报销流程中的建表sql语句（mysql）

create database dbFirstJBPM;
use dbFirstJBPM;

create table tb_user(
 user_id  MEDIUMINT NOT NULL AUTO_INCREMENT,
 user_name VARCHAR(30),
 user_password VARCHAR(30),
 user_type int,
 PRIMARY KEY (user_id)
);

create table tb_baoxiao(
 baoxiao_id MEDIUMINT NOT NULL AUTO_INCREMENT,
 baoxiao_title VARCHAR(30),
 baoxiao_memo VARCHAR(30),
 user_id  MEDIUMINT,
 baoxiao_data DATETIME,
 baoxiao_flag int,
 PRIMARY KEY (baoxiao_id)
);

create table tb_baoxiao_item(
 item_id  MEDIUMINT NOT NULL AUTO_INCREMENT,
 item_name VARCHAR(30),
 item_money VARCHAR(100),
 item_memo VARCHAR(200),
 baoxiao_id MEDIUMINT,
 PRIMARY KEY (item_id)
);

create table tb_approve(
 approve_id MEDIUMINT NOT NULL AUTO_INCREMENT,
 user_id  MEDIUMINT,
 baoxiao_id MEDIUMINT,
 approve_result VARCHAR(30),
 approve_memo VARCHAR(30),
 approve_date DATETIME,
 PRIMARY KEY (approve_id)
);

alter table tb_baoxiao add index baoxiao_foreign_key (user_id),
add CONSTRAINT baoxiao_foreign_key
FOREIGN KEY (user_id)
REFERENCES tb_user(user_id);

alter table tb_baoxiao_item add index baoxiao_item_foreign_key (baoxiao_id),
add CONSTRAINT baoxiao_item_foreign_key
FOREIGN KEY (baoxiao_id)
REFERENCES tb_baoxiao(baoxiao_id);

alter table tb_approve add index approve_user_foreign_key (user_id),
add CONSTRAINT approve_user_foreign_key
FOREIGN KEY (user_id)
REFERENCES tb_user(user_id);

alter table tb_approve add index approve_baoxiao_foreign_key (baoxiao_id),
add CONSTRAINT approve_baoxiao_foreign_key
FOREIGN KEY (baoxiao_id)
REFERENCES tb_baoxiao(baoxiao_id);

insert into tb_user(user_name,user_password,user_type)
values('test','test',0),('manager','manager',1),('boss','boss',2);