创建数据库连接池: # 导入pyodbc模块importpyodbc# 设置数据库连接参数server='your_server'database='your_database'username='your_username'password='your_password'# 创建连接池connection_pool=pyodbc.pooling.SimpleConnectionPool(5,10,driver='{SQL Server}',server=server,database=database,user=username,pass...
driver):connection_pool=pyodbc.pooling.ConnectionPool(minconn=1,maxconn=10,driver=driver,server=server,database=database,user=username,password=password)returnconnection_pool# 从连接池中获取连接defget_connection_from_pool(connection_pool):returnconnection_pool.getconn()# 将连接放回连接池defreturn_conne...
ConnSql().test() # <DBUtils.PooledDB.PooledDedicatedDBConnection object at 0x000001FE86B9A828> # <DBUtils.SteadyDB.SteadyDBCursor object at 0x000001FE86E16A20>
def read_sql_one(self, sql, params=None): conn = self.pool.connection() cursor = conn.cursor() cursor.execute(sql, params) data = cursor.fetchall() cursor.close() conn.close() return data conn_pool = None class SqlServerCon(object): def __init__(self): server = 'ta-proddb-ceus...
cur.execute("sql")rows=cur.fetchall()pool.put_connection(conn)returnrows 函数concurrent_access 可以在高频场景下调用,本质上,连接池相当于一个全局变量。 使用sqlalchemy创建连接池 使用sqlalchemy的create_engine函数,我们可以创建一个 SQLite 连接池。
21Why httpclient is recommended to go with a connection pool in server-to-server request? 2019-12-20 11:02 −Why httpclient is recommended to go with a connection pool in server-to-server request? Besides performance improvement with absence of connection and... ...
I would like to use data from SQL server in Pycharm using python. I have my database connection set up in Pycharm, but not sure how to access this data within my python code. I would like to query the data within the python code (similar to what I would do in R using the RODBC...
Fastapi 项目使用 sqlalchemy 连接的mysql 数据库,每次第二天首次访问数据库相关操作,都会报错:sqlalchemy.exc.OperationalError: (pymysql.err.OperationalError) (2003, “Can’t connect to MySQL server on ‘x.x.x.x’ ([Errno 111] Connection refused)”) 01 Python操作redis数据库 前言:这两天的事情不多...
关系型数据库的核心元素是什么? 数据行(记录具体的信息) 数据列(字段,类似于表格的表头) 数据表(数据行的集合) 数据库(数据表的集合) 简单描述一下 Python 访问 MySQL 的步骤? 创建connection 连接,连接数据库 获取cursor 游标对象,该对象用于执行 SQL 语句...
redis-py使用connection pool来管理对一个redis server的所有连接，避免每次建立、释放连接的开销 import ...