TABLE `salaries` (
`emp_no` int(11) NOT NULL,
`salary` int(11) NOT NULL,
`from_date` date NOT NULL,
`to_date` date NOT NULL,
PRIMARY KEY (`emp_no`,`from_date`));
INSERT INTO employees VALUES(10001,'1953-09-02','Georgi','Facello','M','2001-06-22');
INSERT INTO employees VALUES(10002,'1964-06-02','Bezalel','Simmel','F','1999-08-03');
INSERT INTO salaries VALUES(10001,85097,'2001-06-22','2002-06-22');
INSERT INTO salaries VALUES(10001,88958,'2002-06-22','9999-01-01');
INSERT INTO salaries VALUES(10002,72527,'1999-08-03','2000-08-02');
INSERT INTO salaries VALUES(10002,72527,'2000-08-02','2001-08-02');
加载中...