Python 连接数据库并遍历数据

import pymysql

建立连接

connection = pymysql.connect(

host='localhost',

user='your_username',

password='your_password',

database='your_database',

charset='utf8mb4'

)

try:

with connection.cursor() as cursor:

执行查询

sql = "SELECT * FROM your_table_name"

cursor.execute(sql)

获取所有结果

results = cursor.fetchall()

获取字段名

columns = [desc for desc in cursor.description]

print(" | ".join(columns))

print("-" * 40)

遍历并打印每一行

for row in results:

print(" | ".join(str(val) for val in row))

finally:

connection.close()