Python 2.7.9 Demo - 019.01.CRUD oracle by cx_Oracle

最新推荐文章于 2025-09-05 14:01:23 发布

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最新推荐文章于 2025-09-05 14:01:23 发布

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文章标签： python 数据库

本文提供了使用Python和cx_Oracle库进行Oracle数据库的基本操作示例，包括查询、插入、更新和删除记录的方法。

select

#coding=utf-8
#!/usr/bin/python
import cx_Oracle;

conn = None;
cursor = None;
try:
    conn = cx_Oracle.connect('username/password@xxx.xxx.xxx.xxx/sid');
    cursor = conn.cursor();
    cursor.execute('select t.empno, t.ename from scott.emp t');
    # 取回的是列表，列表中包含元组
    list = cursor.fetchall();
    print list;

    for record in list:
        print "Record %d is %s!" % (record[0], record[1]);
    
except Exception as e:
    print ('Error : {}'.format(e));
finally:
    cursor.close;
    print 'cursor closed.';
    conn.close;
    print 'connection closed.';

insert

#coding=utf-8
#!/usr/bin/python
import cx_Oracle;
import time;

conn = None;
cursor = None;
try:
    conn = cx_Oracle.connect('username/password@xxx.xxx.xxx.xxx/sid');
    cursor = conn.cursor();
    tuple = ('1001', 'Nick Huang');
    cursor.execute("insert into scott.emp (empno, ename) values (:1, :2)", tuple);
    conn.commit();
    print 'Insert successfully.';

except Exception as e:
    print ('Error : {}'.format(e));
finally:
    cursor.close;
    print 'cursor closed';
    conn.close;
    print 'connection closed';

update

#coding=utf-8
#!/usr/bin/python
import cx_Oracle;
import time;

conn = None;
cursor = None;
try:
    conn = cx_Oracle.connect('username/password@xxx.xxx.xxx.xxx/sid');
    cursor = conn.cursor();
    tuple = ('Robin Chen', '1001');
    cursor.execute("update scott.emp t set t.ename = :1 where t.empno = :2", tuple);
    conn.commit();
    print 'Update successfully.';

except Exception as e:
    print ('Error : {}'.format(e));
finally:
    cursor.close;
    print 'cursor closed';
    conn.close;
    print 'connection closed';

delete

#coding=utf-8
#!/usr/bin/python
import cx_Oracle;
import time;

conn = None;
cursor = None;
try:
    conn = cx_Oracle.connect('username/password@xxx.xxx.xxx.xxx/sid');
    cursor = conn.cursor();
    param_map = {'id' : '1001'};
    cursor.execute("delete from scott.emp t where t.empno = :id", param_map);
    conn.commit();
    print 'Delete successfully.';

except Exception as e:
    print ('Error : {}'.format(e));
finally:
    cursor.close;
    print 'cursor closed';
    conn.close;
    print 'connection closed';