Python操作MySQL
用Python代码连接MySQL并发送命令
1.添加数据
import pymysql# 1.连接 MySQL
conn = pymysql.connect(host="127.0.0.1", port=3306, user="root", passwd="123123", charset="utf8", db="unicom")
cursor = conn.cursor(cursor=pymysql.cursors.DictCursor)# 2.发送指令
cursor.execute("insert into admin(username, password, mobile) values('abc', '123123', '12341235821')") # 里边写数据库指令
conn.commit()# 3.关闭
cursor.close()
conn.close()
- 注意
在发送指令时，不能用format去做SQL的拼接，会导致SQL注入，有安全隐患，应使用内置的excute方法# 1.用列表传 sql = "insert into admin(username, password, mobile) values(%s, %s, %s)" # 里边写数据库指令 cursor.execute(sql, ["xyz", "qwe123", "122222222"]) conn.commit()# 2.用字典传 sql = "insert into admin(username, password, mobile) values(%(n1)s, %(n2)s, %(n3)s)" # 里边写数据库指令 cursor.execute(sql, {"n1": "abc", "n2": "qwe123", "n3": "123123123"}) conn.commit()
2.获取数据
import pymysql# 1.连接MySQL
conn = pymysql.connect(host="127.0.0.1", port=3306, user="root", passwd="401025", charset="utf8", db="unicom")
cursor = conn.cursor(cursor=pymysql.cursors.DictCursor)# 2.发送指令
cursor.execute("select * from admin") # 里边写数据库指令
data_list = cursor.fetchall()
for row_list in data_list:print(row_list)# 3.关闭
cursor.close()
conn.close()