MySQL/第四章、练习题.sql

#第四章练习题
SELECT * FROM employees;
#1、选择工资不再5000到12000的员工的姓名和工资
SELECT last_name,salary
FROM employees
#WHERE salary < 5000 OR salary > 12000;
WHERE salary 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;
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,manager_id
FROM employees
#WHERE manager_id <=> NULL;
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 NOT commission_pct IS NULL;
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%' AND last_name LIKE '%K%';

#7、显示出表employees表中first_name以'e'结尾的员工信息
SELECT *
FROM employees
#WHERE first_name LIKE '%e';
WHERE first_name REGEXP '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 BETWEEN 80 AND 100;
WHERE department_id >= 80 AND department_id <= 100;

#9、显示出表employees的manager_id是100,101,110的员工姓名、工资、管理者id
SELECT last_name,salary,manager_id
FROM employees
WHERE manager_id IN(100,101,110);