{"id":10902,"date":"2024-03-14T12:59:23","date_gmt":"2024-03-14T12:59:23","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-can-the-oracle-update-the-value-of-a-blob-field\/"},"modified":"2025-08-04T05:18:04","modified_gmt":"2025-08-04T05:18:04","slug":"how-can-the-oracle-update-the-value-of-a-blob-field","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-can-the-oracle-update-the-value-of-a-blob-field\/","title":{"rendered":"Oracle BLOB Field Update Guide"},"content":{"rendered":"<p>To update the value of a BLOB field, you can use the UPDATE statement to insert new BLOB data into the corresponding field. Here is an example SQL statement:<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">UPDATE<\/span> your_table\r\n<span class=\"hljs-keyword\">SET<\/span> your_blob_column <span class=\"hljs-operator\">=<\/span> empty_blob()\r\n<span class=\"hljs-keyword\">WHERE<\/span> your_condition;\r\n\r\n<span class=\"hljs-keyword\">SELECT<\/span> your_blob_column\r\n<span class=\"hljs-keyword\">INTO<\/span> your_blob_variable\r\n<span class=\"hljs-keyword\">FROM<\/span> your_table\r\n<span class=\"hljs-keyword\">WHERE<\/span> your_condition\r\n<span class=\"hljs-keyword\">FOR<\/span> <span class=\"hljs-keyword\">UPDATE<\/span>;\r\n\r\n<span class=\"hljs-keyword\">UPDATE<\/span> your_table\r\n<span class=\"hljs-keyword\">SET<\/span> your_blob_column <span class=\"hljs-operator\">=<\/span> your_blob_variable\r\n<span class=\"hljs-keyword\">WHERE<\/span> your_condition;\r\n<\/code><\/pre>\n<p>In this example, the first step is to set the BLOB field to an empty BLOB using an UPDATE statement. Then, the SELECT INTO statement is used to store the BLOB data that needs to be updated into a variable. Finally, another UPDATE statement is used to update the BLOB data from the variable back into the corresponding field. Make sure to lock the relevant rows using FOR UPDATE to prevent inconsistencies in the data due to concurrent updates when updating BLOB fields.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>To update the value of a BLOB field, you can use the UPDATE statement to insert new BLOB data into the corresponding field. Here is an example SQL statement: UPDATE your_table SET your_blob_column = empty_blob() WHERE your_condition; SELECT your_blob_column INTO your_blob_variable FROM your_table WHERE your_condition FOR UPDATE; UPDATE your_table SET your_blob_column = your_blob_variable WHERE your_condition; [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[13805,13803,813,9335,13804],"class_list":["post-10902","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-blob-operations","tag-oracle-blob","tag-oracle-database","tag-oracle-sql-tutorial","tag-sql-update-blob"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Oracle BLOB Field Update Guide - 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