在本教程中，我们将向您介绍在整个教程中使用的SQL示例数据库。以下数据库关系图 - HR 示例数据库：
在这个HR 示例数据库有7个表：
employees表存储员工的数据信息。
jobs表存储工作数据信息，包括职位和工资范围。
departments表存储部门数据信息。
dependents表存储员工的家属信息。
locations表存储公司各部门的所在位置信息。
countries表存储公司开展业务的国家/地区的数据。
regions表存储亚洲，欧洲，美洲，中东和非洲等地区的数据。 这些国家分为不同的地区。
下图显示了表名称及其记录数据数量。
通常，要使用SQL，需要安装关系数据库管理系统(RDBMS)。 如果您使用过MySQL，PostgreSQL，Oracle数据库，SQL Server或SQLite等关系数据库管理系统(RDBMS)，则可以使用以下对应脚本创建示例数据库。
1. MySQL以下SQL脚本是用于在MySQL中创建HR 示例数据库。
CREATE TABLE regions (
region_id INT (11) AUTO_INCREMENT PRIMARY KEY,
region_name VARCHAR (25) DEFAULT NULL
);
CREATE TABLE countries (
country_id CHAR (2) PRIMARY KEY,
country_name VARCHAR (40) DEFAULT NULL,
region_id INT (11) NOT NULL,
FOREIGN KEY (region_id) REFERENCES regions (region_id) ON DELETE CASCADE ON UPDATE CASCADE
);
CREATE TABLE locations (
location_id INT (11) AUTO_INCREMENT PRIMARY KEY,
street_address VARCHAR (40) DEFAULT NULL,
postal_code VARCHAR (12) DEFAULT NULL,
city VARCHAR (30) NOT NULL,
state_province VARCHAR (25) DEFAULT NULL,
country_id CHAR (2) NOT NULL,
FOREIGN KEY (country_id) REFERENCES countries (country_id) ON DELETE CASCADE ON UPDATE CASCADE
);
CREATE TABLE jobs (
job_id INT (11) AUTO_INCREMENT PRIMARY KEY,
job_title VARCHAR (35) NOT NULL,
min_salary DECIMAL (8, 2) DEFAULT NULL,
max_salary DECIMAL (8, 2) DEFAULT NULL
);
CREATE TABLE departments (
department_id INT (11) AUTO_INCREMENT PRIMARY KEY,
department_name VARCHAR (30) NOT NULL,
location_id INT (11) DEFAULT NULL,
FOREIGN KEY (location_id) REFERENCES locations (location_id) ON DELETE CASCADE ON UPDATE CASCADE
);
CREATE TABLE employees (
employee_id INT (11) AUTO_INCREMENT PRIMARY KEY,
first_name VARCHAR (20) DEFAULT NULL,
last_name VARCHAR (25) NOT NULL,
email VARCHAR (100) NOT NULL,
phone_number VARCHAR (20) DEFAULT NULL,
hire_date DATE NOT NULL,
job_id INT (11) NOT NULL,
salary DECIMAL (8, 2) NOT NULL,
manager_id INT (11) DEFAULT NULL,
department_id INT (11) DEFAULT NULL,
FOREIGN KEY (job_id) REFERENCES jobs (job_id) ON DELETE CASCADE ON UPDATE CASCADE,
FOREIGN KEY (department_id) REFERENCES departments (department_id) ON DELETE CASCADE ON UPDATE CASCADE,
FOREIGN KEY (manager_id) REFERENCES employees (employee_id)
);
CREATE TABLE dependents (
dependent_id INT (11) AUTO_INCREMENT PRIMARY KEY,
first_name VARCHAR (50) NOT NULL,
last_name VARCHAR (50) NOT NULL,
relationship VARCHAR (25) NOT NULL,
employee_id INT (11) NOT NULL,
FOREIGN KEY (employee_id) REFERENCES employees (employee_id) ON DELETE CASCADE ON UPDATE CASCADE
);
SQL
2. PostgreSQL以下脚本用于在PostgreSQL中创建HR 示例数据库结构。
CREATE TABLE regions (
region_id SERIAL PRIMARY KEY,
region_name CHARACTER VARYING (25)
);
CREATE TABLE countries (
country_id CHARACTER (2) PRIMARY KEY,
country_name CHARACTER VARYING (40),
region_id INTEGER NOT NULL,
FOREIGN KEY (region_id) REFERENCES regions (region_id) ON UPDATE CASCADE ON DELETE CASCADE
);
CREATE TABLE locations (
location_id SERIAL PRIMARY KEY,
street_address CHARACTER VARYING (40),
postal_code CHARACTER VARYING (12),
city CHARACTER VARYING (30) NOT NULL,
state_province CHARACTER VARYING (25),
country_id CHARACTER (2) NOT NULL,
FOREIGN KEY (country_id) REFERENCES countries (country_id) ON UPDATE CASCADE ON DELETE CASCADE
);
CREATE TABLE departments (
department_id SERIAL PRIMARY KEY,
department_name CHARACTER VARYING (30) NOT NULL,
location_id INTEGER,
FOREIGN KEY (location_id) REFERENCES locations (location_id) ON UPDATE CASCADE ON DELETE CASCADE
);
CREATE TABLE jobs (
job_id SERIAL PRIMARY KEY,
job_title CHARACTER VARYING (35) NOT NULL,
min_salary NUMERIC (8, 2),
max_salary NUMERIC (8, 2)
);
CREATE TABLE employees (
