python 操作MySQL

mysql 表数据

Python安装pymysql:pip install PyMySQL

 

 1 import pymysql
 2 # 打开数据库连接
 3 connect = pymysql.Connect(
 4     host='localhost',
 5     port=3306,
 6     user='root',
 7     passwd='123456',
 8     db='test',
 9     charset='utf8'
10 )
11 
12 # 使用cursor()方法获取操作游标
13 cur = connect.cursor()
14 # 增加
15 sql = "INSERT INTO student VALUES ('%s','%s','%s','%s')" % (6, "李思思", 9, "女")
16 try:
17     cur.execute(sql)
18     connect.commit()
19 except:
20     connect.rollback()
21 
22 # 查询
23 sql = "SELECT * FROM student"
24 cur.execute(sql)
25 # 获取所有记录列表
26 result = cur.fetchall()
27 for row in result:
28     Sn0 = row[0]
29     Sname = row[1]
30     Sage = row[2]
31     Ssex = row[3]
32     print("Sno=%s,Sname=%s,Sage=%s,Ssex=%s" % (Sn0, Sname, Sage, Ssex))
33 
34 # 删除
35 sql = "DELETE FROM student WHERE Sno='%s'" % 6
36 try:
37     cur.execute(sql)
38 
39     # 提交到数据库执行
40     connect.commit()
41 except:
42     # 发生错误时回滚
43     connect.rollback()
44 
45 sql = "SELECT * FROM student"
46 cur.execute(sql)
47 result = cur.fetchall()
48 for row in result:
49     Sn0 = row[0]
50     Sname = row[1]
51     Sage = row[2]
52     Ssex = row[3]
53     print("Sno=%s,Sname=%s,Sage=%s,Ssex=%s" % (Sn0, Sname, Sage, Ssex))
54 
55 # 更新
56 sql = "UPDATE student SET Sage = '%s' WHERE Sno = '%s'" % (19,4)
57 try:
58     cur.execute(sql)
59 
60     # 提交到数据库执行
61     connect.commit()
62 except:
63     # 发生错误时回滚
64     connect.rollback()
65 
66 sql = "SELECT * FROM student"
67 cur.execute(sql)
68 result = cur.fetchall()
69 for row in result:
70     Sn0 = row[0]
71     Sname = row[1]
72     Sage = row[2]
73     Ssex = row[3]
74     print("Sno=%s,Sname=%s,Sage=%s,Ssex=%s" % (Sn0, Sname, Sage, Ssex))
75 # 关闭数据库连接
76 connect.close()