以下是一个简单的示例,展示了如何使用`psycopg2`连接到PostgreSQL数据库: ```python import psycopg2 # 连接到PostgreSQL数据库 conn = psycopg2.connect( host="localhost", database="your_database", user="your_username", password="your_password" ) # 创建一个游标对象 cur = conn.cursor() # 执行SQL查...
importpsycopg2try:connection=psycopg2.connect(user="your_username",password="your_password",host="127.0.0.1",port="5432",database="your_database")cursor=connection.cursor()print("Connected to PostgreSQL database!")except(Exception,psycopg2.Error)aserror:print("Error while connecting to PostgreSQL",...
connect(database="db_test", user="postgres", password="12345678", host="127.0.0.1", port="5432") ## 执行之后不报错,就表示连接成功了! print('postgreSQL数据库“db_test”连接成功!') postgreSQL数据库“db_test”连接成功! 2用Python操纵SQL数据库 在完成连接之后,通过cursor游标的方法,结合SQL语句...
轉換後,PostgreSQL 相容的內嵌 SQL 查詢如下所示。 dtype = “type1” stm = ‘“SELECT searchcode FROM TypesTable WHERE code=”’ + “’” + str(dtype) + “’ LIMIT 1”# For PostgreSQL Database Connectio...
() # connect to the PostgreSQL database conn = psycopg2.connect(**params) # create a new cursor cur = conn.cursor() # execute the INSERT statement cur.execute(sql, (vendor_name,)) # get the generated id back vendor_id = cur.fetchone()[0] # commit the changes to the database ...
First, connect to the PostgreSQL server using the psql client tool: psql -U postgres Second, create a new database called suppliers: CREATE DATABASE suppliers; Third, exit the psql: exit Connecting to the PostgreSQL database from Python First, create a configuration file called database.ini in...
conn= psycopg2.connect("dbname='%s' user='%s' host='%s' password='%s'"%(db_name, db_user, db_host, db_pass))print"connected to postgres db successfully"except:print"I am unable to connect to the database"returnconntry: connection=make_conn() ...
First, establish a connection to the PostgreSQL server by calling the connect() function of the psycopg2 module. conn = psycopg2.connect(config) If the connection is created successfully, the connect() function returns a new Connection object; Otherwise, it throws a DatabaseError exception. Next...
开发工具 PyCharm 和 Visual Studio Code 使用 psycopg2 包连接 openGauss。 一、python 环境 版本使用 python3.6 1.1 linux 下的 python 环境 centos7.6 环境下使用 yum 安装 python3 1.1.1 系统如果可以上网。使用华为的源进行配置 wget -O /etc/yum.repos.d/CentOS-Base.repo https://repo.huaweicloud.com...