employee_id SERIAL PRIMARY KEY,
first_name CHARACTER VARYING (20),
last_name CHARACTER VARYING (25) NOT NULL,
email CHARACTER VARYING (100) NOT NULL,
phone_number CHARACTER VARYING (20),
hire_date DATE NOT NULL,
job_id INTEGER NOT NULL,
salary NUMERIC (8, 2) NOT NULL,
manager_id INTEGER,
department_id INTEGER,
FOREIGN KEY (job_id) REFERENCES jobs (job_id) ON UPDATE CASCADE ON DELETE CASCADE,
FOREIGN KEY (department_id) REFERENCES departments (department_id) ON UPDATE CASCADE ON DELETE CASCADE,
FOREIGN KEY (manager_id) REFERENCES employees (employee_id) ON UPDATE CASCADE ON DELETE CASCADE
);
CREATE TABLE dependents (
dependent_id SERIAL PRIMARY KEY,
first_name CHARACTER VARYING (50) NOT NULL,
last_name CHARACTER VARYING (50) NOT NULL,
relationship CHARACTER VARYING (25) NOT NULL,
employee_id INTEGER NOT NULL,
FOREIGN KEY (employee_id) REFERENCES employees (employee_id) ON DELETE CASCADE ON UPDATE CASCADE
);
SQL
3. Microsoft SQL Server以下脚本用于在Microsoft SQL Server中创建HR 示例数据库结构。
CREATE TABLE regions (
region_id INT IDENTITY(1,1) PRIMARY KEY,
region_name VARCHAR (25) DEFAULT NULL
);
CREATE TABLE countries (
country_id CHAR (2) PRIMARY KEY,
country_name VARCHAR (40) DEFAULT NULL,
region_id INT NOT NULL,
FOREIGN KEY (region_id) REFERENCES regions (region_id) ON DELETE CASCADE ON UPDATE CASCADE
);
CREATE TABLE locations (
location_id INT IDENTITY(1,1) PRIMARY KEY,
street_address VARCHAR (40) DEFAULT NULL,
postal_code VARCHAR (12) DEFAULT NULL,
city VARCHAR (30) NOT NULL,
state_province VARCHAR (25) DEFAULT NULL,
country_id CHAR (2) NOT NULL,
FOREIGN KEY (country_id) REFERENCES countries (country_id) ON DELETE CASCADE ON UPDATE CASCADE
);
CREATE TABLE jobs (
job_id INT IDENTITY(1,1) PRIMARY KEY,
job_title VARCHAR (35) NOT NULL,
min_salary DECIMAL (8, 2) DEFAULT NULL,
max_salary DECIMAL (8, 2) DEFAULT NULL
);
CREATE TABLE departments (
department_id INT IDENTITY(1,1) PRIMARY KEY,
department_name VARCHAR (30) NOT NULL,
location_id INT DEFAULT NULL,
FOREIGN KEY (location_id) REFERENCES locations (location_id) ON DELETE CASCADE ON UPDATE CASCADE
);
CREATE TABLE employees (
employee_id INT IDENTITY(1,1) PRIMARY KEY,
first_name VARCHAR (20) DEFAULT NULL,
last_name VARCHAR (25) NOT NULL,
email VARCHAR (100) NOT NULL,
phone_number VARCHAR (20) DEFAULT NULL,
hire_date DATE NOT NULL,
job_id INT NOT NULL,
salary DECIMAL (8, 2) NOT NULL,
manager_id INT DEFAULT NULL,
department_id INT DEFAULT NULL,
FOREIGN KEY (job_id) REFERENCES jobs (job_id) ON DELETE CASCADE ON UPDATE CASCADE,
FOREIGN KEY (department_id) REFERENCES departments (department_id) ON DELETE CASCADE ON UPDATE CASCADE,
FOREIGN KEY (manager_id) REFERENCES employees (employee_id)
);
CREATE TABLE dependents (
dependent_id INT IDENTITY(1,1) PRIMARY KEY,
first_name VARCHAR (50) NOT NULL,
last_name VARCHAR (50) NOT NULL,
relationship VARCHAR (25) NOT NULL,
employee_id INT NOT NULL,
FOREIGN KEY (employee_id) REFERENCES employees (employee_id) ON DELETE CASCADE ON UPDATE CASCADE
);
SQL
4. Oracle数据库(> 12c)以下脚本用于在Oracle Database 12c中创建HR 示例数据库结构。
CREATE TABLE regions (
region_id NUMBER GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
region_name VARCHAR2 (25) DEFAULT NULL
);
CREATE TABLE countries (
country_id CHAR (2) PRIMARY KEY,
country_name VARCHAR2 (40) DEFAULT NULL,
region_id NUMBER NOT NULL,
FOREIGN KEY (region_id) REFERENCES regions (region_id) ON DELETE CASCADE
);
CREATE TABLE locations (
location_id NUMBER GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
street_address VARCHAR2 (40) DEFAULT NULL,
postal_code VARCHAR2 (12) DEFAULT NULL,
city VARCHAR2 (30) NOT NULL,
