{"id":3034,"date":"2019-11-23T04:12:49","date_gmt":"2019-11-23T11:12:49","guid":{"rendered":"https:\/\/oracletutorial.com\/?page_id=3034"},"modified":"2025-05-31T19:11:43","modified_gmt":"2025-06-01T02:11:43","slug":"deleting-data-from-oracle-database-in-python","status":"publish","type":"page","link":"https:\/\/www.oracletutorial.com\/python-oracle\/deleting-data-from-oracle-database-in-python\/","title":{"rendered":"Deleting Data From Oracle Database in Python"},"content":{"rendered":"\n<p><strong>Summary<\/strong>: in this tutorial, you will learn how to use the Python cx_Oracle API to delete data from a table.<\/p>\n\n\n\n<p>To delete data from a table, you use the following steps:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>First, <a href=\"https:\/\/www.oracletutorial.com\/python-oracle\/connecting-to-oracle-database-in-python\/\">connect to the Oracle Database<\/a> by creating a new <code>Connection<\/code> object.<\/li>\n\n\n\n<li>Second, create a new <code>Cursor<\/code> object from the <code>Connection<\/code> object by calling the <code>Connection.Cursor()<\/code> method.<\/li>\n\n\n\n<li>Third, execute a <code><a href=\"https:\/\/www.oracletutorial.com\/oracle-basics\/oracle-delete\/\">DELETE<\/a><\/code> statement by calling the <code>Cursor.execute()<\/code> method.<\/li>\n\n\n\n<li>Fourth, call the <code>Connection.commit()<\/code> method to apply the changes to the database. If you forget to call the <code>Connection.commit()<\/code> method, you will see that the change will not take effect.<\/li>\n\n\n\n<li>Finally, release the <code>Cursor<\/code> and <code>Connection<\/code> objects by calling the <code>Cursor.close()<\/code> and <code>Connection.close()<\/code> method respectively. You can also use the <code>with<\/code> block to release these objects automatically.<\/li>\n<\/ul>\n\n\n\n<p>The following code illustrates how to delete a row from the <code>billing_headers<\/code> table based on a specific billing number.<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-1\" data-shcb-language-name=\"Python\" data-shcb-language-slug=\"python\"><span><code class=\"hljs language-python\"><span class=\"hljs-keyword\">import<\/span> oracledb\n<span class=\"hljs-keyword\">from<\/span> connect <span class=\"hljs-keyword\">import<\/span> connect\n<span class=\"hljs-keyword\">import<\/span> logging\n\n\n<span class=\"hljs-function\"><span class=\"hljs-keyword\">def<\/span> <span class=\"hljs-title\">delete<\/span><span class=\"hljs-params\">(billing_no: int)<\/span> -&gt; bool:<\/span>\n\n    sql = <span class=\"hljs-string\">'''DELETE FROM billing_headers WHERE billing_no = :billing_no'''<\/span>\n             \n    <span class=\"hljs-keyword\">try<\/span>:\n        <span class=\"hljs-keyword\">with<\/span> connect() <span class=\"hljs-keyword\">as<\/span> connection:\n            <span class=\"hljs-keyword\">with<\/span> connection.cursor() <span class=\"hljs-keyword\">as<\/span> cursor:\n                params = {\n                    <span class=\"hljs-string\">'billing_no'<\/span>: billing_no                    \n                }\n                cursor.execute(sql, params)\n                connection.commit()\n                <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-literal\">True<\/span>\n    <span class=\"hljs-keyword\">except<\/span> oracledb.Error <span class=\"hljs-keyword\">as<\/span> e:\n        error_message = <span class=\"hljs-string\">f\"Oracle database error during billing deletion for billing_no  <span class=\"hljs-subst\">{billing_no}<\/span>: <span class=\"hljs-subst\">{e}<\/span>\"<\/span>\n        logging.error(error_message)\n        <span class=\"hljs-keyword\">raise<\/span>\n    <span class=\"hljs-keyword\">except<\/span> Exception <span class=\"hljs-keyword\">as<\/span> e:\n        error_message = <span class=\"hljs-string\">f\"An unexpected error occurred during billing deletion for billing_no <span class=\"hljs-subst\">{billing_no}<\/span>: <span class=\"hljs-subst\">{e}<\/span>\"<\/span>\n        logging.critical(error_message) \n        <span class=\"hljs-keyword\">raise<\/span>\n\n\n<span class=\"hljs-keyword\">if<\/span> __name__ == <span class=\"hljs-string\">'__main__'<\/span>:\n    delete(<span class=\"hljs-number\">1<\/span>)<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-1\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Python<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">python<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>Here are the contents of the <code>billing_headers<\/code> table after executing the program:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-2\" data-shcb-language-name=\"Python\" data-shcb-language-slug=\"python\"><span><code class=\"hljs language-python\">SELECT * FROM billing_headers;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-2\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">Python<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">python<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"368\" height=\"79\" src=\"https:\/\/www.oracletutorial.com\/wp-content\/uploads\/2019\/11\/Python-Oracle-Delete-Example.png\" alt=\"Python Oracle Delete Example\" class=\"wp-image-3036\" srcset=\"https:\/\/www.oracletutorial.com\/wp-content\/uploads\/2019\/11\/Python-Oracle-Delete-Example.png 368w, https:\/\/www.oracletutorial.com\/wp-content\/uploads\/2019\/11\/Python-Oracle-Delete-Example-300x64.png 300w\" sizes=\"auto, (max-width: 368px) 100vw, 368px\" \/><\/figure>\n\n\n\n<p>As you can see clearly from the output, the row whose <code>billing_no<\/code> is 1 has been removed. It means that the program works as expected.<\/p>\n\n\n\n<p>In this tutorial, you have learned how to use the python-oracledb API to delete data in a table.<\/p>\n<div class=\"helpful-block-content\" data-title=\"\">\n\t<header>\n\t\t<div class=\"wth-question\">Was this tutorial helpful?<\/div>\n\t\t<div class=\"wth-thumbs\">\n\t\t\t<button\n\t\t\t\tdata-post=\"3034\"\n\t\t\t\tdata-post-url=\"https:\/\/www.oracletutorial.com\/python-oracle\/deleting-data-from-oracle-database-in-python\/\"\n\t\t\t\tdata-post-title=\"Deleting Data From Oracle Database in Python\"\n\t\t\t\tdata-response=\"1\"\n\t\t\t\tclass=\"wth-btn-rounded wth-yes-btn\"\n\t\t\t>\n\t\t\t\t<svg\n\t\t\t\t\txmlns=\"http:\/\/www.w3.org\/2000\/svg\"\n\t\t\t\t\tviewBox=\"0 0 24 24\"\n\t\t\t\t\tfill=\"none\"\n\t\t\t\t\tstroke=\"currentColor\"\n\t\t\t\t\tstroke-width=\"2\"\n\t\t\t\t\tstroke-linecap=\"round\"\n\t\t\t\t\tstroke-linejoin=\"round\"\n\t\t\t\t\tclass=\"feather feather-thumbs-up block w-full 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