SQL，判断获取的数字是奇数还是偶数

题目描述

查找employees表所有emp_no为奇数，且last_name不为Mary(注意大小写)的员工信息，并按照hire_date逆序排列(题目不能使用mod函数)
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`));

如插入：

INSERT INTO employees VALUES(10001,'1953-09-02','Georgi','Facello','M','1986-06-26');
INSERT INTO employees VALUES(10002,'1964-06-02','Bezalel','Simmel','F','1985-11-21');
INSERT INTO employees VALUES(10003,'1959-12-03','Parto','Bamford','M','1986-08-28');
INSERT INTO employees VALUES(10004,'1954-05-01','Chirstian','Koblick','M','1986-12-01');
INSERT INTO employees VALUES(10005,'1955-01-21','Kyoichi','Maliniak','M','1989-09-12');
INSERT INTO employees VALUES(10006,'1953-04-20','Anneke','Preusig','F','1989-06-02');
INSERT INTO employees VALUES(10007,'1957-05-23','Tzvetan','Zielinski','F','1989-02-10');
INSERT INTO employees VALUES(10008,'1958-02-19','Saniya','Kalloufi','M','1994-09-15');
INSERT INTO employees VALUES(10009,'1952-04-19','Sumant','Peac','F','1985-02-18');
INSERT INTO employees VALUES(10010,'1963-06-01','Duangkaew','Piveteau','F','1989-08-24');
INSERT INTO employees VALUES(10011,'1953-11-07','Mary','Sluis','F','1990-01-22');

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

示例1

方法1：使用（%,如：ID是奇数：studentid%=1;ID是偶数：studentid%=0）

select a.*
from employees a
where (a.emp_no%2= 1) and
last_name <> 'Mary'
order by a.hire_date desc;

方法2：使用 & 1

select a.*
from employees a
where (a.emp_no & 1) and
last_name <> 'Mary'
order by a.hire_date desc;

方法3:使用mod()

select a.*
from employees a
where mod(a.emp_no,2) = 1 and
last_name <> 'Mary'
order by a.hire_date desc;