python原生操作mysql

 1 import pymysql
 2 
 3 HOST = ‘127.0.0.1‘
 4 PORT = 3306
 5 USER = ‘root‘
 6 PASSWD = ‘123456‘
 7 DB = ‘test‘
 8 CHARSET = ‘utf8‘
 9 
10 conn = pymysql.connect(
11     host=HOST,
12     port=PORT,
13     user=USER,
14     passwd=PASSWD,
15     db=DB,
16     charset=CHARSET
17 )
18 
19 cursor = conn.cursor()
20 
21 create_dep = """CREATE TABLE department(
22 dep_id INT PRIMARY KEY,
23 dep_name VARCHAR(20) NOT NULL UNIQUE 
24 )"""
25 
26 create_emps = """CREATE TABLE employees(
27 emp_id INT PRIMARY KEY,
28 emp_name VARCHAR(20) NOT NULL UNIQUE,
29 birth_date DATE,
30 email VARCHAR(30),
31 dep_id INT,
32 FOREIGN KEY(dep_id) REFERENCES department(dep_id)
33 )"""
34 
35 create_slary = """CREATE TABLE slary(
36 auto_id INT PRIMARY KEY,
37 date DATE,
38 basic INT,
39 awards INT,
40 emp_id INT,
41 FOREIGN KEY(emp_id) REFERENCES employees(emp_id)
42 )"""
43 
44 # cursor.execute(create_dep)
45 # cursor.execute(create_emps)
46 # cursor.execute(create_slary)
47 
48 # insert = ‘insert into department VALUES (%s,%s)‘
49 # cursor.execute(insert,(1,‘HR‘))
50 # cursor.execute(insert,(2,‘DEVOPS‘))
51 # cursor.execute(insert,(3,‘DEV‘))
52 # cursor.executemany(insert,[(4,‘OPS‘),(5,‘MANAGER‘)])
53 
54 
55 
56 # select = ‘select * from department order by dep_id‘
57 # cursor.execute(select)
58 # result = cursor.fetchone()
59 # print(result)
60 # result = cursor.fetchmany(2)
61 # print(result)
62 # result = cursor.fetchall()
63 # print(result)
64 
65 # select = ‘select * from department order by dep_id‘
66 # cursor.execute(select)
67 # cursor.scroll(4)  # 默认以相对方式，从当前位置向下移动
68 # result = cursor.fetchone()
69 # print(result)
70 # cursor.scroll(0,mode=‘absolute‘)  # absolute 一定是从开头移动
71 # result = cursor.fetchone()
72 # print(result)
73 
74 #
75 # update1 = ‘update department set dep_name=%s where dep_name=%s‘
76 # cursor.execute(update1,(‘rs‘,‘HR‘))
77 
78 delete1 = ‘delete from department where dep_id=%s‘
79 cursor.execute(delete1,(5,))
80 
81 conn.commit()
82 
83 
84 
85 cursor.close()
86 conn.close()
87 if __name__ == "__main__":
88     pass