Connection to PostgreSQL, Oracle&MySQL from Python
Overview
There are some samples to connect PostgreSQL, Oracle, MySQL from Python.
How to connect PostgreSQL
Package installation
01 | pip install psycopg2 |
Example
01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 | import psycopg2HOST = 'your_host'PORT = '5432'DB_NAME = 'your_db_name'USER = 'your_user_name'PASSWORD = 'your_password'conn = psycopg2.connect("host=" + HOST + " port=" + PORT + " dbname=" + DB_NAME + " user=" + USER + " password=" + PASSWORD)cur = conn.cursor()cur.execute("select version()")rows = cur.fetchall()cur.close()conn.close()print(rows) |
Connect to MySQL
Package installation
01 | pip install mysqlclient |
Example
01 02 03 04 05 06 07 08 09 10 11 12 13 14 | import MySQLdbHOST = 'your_host'PORT = 3306 #Not str but intDB_NAME = 'your_db_name'USER = 'your_user_name'PASSWORD = 'your_password'conn = MySQLdb.connect( user=USER, passwd=PASSWORD, host=HOST, db=DB_NAME,port=PORT)cur = conn.cursor()cur.execute("select version()")rows = cur.fetchall()conn.close()print(rows) |
Oracleの場合
Package installation ※Oracle client is also necessary adding to this.
01 | pip install cx_Oracle |
Example
01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 | import cx_OracleHOST = 'your_host'PORT = '1521'DB_NAME = 'your_db_name'USER = 'your_user_name'PASSWORD = 'your_password'SERVICE_NAME = 'your_service_name'tns = cx_Oracle.makedsn(HOST, PORT, service_name =SERVICE_NAME)conn = cx_Oracle.connect(USER,PASSWORD,tns)cur = conn.cursor()cur.execute("select * from v$version")rows = cur.fetchall()cur.close()conn.close()print(rows) |
