conn= pymysql.connect(host="127.0.0.1", user="root", password="root", databse="test", port=3306)#指定ip,端口,用户,密码,库等信息cursor= conn.cursor()#指定一个游标,库中指定了部分cursor类型n = cursor.execute("select * from table_name")#在execute方法中写入SQL语句,进行查询,返回服务端对应...
print("Successfully connected to MySQL database") except mysql.connector.Error as err: print(f"Error: {err}") finally: if conn.is_connected(): conn.close() connect_to_mysql() 1.2 PostgreSQL PostgreSQL是一个功能强大的开源对象关系型数据库系统。Python连接PostgreSQL数据库常用的驱动程序是psycopg2。...
使用pymysql连接某一个数据库,通过cursor方法获取一个游标,这样就可以直接使用这个游标执行sql语句,进行数据库的交互操作了。由于调用了数据库,注意异常捕获和最后的资源释放 基本使用 一般流程 建立连接 获取游标 执行SQL 提交事务(失败回滚) 释放资源 import pymysql conn = None try: conn = pymysql.connect(host...
5、Python操作数据库:my_sql.py frompymysqlimportconnect, cursorsfrompymysql.errimportOperationalErrorfromread_db_configimport*fromlogimport*fromread_excelimport*logging.info("读取数据库配置文件") config=ReadConfig() host=config.get_db("host") logging.info("读取host_ip :{}".format(host)) port=c...
Execute parameterized query 获取查询结果 Fetch query results 关闭连接 Close connection SQL语句与变量的结合使用 饼状图 我们还可以创建一个饼状图来展示不同类型查询的分布情况。以下是使用Mermaid语法编写的饼状图: 43%21%21%14%查询类型分布SELECTINSERTUPDATEDELETE ...
在插入数据库的过程遇到以下错误： _mysql_exceptions.ProgrammingError: (1064, "You have an e 最后...
This open-source command-line tool and Python library simplifies database exploration for MySQL, PostgreSQL, and MariaDB users, eliminating the need to write tedious or bespoke SQL queries. With commands like peepdb view <connection_name>, you can instantly inspect tables, explore specific datasets...
These modules let you connect to, query, and manage SQL databases with Python code. Each module specializes in specific database systems while maintaining consistent interaction patterns. Module NamePrimary DatabaseKey Features MySQLdb MySQL Native C implementation, high performance psycopg2 PostgreSQL Full...
其中parameterized 只需要一个装饰器@parameterized.expand,ddt 需要三个装饰器@ddt、@data、@unpack,它们生成的 test 分别有一个名字,ddt 会携带具体的参数信息。 5.1 parameterized 代码语言:javascript 代码运行次数:0 运行 AI代码解释 import unittest from parameterized import parameterized, param from src.demo.ca...
Define a SQL Delete Query Next, prepare a SQL delete query to delete a row from a table. Delete query contains the row to be deleted based on a condition placed in where clause of a query. For example,DELETE FROM MySQL_table WHERE id=10; ...