用Python代码连接MySQL并发送命令
1.添加数据
python
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()
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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python# 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
python
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()