15查找employees表所有emp_no为奇数

Posted 2020-11-25 guoyu1

1、题目描述：

查找employees表所有emp_no为奇数，且last_name不为Mary的员工信息，并按照hire_date逆序排列
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`));

输入描述:

无

输出描述:

emp_no	birth_date	first_name	last_name	gender	hire_date
10011	1953-11-07	Mary	Sluis	F	1990-01-22
10005	1955-01-21	Kyoichi	Maliniak	M	1989-09-12
10007	1957-05-23	Tzvetan	Zielinski	F	1989-02-10
10003	1959-12-03	Parto	Bamford	M	1986-08-28
10001	1953-09-02	Georgi	Facello	M	1986-06-26
10009	1952-04-19	Sumant	Peac	F	1985-02-18

 

2、代码：主要考察运算符和关系运算符在sql里的应用

select * 
from employees
where emp_no%2=1 and last_name!=‘Mary‘ 
order by hire_date desc;