python 读取 Oracle 的数据

@创建于：2022.04.29
@修改于：2022.04.29

• • 1、安装包
  • 2、读取代码段
  • 3、官网推荐
  • 4、参考资料

先安装cx_Oracle模块，然后进行读取。

pip install cx_Oracle
# 下面是建议的
conda install cx_Oracle

    def connct_oracle(self):
        '''
        从公司紫光云读取数据。
        :return:
        '''
        print("cx_Oracle.version:", cx_Oracle.version)
        host = "172.XX.X.X"
        port = "1521"
        sid = 'ORCLCDB'
        service_name = 'ORCLCDB.localdomain'
        use_sid = True
        if use_sid:
            dsn = cx_Oracle.makedsn(host, port, sid=sid)
        else:
            dsn = cx_Oracle.makedsn(host, port, service_name=service_name)
        print(dsn)
        connection = cx_Oracle.connect(user="username", password="password", dsn=dsn)
        cursor = connection.cursor()  # 返回连接的游标对象
        # cursor.execute("select userenv('language') nls_lang from dual") #显示数据库的字符集
        cursor.execute("select * from R_DATA_MP")  # 显示数据库的字符集
        result = cursor.fetchmany(10)
        print(result)
        cursor.close()
        connection.close()

import cx_Oracle

userpwd = ". . ." # Obtain password string from a user prompt or environment variable

connection = cx_Oracle.connect(user="hr", password=userpwd,
                               dsn="dbhost.example.com/orclpdb1",
                               encoding="UTF-8")

dsn = cx_Oracle.makedsn("dbhost.example.com", 1521, service_name="orclpdb1")
connection = cx_Oracle.connect(user="hr", password=userpwd, dsn=dsn,
                               encoding="UTF-8")

Connecting to Oracle Database

Connecting to Oracle Database

Python cx_Oracle.makedsn方法代码示例