state_province VARCHAR2 (25) DEFAULT NULL,
country_id CHAR (2) NOT NULL,
FOREIGN KEY (country_id) REFERENCES countries (country_id) ON DELETE CASCADE
);
CREATE TABLE jobs (
job_id NUMBER GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
job_title VARCHAR2 (35) NOT NULL,
min_salary NUMBER (8, 2) DEFAULT NULL,
max_salary NUMBER (8, 2) DEFAULT NULL
);
CREATE TABLE departments (
department_id NUMBER GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
department_name VARCHAR2 (30) NOT NULL,
location_id NUMBER DEFAULT NULL,
FOREIGN KEY (location_id) REFERENCES locations (location_id) ON DELETE CASCADE
);
CREATE TABLE employees (
employee_id NUMBER GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
first_name VARCHAR2 (20) DEFAULT NULL,
last_name VARCHAR2 (25) NOT NULL,
email VARCHAR2 (100) NOT NULL,
phone_number VARCHAR2 (20) DEFAULT NULL,
hire_date DATE NOT NULL,
job_id NUMBER NOT NULL,
salary NUMBER (8, 2) NOT NULL,
manager_id NUMBER DEFAULT NULL,
department_id NUMBER DEFAULT NULL,
FOREIGN KEY (job_id) REFERENCES jobs (job_id) ON DELETE CASCADE,
FOREIGN KEY (department_id) REFERENCES departments (department_id) ON DELETE CASCADE,
FOREIGN KEY (manager_id) REFERENCES employees (employee_id)
);
CREATE TABLE dependents (
dependent_id NUMBER GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
first_name VARCHAR2 (50) NOT NULL,
last_name VARCHAR2 (50) NOT NULL,
relationship VARCHAR2 (25) NOT NULL,
employee_id NUMBER NOT NULL,
FOREIGN KEY (employee_id) REFERENCES employees (employee_id) ON DELETE CASCADE
);
SQL
5. SQLite以下脚本用于在SQLite中创建HR 示例数据库结构。
CREATE TABLE regions (
region_id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
region_name text NOT NULL
);
CREATE TABLE countries (
country_id text NOT NULL,
country_name text NOT NULL,
region_id INTEGER NOT NULL,
PRIMARY KEY (country_id ASC),
FOREIGN KEY (region_id) REFERENCES regions (region_id) ON DELETE CASCADE ON UPDATE CASCADE
);
CREATE TABLE locations (
location_id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
street_address text,
postal_code text,
city text NOT NULL,
state_province text,
country_id INTEGER NOT NULL,
FOREIGN KEY (country_id) REFERENCES countries (country_id) ON DELETE CASCADE ON UPDATE CASCADE
);
CREATE TABLE departments (
department_id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
department_name text NOT NULL,
location_id INTEGER NOT NULL,
FOREIGN KEY (location_id) REFERENCES locations (location_id) ON DELETE CASCADE ON UPDATE CASCADE
);
CREATE TABLE jobs (
job_id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
job_title text NOT NULL,
min_salary double NOT NULL,
max_salary double NOT NULL
);
CREATE TABLE employees (
employee_id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
first_name text,
last_name text NOT NULL,
email text NOT NULL,
phone_number text,
hire_date text NOT NULL,
job_id INTEGER NOT NULL,
salary double NOT NULL,
manager_id INTEGER,
department_id INTEGER NOT NULL,
FOREIGN KEY (job_id) REFERENCES jobs (job_id) ON DELETE CASCADE ON UPDATE CASCADE,
FOREIGN KEY (department_id) REFERENCES departments (department_id) ON DELETE CASCADE ON UPDATE CASCADE,
FOREIGN KEY (manager_id) REFERENCES employees (employee_id) ON DELETE CASCADE ON UPDATE CASCADE
);
CREATE TABLE dependents (
dependent_id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
first_name text NOT NULL,
last_name text NOT NULL,
relationship text NOT NULL,
employee_id INTEGER NOT NULL,
FOREIGN KEY (employee_id) REFERENCES employees (employee_id) ON DELETE CASCADE ON UPDATE CASCADE
);
SQL
6. 导入数据以下脚本用于将数据加载到上面HR示例数据库创建的表中。
/*Data for the table regions */
