python原生操作mysql

import pymysql

HOST = '127.0.0.1'
PORT = 3306
USER = 'root'
PASSWD = '123456'
DB = 'test'
CHARSET = 'utf8'

conn = pymysql.connect(
    host=HOST,
    port=PORT,
    user=USER,
    passwd=PASSWD,
    db=DB,
    charset=CHARSET
)

cursor = conn.cursor()

create_dep = """CREATE TABLE department(
dep_id INT PRIMARY KEY,
dep_name VARCHAR(20) NOT NULL UNIQUE 
)"""

create_emps = """CREATE TABLE employees(
emp_id INT PRIMARY KEY,
emp_name VARCHAR(20) NOT NULL UNIQUE,
birth_date DATE,
email VARCHAR(30),
dep_id INT,
FOREIGN KEY(dep_id) REFERENCES department(dep_id)
)"""

create_slary = """CREATE TABLE slary(
auto_id INT PRIMARY KEY,
date DATE,
basic INT,
awards INT,
emp_id INT,
FOREIGN KEY(emp_id) REFERENCES employees(emp_id)
)"""

# cursor.execute(create_dep)
# cursor.execute(create_emps)
# cursor.execute(create_slary)

# insert = 'insert into department VALUES (%s,%s)'
# cursor.execute(insert,(1,'HR'))
# cursor.execute(insert,(2,'DEVOPS'))
# cursor.execute(insert,(3,'DEV'))
# cursor.executemany(insert,[(4,'OPS'),(5,'MANAGER')])



# select = 'select * from department order by dep_id'
# cursor.execute(select)
# result = cursor.fetchone()
# print(result)
# result = cursor.fetchmany(2)
# print(result)
# result = cursor.fetchall()
# print(result)

# select = 'select * from department order by dep_id'
# cursor.execute(select)
# cursor.scroll(4)  # 默认以相对方式，从当前位置向下移动
# result = cursor.fetchone()
# print(result)
# cursor.scroll(0,mode='absolute')  # absolute 一定是从开头移动
# result = cursor.fetchone()
# print(result)

#
# update1 = 'update department set dep_name=%s where dep_name=%s'
# cursor.execute(update1,('rs','HR'))

delete1 = 'delete from department where dep_id=%s'
cursor.execute(delete1,(5,))

conn.commit()



cursor.close()
conn.close()
if __name__ == "__main__":
    pass