97 lines
3.6 KiB
Markdown
97 lines
3.6 KiB
Markdown
# Open Source Python/Oracle Utility - cx_Oracle
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cx_Oracle is a Python extension module that enables access to Oracle Database
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and conforms to the Python database API 2.0 specifications with a considerable
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number of additions and a couple of exclusions. The time data type is not
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supported by Oracle and is therefore not implemented. The method
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cursor.nextset() is not implemented either as the DB API specification assumes
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an implementation of cursors that does not fit well with Oracle's
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implementation of cursors and implicit results. See the method
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cursor.getimplicitresults() for more information.
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See [PEP 249][1] for more information on the Python database API specification.
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See the [documentation][2] for a complete description of the module's
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capabilities.
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cx_Oracle is licensed under a BSD license which you can find [here][3].
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cx_Oracle has been tested with Python version 2.7, and with versions 3.4 and
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higher. You can use cx_Oracle with Oracle 11.2, 12.1 and 12.2 client libraries,
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allowing connection to multiple Oracle Database versions. Oracle's standard
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client-server version interoperability allows connection to both older and
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newer databases, for example Oracle 11.2 client libraries can connect to Oracle
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Database 10.2 or later.
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Please note that an Oracle client (or server) installation is required in order
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to use cx_Oracle. If you do not require the tools that come with a full client
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installation, it is recommended to install the [Instant Client][4].
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which is far easier to install.
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## Help
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Issues and questions can be raised with the cx_Oracle community on
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[GitHub][9] or on the [mailing list][5].
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## Installation
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Binaries for some platforms are available at [PyPI][6]. If you prefer to build
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your own you can use this command
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python -m pip install cx_Oracle
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which will download the source package, build and install it. Otherwise, you
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can download the source package directly from PyPI, extract it and run these
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commands instead
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python setup.py build
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python setup.py install
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This module has been built with Oracle client 11.2, 12.1 and 12.2 on Linux and
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Windows. Others have reported success with other platforms such as macOS.
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See [BUILD.txt][10] for additional information.
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## Usage Example
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```python
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from __future__ import print_function # needed for Python 2.x
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import cx_Oracle
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# connect via SQL*Net string or by each segment in a separate argument
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#connection = cx_Oracle.connect("user/password@TNS")
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connection = cx_Oracle.connect("user", "password", "TNS")
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cursor = connection.cursor()
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cursor.execute("""
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select Col1, Col2, Col3
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from SomeTable
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where Col4 = :arg_1
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and Col5 between :arg_2 and :arg_3""",
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arg_1 = "VALUE",
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arg_2 = 5,
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arg_3 = 15)
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for column_1, column_2, column_3 in cursor:
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print("Values:", column_1, column_2, column_3)
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```
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For more examples, please see the test suite in the test directory and the
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samples in the samples directory. You can also look at the scripts in the
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[cx_OracleTools][7] and the modules in the [cx_PyOracleLib][8] projects.
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[1]: https://www.python.org/dev/peps/pep-0249
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[2]: http://cx-oracle.readthedocs.io
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[3]: https://github.com/oracle/python-cx_Oracle/blob/master/LICENSE.txt
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[4]: http://www.oracle.com/technetwork/database/features/instant-client/index.html
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[5]: http://lists.sourceforge.net/lists/listinfo/cx-oracle-users
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[6]: https://pypi.python.org/pypi/cx_Oracle
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[7]: http://cx-oracletools.sourceforge.net
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[8]: http://cx-pyoraclelib.sourceforge.net
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[9]: https://github.com/oracle/python-cx_Oracle/issues
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[10]: https://github.com/oracle/python-cx_Oracle/blob/master/BUILD.txt
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