INSERT INTO regions(region_id,region_name) VALUES (1,'欧洲');
INSERT INTO regions(region_id,region_name) VALUES (2,'美洲');
INSERT INTO regions(region_id,region_name) VALUES (3,'亚洲');
INSERT INTO regions(region_id,region_name) VALUES (4,'中东和非洲');
/*Data for the table countries */
INSERT INTO countries(country_id,country_name,region_id) VALUES ('AR','阿根廷',2);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('AU','澳大利亚',3);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('BE','比利时',1);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('BR','巴西',2);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('CA','加拿大',2);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('CH','瑞士',1);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('CN','中国',3);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('DE','德国',1);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('DK','丹麦',1);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('EG','埃及',4);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('FR','法国',1);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('HK','香港',3);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('IL','以色列',4);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('IN','印度',3);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('IT','意大利',1);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('JP','日本',3);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('KW','科威特',4);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('MX','墨西哥',2);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('NG','尼日利亚',4);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('NL','荷兰',1);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('SG','新加坡',3);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('UK','英国',1);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('US','美国',2);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('ZM','赞比亚',4);
INSERT INTO countries(country_id,country_name,region_id) VALUES ('ZW','津巴布韦',4);
/*Data for the table locations */
INSERT INTO locations(location_id,street_address,postal_code,city,state_province,country_id) VALUES (1400,'2014 Jabberwocky Rd','26192','Southlake','Texas','US');
INSERT INTO locations(location_id,street_address,postal_code,city,state_province,country_id) VALUES (1500,'2011 Interiors Blvd','99236','South San Francisco','California','US');
INSERT INTO locations(location_id,street_address,postal_code,city,state_province,country_id) VALUES (1700,'2004 Charade Rd','98199','Seattle','Washington','US');
INSERT INTO locations(location_id,street_address,postal_code,city,state_province,country_id) VALUES (1800,'147 Spadina Ave','M5V 2L7','Toronto','Ontario','CA');
INSERT INTO locations(location_id,street_address,postal_code,city,state_province,country_id) VALUES (2400,'8204 Arthur St',NULL,'London',NULL,'UK');
INSERT INTO locations(location_id,street_address,postal_code,city,state_province,country_id) VALUES (2500,'Magdalen Centre, The Oxford Science Park','OX9 9ZB','Oxford','Oxford','UK');
INSERT INTO locations(location_id,street_address,postal_code,city,state_province,country_id) VALUES (2700,'Schwanthalerstr. 7031','80925','Munich','Bavaria','DE');
/*Data for the table jobs */
INSERT INTO jobs(job_id,job_title,min_salary,max_salary) VALUES (1,'会计师',4200.00,9000.00);
INSERT INTO jobs(job_id,job_title,min_salary,max_salary) VALUES (2,'会计经理',8200.00,16000.00);
INSERT INTO jobs(job_id,job_title,min_salary,max_salary) VALUES (3,'行政助理',3000.00,6000.00);
INSERT INTO jobs(job_id,job_title,min_salary,max_salary) VALUES (4,'主席',20000.00,40000.00);
