{"id":13863,"date":"2024-03-15T08:02:12","date_gmt":"2024-03-15T08:02:12","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-can-oracle-calculate-the-size-of-a-tables-data\/"},"modified":"2025-08-06T00:28:32","modified_gmt":"2025-08-06T00:28:32","slug":"how-can-oracle-calculate-the-size-of-a-tables-data","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-can-oracle-calculate-the-size-of-a-tables-data\/","title":{"rendered":"Calculate Oracle Table Size"},"content":{"rendered":"<p>To calculate the size of data in an Oracle table, you can use the following methods:<\/p>\n<p>Utilize the dba_segments view provided by Oracle to query the space occupied by a table. For example, executing the following SQL statement can show the space occupied by a specified table:<\/p>\n<pre class=\"post-pre\"><code class=\"lang-sql\">SELECT segment_name, segment_type, bytes\/1024\/1024 AS size_mb\r\nFROM dba_segments\r\nWHERE segment_name = 'YOUR_TABLE_NAME';\r\n<\/code><\/pre>\n<p>This will return the name, type, and size of the table in MB.<\/p>\n<p>2. Use the dba_extents view to query the table&#8217;s extension size, which includes all extensions of the table. For example, you can view the extension size of a specific table by executing the following SQL statement:<\/p>\n<pre class=\"post-pre\"><code class=\"lang-sql\">SELECT segment_name, segment_type, SUM(bytes)\/1024\/1024 AS size_mb\r\nFROM dba_extents\r\nWHERE segment_name = 'YOUR_TABLE_NAME'\r\nGROUP BY segment_name, segment_type;\r\n<\/code><\/pre>\n<p>This will return the table&#8217;s name, type, and the total storage size in MB.<\/p>\n<p>3. Use the dba_tables view to query the number of rows in a table. For example, running the following SQL statement can show the number of rows in a specific table:<\/p>\n<pre class=\"post-pre\"><code class=\"lang-sql\">SELECT num_rows\r\nFROM dba_tables\r\nWHERE table_name = 'YOUR_TABLE_NAME';\r\n<\/code><\/pre>\n<p>This will return the number of rows in the table.<\/p>\n<p>Please note that the YOUR_TABLE_NAME in the above methods should be replaced with the name of the table you want to analyze.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>To calculate the size of data in an Oracle table, you can use the following methods: Utilize the dba_segments view provided by Oracle to query the space occupied by a table. For example, executing the following SQL statement can show the space occupied by a specified table: SELECT segment_name, segment_type, bytes\/1024\/1024 AS size_mb FROM dba_segments [&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":[18638,18637,282,1845,3116],"class_list":["post-13863","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-dba_extents","tag-dba_segments","tag-oracle","tag-sql-queries","tag-table-size"],"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>Calculate Oracle Table Size - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Learn how to measure Oracle table space using dba_segments &amp; dba_extents. Simple SQL queries for accurate data size calculation.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/blog\/how-can-oracle-calculate-the-size-of-a-tables-data\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Calculate Oracle Table Size\" \/>\n<meta property=\"og:description\" content=\"Learn how to measure Oracle table space using dba_segments &amp; dba_extents. 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