python在数据库的基本操作(查询数据)

查询数据:

import pymysql

config = {
          'host':'localhost',
          'port':3306,
          'user':'root',
          'passwd':'root',
          'db':'logon',
          'charset':'utf8'
          }
# 打开数据库连接
conn = pymysql.connect(**config)

try:
    # 使用 cursor() 方法创建一个游标对象 cursor
    cursor = conn.cursor()

    # SQL 查询语句
    sql = "SELECT * FROM logon_people \
           WHERE age"

    # 执行SQL语句
    cursor.execute(sql)
    # 获取所有记录列表
    results = cursor.fetchall()
    print(results)
    for row in results:
        name = row[1]
        age = row[2]
        phone = row[5]
        # 打印结果
        print("name=%s,age=%s,phone=%s," %(name,age,phone))
    # 关闭游标
    cursor.close()

    # 关闭链接
    conn.close()
    print("查询成功")
except:
    print("查询失败")
    # 发生错误时回滚