INSERT INTO jobs(job_id,job_title,min_salary,max_salary) VALUES (5,'行政副主席',15000.00,30000.00);
INSERT INTO jobs(job_id,job_title,min_salary,max_salary) VALUES (6,'会计',4200.00,9000.00);
INSERT INTO jobs(job_id,job_title,min_salary,max_salary) VALUES (7,'财务经理',8200.00,16000.00);
INSERT INTO jobs(job_id,job_title,min_salary,max_salary) VALUES (8,'人力资源代表',4000.00,9000.00);
INSERT INTO jobs(job_id,job_title,min_salary,max_salary) VALUES (9,'程序员',4000.00,10000.00);
INSERT INTO jobs(job_id,job_title,min_salary,max_salary) VALUES (10,'市场经理',9000.00,15000.00);
INSERT INTO jobs(job_id,job_title,min_salary,max_salary) VALUES (11,'市场代表',4000.00,9000.00);
INSERT INTO jobs(job_id,job_title,min_salary,max_salary) VALUES (12,'公关代表',4500.00,10500.00);
INSERT INTO jobs(job_id,job_title,min_salary,max_salary) VALUES (13,'采购职员',2500.00,5500.00);
INSERT INTO jobs(job_id,job_title,min_salary,max_salary) VALUES (14,'采购经理',8000.00,15000.00);
INSERT INTO jobs(job_id,job_title,min_salary,max_salary) VALUES (15,'销售经理',10000.00,20000.00);
INSERT INTO jobs(job_id,job_title,min_salary,max_salary) VALUES (16,'销售代表',6000.00,12000.00);
INSERT INTO jobs(job_id,job_title,min_salary,max_salary) VALUES (17,'运输职员',2500.00,5500.00);
INSERT INTO jobs(job_id,job_title,min_salary,max_salary) VALUES (18,'库存职员',2000.00,5000.00);
INSERT INTO jobs(job_id,job_title,min_salary,max_salary) VALUES (19,'库存管理',5500.00,8500.00);
/*Data for the table departments */
INSERT INTO departments(department_id,department_name,location_id) VALUES (1,'管理',1700);
INSERT INTO departments(department_id,department_name,location_id) VALUES (2,'市场营销',1800);
INSERT INTO departments(department_id,department_name,location_id) VALUES (3,'采购',1700);
INSERT INTO departments(department_id,department_name,location_id) VALUES (4,'人力资源',2400);
INSERT INTO departments(department_id,department_name,location_id) VALUES (5,'运输',1500);
INSERT INTO departments(department_id,department_name,location_id) VALUES (6,'IT',1400);
INSERT INTO departments(department_id,department_name,location_id) VALUES (7,'公共关系',2700);
INSERT INTO departments(department_id,department_name,location_id) VALUES (8,'销售',2500);
INSERT INTO departments(department_id,department_name,location_id) VALUES (9,'行政人员',1700);
INSERT INTO departments(department_id,department_name,location_id) VALUES (10,'财务',1700);
INSERT INTO departments(department_id,department_name,location_id) VALUES (11,'会计',1700);
/*Data for the table employees */
INSERT INTO employees VALUES ('100', 'Steven', 'Lee', 'steven.lee@yiibai.com', '0532-86011111', '1987-06-17', '4', '24000.00', null, '9');
INSERT INTO employees VALUES ('101', 'Neena', 'Wong', 'neena.wong@kaops.com', '0551-4243311', '1989-09-21', '5', '17000.00', '100', '9');
INSERT INTO employees VALUES ('102', 'Lex', 'Liang', 'lex.liang@kaops.com', '0571-87622362', '1993-01-13', '5', '17000.00', '100', '9');
INSERT INTO employees VALUES ('103', 'Alexander', 'Lee', 'alexander.lee@kaops.com', '020-95105105', '1990-01-03', '9', '9000.00', '102', '6');
INSERT INTO employees VALUES ('104', 'Bruce', 'Wong', 'bruce.wong@yiibai.com', '0371-68356666', '1991-05-21', '9', '6000.00', '103', '6');
INSERT INTO employees VALUES ('105', 'David', 'Liang', 'david.liang@kaops.com', '0512-67513131', '1997-06-25', '9', '4800.00', '103', '6');
INSERT INTO employees VALUES ('106', 'Valli', 'Chen', 'valli.chen@yiibai.com', '0535-95105175', '1998-02-05', '9', '4800.00', '103', '6');
INSERT INTO employees VALUES ('107', 'Diana', 'Chen', 'diana.chen@yiibai.com', '025-95105105', '1999-02-07', '9', '4200.00', '103', '6');
