create table department(
-> depart_id int primary key auto_increment comment '部門(mén)編號(hào)',
-> depart_name varchar(50) not null comment '部門(mén)名稱(chēng)'
-> ) auto_increment=1001;

create table employee( n for the right syntax to use near 'redsodsnvjnv' at line 1
-> emp_num int primary key auto_increment comment '員工編號(hào)',
-> emp_name varchar(30) not null comment '員工姓名',
-> emp_job varchar(30) not null comment '員工崗位',
-> hire_data datetime not null comment '入職時(shí)間',
-> salary int not null comment '薪資',
-> bonus int not null comment '獎(jiǎng)金',
-> dept_id int comment '部門(mén)編號(hào)'
-> );

alter table employee add constraint emp_dept_fk foreign key(dept_id) references department(depart_id);

insert into department values(null,'科技部門(mén)'),(null,'法律部門(mén)'),(null,'后勤部門(mén)'),(null,'財(cái)務(wù)部門(mén)');

insert into employee values((null,'張三','工程師','2023.9.1',12000,1000,1001),(null,'張四','工程師','2023.9.1',11000,1010,1001),(null,'李三','會(huì)計(jì)','2023.9.1',5000,300,1004),(null,'張六','保安','2023.9.1',5000,500,1003),(null,'劉律','律師','2023.9.1',1000,1,1002);

delete from employee where emp_name='那個(gè)';

select dept_id,avg(salary) from employee group by dept_id;

select dept_id, avg((salary+bonus)*12) from employee group by dept_id;

select dept_id,max(salary) from employee group by dept_id;

select dept_id,min(salary) from employee group by dept_id;

select dept_id,sum(salary) from employee group by dept_id;

select dept_id,count(*) from employee group by dept_id;

select dept_ip,count(emp_name) from employee group by dept_id;

select emp_name,dept_id from employee order by dept_id;

select dept_id,emp_job,sum(salary) from employee group by dept_id, emp_job;

select dept_id,emp_job,sum(salary) from employee group by dept_id,emp_job having sum(salary>1000);

select * from employee limit 0,3;

select * from employee limit 2,7;