SELECT last_name,salary
FROM employees
WHERE salary < 5000 OR salary > 12000;
SELECT last_name,salary
FROM employees
WHERE NOT BETWEEN 5000 AND 12000;
2.选择在20或50号部门工作的员工姓名和部门号
SELECT last_name,department_id
FROM employees
WHERE department_id = 20 OR department_id = 50;
SELECT last_name,department_id
FROM employees
WHERE department_id IN(20, 50);
3.选择公司中没有管理者的员工姓名及job_id
SELECT last_name,job_id
FROM employees
WHERE manager_id <=> NULL;
SELECT last_name,job_id
FROM employees
WHERE manager_id IS NULL;
4.选择公司中有奖金的员工姓名,工资和奖金级别
SELECT last_name,salary,commission_pct
FROM employees
WHERE commission_pct IS NOT NULL;
5.选择员工姓名的第三个字母是a的员工姓名
SELECT last_name
FROM employees
WHERE last_name
LIKE '__a%';
6.选择姓名中有字母a和k的员工姓名
SELECT last_name
FROM employees
WHERE last_name LIKE '%a%k%' OR last_name LIKE '%k%a%';
7.显示出表 employees 表中 first_name 以 'e’结尾的员工信息
SELECT employee_id,first_name,last_name
FROM employees
WHERE first_name LIKE '%e';
8.显示出表 employees 部门编号在 80-100 之间的姓名、工种
SELECT last_name,job_id
FROM employees
WHERE department_id IN(80, 100);
SELECT last_name,job_id
FROM employees
WHERE department_id BETWEEN 80 AND 100;
SELECT last_name,salary,manager_id
FROM employees
WHERE manager_id = 100
OR manager_id = 101
OR manager_id = 110;
SELECT last_name,salary,manager_id
FROM employees
WHERE manager_id IN (100,101,110);