INSERT INTO employees VALUES ('108', 'Nancy', 'Chen', 'nancy.chen@yiibai.com', '0531-86012520', '1994-08-17', '7', '12000.00', '101', '10');
INSERT INTO employees VALUES ('109', 'Daniel', 'Chen', 'daniel.chen@yiibai.com', '021-8008207890', '1994-08-16', '6', '9000.00', '108', '10');
INSERT INTO employees VALUES ('110', 'John', 'Chen', 'john.chen@yiibai.com', '0592-2088888', '1997-09-28', '6', '8200.00', '108', '10');
INSERT INTO employees VALUES ('111', 'Ismael', 'Su', 'ismael.su@yiibai.com', '029-95105688', '1997-09-30', '6', '7700.00', '108', '10');
INSERT INTO employees VALUES ('112', 'Max', 'Su', 'max.su@yiibai.com', '021-95105105', '1998-03-07', '6', '7800.00', '108', '10');
INSERT INTO employees VALUES ('113', 'Min', 'Su', 'min.su@yiibai.com', '027-88068888', '1999-12-07', '6', '6900.00', '108', '10');
INSERT INTO employees VALUES ('114', 'Avg', 'Su', 'avg.su@yiibai.com', '0755-82328647', '1994-12-07', '14', '11000.00', '100', '3');
INSERT INTO employees VALUES ('115', 'Alexander', 'Su', 'alexander.su@yiibai.com', '0431-86122222', '1995-05-18', '13', '3100.00', '114', '3');
INSERT INTO employees VALUES ('116', 'Shelli', 'Zhang', 'shelli.zhang@kaops.com', '0771-2222222', '1997-12-24', '13', '2900.00', '114', '3');
INSERT INTO employees VALUES ('117', 'Sigal', 'Zhang', 'sigal.zhang@yiibai.com', '0791-6101074', '1997-07-24', '13', '2800.00', '114', '3');
INSERT INTO employees VALUES ('118', 'Guy', 'Zhang', 'guy.zhang@kaops.com', '0411-82603331', '1998-11-15', '13', '2600.00', '114', '3');
INSERT INTO employees VALUES ('119', 'Karen', 'Zhang', 'karen.zhang@yiibai.com', '010-51019999', '1999-08-10', '13', '2500.00', '114', '3');
INSERT INTO employees VALUES ('120', 'Matthew', 'Han', 'matthew.Han@yiibai.com', '0574-56163111', '1996-07-18', '19', '8000.00', '100', '5');
INSERT INTO employees VALUES ('121', 'Max', 'Han', 'Max.han@yiibai.com', '0731-2637122', '1997-04-10', '19', '8200.00', '100', '5');
INSERT INTO employees VALUES ('122', 'Min', 'Liu', 'Min.liu@yiibai.com', '023-63862607', '1995-05-01', '19', '7900.00', '100', '5');
INSERT INTO employees VALUES ('123', 'Shanta', 'Liu', 'shanta.liu@yiibai.com', '311-87600111', '1997-10-10', '19', '6500.00', '100', '5');
INSERT INTO employees VALUES ('126', 'Irene', 'Liu', 'irene.liu@kaops.com', '0752-95105688', '1998-09-28', '18', '2700.00', '120', '5');
INSERT INTO employees VALUES ('145', 'John', 'Liu', 'john.liu@yiibai.com', null, '1996-10-01', '15', '14000.00', '100', '8');
INSERT INTO employees VALUES ('146', 'Karen', 'Liu', 'karen.liu@yiibai.com', null, '1997-01-05', '15', '13500.00', '100', '8');
INSERT INTO employees VALUES ('176', 'Jonathon', 'Yang', 'jonathon.yang@yiibai.com', null, '1998-03-24', '16', '8600.00', '100', '8');
INSERT INTO employees VALUES ('177', 'Jack', 'Yang', 'jack.yang@yiibai.com', null, '1998-04-23', '16', '8400.00', '100', '8');
INSERT INTO employees VALUES ('178', 'Kimberely', 'Yang', 'kimberely.yang@yiibai.com', null, '1999-05-24', '16', '7000.00', '100', '8');
INSERT INTO employees VALUES ('179', 'Charles', 'Yang', 'charles.yang@yiibai.com', null, '2000-01-04', '16', '6200.00', '100', '8');
INSERT INTO employees VALUES ('192', 'Sarah', 'Yang', 'sarah.yang@kaops.com', '0351-2233611', '1996-02-04', '17', '4000.00', '123', '5');
INSERT INTO employees VALUES ('193', 'Britney', 'Zhao', 'britney.zhao@yiibai.com', '0351-2233611', '1997-03-03', '17', '3900.00', '123', '5');
INSERT INTO employees VALUES ('200', 'Jennifer', 'Zhao', 'jennifer.zhao@yiibai.com', '021-66050000', '1987-09-17', '3', '4400.00', '101', '1');
