db_config = { "dbname": "postgres", # 连接默认数据库以执行系统表查询 "user": "postgres", "password": "postgres", "host": "localhost", "port": 5432 } # 执行查询并打印结果 databases = list_all_databases(db_config) if databases: print("PostgreSQL数据库清单(非模板库):") for idx, d...
postgresql中文社区:http://www.postgres.cn/index.php/v2/home postgresql12中文手册:http://www.postgres.cn/docs/12/index.html 菜鸟教学:https://www.runoob.com/postgresql/postgresql-syntax.html 1、python3安装 windows离线安装python3.6.8环境:https://cloud.tencent.com/developer/article/1929280 Linux 离...
postgresql中文社区:http://www.postgres.cn/index.php/v2/home postgresql12中文手册:http://www.postgres.cn/docs/12/index.html 菜鸟教学:https://www.runoob.com/postgresql/postgresql-syntax.html 1、python3安装 windows离线安装python3.6.8环境:javascript:void(0) Linux 离线安装 python 3.6.10:javascript:...
下面的代码示例创建通向 Postgres 数据库的连接池。 然后,该代码使用cursor.execute函数以及 SQL CREATE TABLE 和 INSERT INTO 语句来创建表并插入数据。 提示 下面的示例代码使用连接池来创建和管理与 PostgreSQL 的连接。 强烈建议使用应用程序端连接池,因为: ...
fetch_all.py #!/usr/bin/python import psycopg2 con = psycopg2.connect(database='testdb', user='postgres', password='s$cret') with con: cur = con.cursor() cur.execute("SELECT * FROM cars") rows = cur.fetchall() for row in rows: ...
postgreSQL_pool = psycopg2.pool.SimpleConnectionPool(1,20, user="postgres", password="pass@#29", host="127.0.0.1", port="5432", database="postgres_db")if(postgreSQL_pool): print("Connection pool created successfully")# Use getconn() to Get Connection from connection poolps_connection = ...
>>> import pg8000.native >>> >>> con = pg8000.native.Connection("postgres", password="cpsnow") >>> >>> con.run("SELECT 'silo 1' WHERE 'a' = ANY(:v)", v=['a', 'b']) [['silo 1']] >>> con.close()However, using the array variant of ANY may cause a performance ...
However, using the array variant of ANY may cause a performance problem and so you can use the subquery variant of IN with the unnest function:>>> import pg8000.native >>> >>> con = pg8000.native.Connection("postgres", password="cpsnow") >>> >>> con.run( ... "SELECT 'silo 1...
注意:要在现实环境中更深入地比较 MySQL 和 PostgreSQL,请查看Why Uber Engineering Switched from Postgres to MySQL。 SQL Server 也是一种非常流行的 DBMS,以其可靠性、效率和安全性而闻名。它受到经常处理大量流量工作负载的公司的青睐,尤其是银行领域的公司。它是一个商业解决方案,也是与 Windows 服务最兼容的系...
import psycopg # Connection details (replace with your own) DATABASE_URL = "postgresql://postgres@localhost:5432/postgres" def create_item(name, description): with psycopg.connect(DATABASE_URL) as conn: with conn.cursor() as cur: cur.execute("INSERT INTO items (name, description) VALUES (...