学步园

本文地址：http://blog.csdn.net/kongxx/article/details/7107661

1. 要想使Python可以操作Oracle数据库，首先需要安装cx_Oracle包，可以通过下面的地址来获取安装包

http://cx-oracle.sourceforge.net/2. 另外还需要oracle的一些类库，此时需要在运行python的机器上安装Oracle Instant Client软件包，可以通过下面地址获得
http://www.oracle.com/technetwork/database/features/instant-client/index-097480.html找到符合自己平台的包，然后安装，这里我使用的是rpm包，所以使用以下命令安装
$ sudo rpm -ivh oracle-instantclient11.2-basic-11.2.0.3.0-1.i386.rpm装完毕后还需要设置一下环境变量，如下$ export LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:/usr/lib/oracle/11.2/client/lib3. 创建一个简单的python文件，测试安装是否成功import cx_Oracle</p> <p>conn = cx_Oracle.connect('fkong/fkong@172.17.23.129/orcl')<br /> cursor = conn.cursor ()<br /> cursor.execute ("select * from dual")<br /> row = cursor.fetchone ()<br /> print row[0]</p> <p>cursor.close ()<br /> conn.close ()4. 下面看一个数据库建表和插入操作import cx_Oracle</p> <p>conn = cx_Oracle.connect('fkong/fkong@172.17.23.129/orcl')<br /> cursor = conn.cursor ()</p> <p>cursor.execute ("CREATE TABLE TEST(ID INT, COL1 VARCHAR(32), COL2 VARCHAR(32), COL3 VARCHAR(32))")</p> <p>cursor.execute ("INSERT INTO TEST (ID, COL1, COL2, COL3)VALUES(1, 'a', 'b', 'c')")<br /> cursor.execute ("INSERT INTO TEST (ID, COL1, COL2, COL3)VALUES(2, 'aa', 'bb', 'cc')")<br /> cursor.execute ("INSERT INTO TEST (ID, COL1, COL2, COL3)VALUES(3, 'aaa', 'bbb', 'ccc')")<br /> conn.commit()</p> <p>cursor.close ()<br /> conn.close ()5. 下面再来看看查询，查询通常有两种方式：一种是使用cursor.fetchall（）获取所有查询结果，然后再一行一行的迭代；另一种每次通过cursor.fetchone()获取一条记录，直到获取的结果为空为止。看一下下面的例子：import cx_Oracle</p> <p>conn = cx_Oracle.connect('fkong/fkong@172.17.23.129/orcl')<br /> cursor = conn.cursor ()</p> <p>cursor.execute ("SELECT * FROM TEST")<br /> rows = cursor.fetchall()<br /> for row in rows:<br /> print "%d, %s, %s, %s" % (row[0], row[1], row[2], row[3])</p> <p>print "Number of rows returned: %d" % cursor.rowcount</p> <p>cursor.execute ("SELECT * FROM TEST")<br /> while (1):<br /> row = cursor.fetchone()<br /> if row == None:<br /> break<br /> print "%d, %s, %s, %s" % (row[0], row[1], row[2], row[3])</p> <p>print "Number of rows returned: %d" % cursor.rowcount</p> <p>cursor.close ()<br /> conn.close ()