INSERT INTO employees VALUES ('201', 'Michael', 'Zhou', 'michael.zhou@yiibai.com', '010-67237328', '1996-02-17', '10', '13000.00', '100', '2');
INSERT INTO employees VALUES ('202', 'Pat', 'Zhou', 'pat.zhou@yiibai.com', '0755-28114518', '1997-08-17', '11', '6000.00', '201', '2');
INSERT INTO employees VALUES ('203', 'Susan', 'Zhou', 'susan.zhou@yiibai.com', '0755-83587526', '1994-06-07', '8', '6500.00', '101', '4');
INSERT INTO employees VALUES ('204', 'Hermann', 'Wu', 'hermann.wu@yiibai.com', '0513-83512816', '1994-06-07', '12', '10000.00', '101', '7');
INSERT INTO employees VALUES ('205', 'Shelley', 'Wu', 'shelley.wu@yiibai.com', '0898-31686222', '1994-06-07', '2', '12000.00', '101', '11');
INSERT INTO employees VALUES ('206', 'William', 'Wu', 'william.wu@yiibai.com', '022-26144822', '1994-06-07', '1', '8300.00', '205', '11');
/*Data for the table dependents */
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (1,'Penelope','Wu','Child',206);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (2,'Nick','Wu','Child',205);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (3,'Ed','Zhao','Child',200);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (4,'Jennifer','Lee','Child',100);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (5,'Johnny','Wong','Child',101);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (6,'Bette','Liang','Child',102);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (7,'Grace','Chen','Child',109);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (8,'Matthew','Chen','Child',110);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (9,'Joe','Su','Child',111);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (10,'Christian','Su','Child',112);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (11,'Zero','Su','Child',113);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (12,'Karl','Chen','Child',108);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (13,'Uma','Zhou','Child',203);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (14,'Vivien','Lee','Child',103);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (15,'Cuba','Wong','Child',104);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (16,'Fred','Liang','Child',105);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (17,'Helen','Chen','Child',106);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (18,'Dan','Chen','Child',107);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (19,'Bob','Zhou','Child',201);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (20,'Lucille','Zhou','Child',202);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (21,'Kirsten','Wu','Child',204);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (22,'Elvis','Su','Child',115);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (23,'Sandra','Zhang','Child',116);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (24,'Cameron','Zhang','Child',117);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (25,'Kevin','Zhang','Child',118);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (26,'Rip','Zhang','Child',119);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (27,'Julia','Su','Child',114);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (28,'Woody','Liu','Child',145);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (29,'Alec','Liu','Child',146);
INSERT INTO dependents(dependent_id,first_name,last_name,relationship,employee_id) VALUES (30,'Sandra','Yang','Child',176);
SQL
7. 删除表以下是用于刷新示例数据库时，删除所有表的脚本。
DROP TABLE employees;
DROP TABLE dependents;
DROP TABLE departments;
DROP TABLE locations;
DROP TABLE countries;
DROP TABLE regions;
DROP TABLE jobs;
