{"id":13471,"date":"2024-03-15T07:11:46","date_gmt":"2024-03-15T07:11:46","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-is-the-substring-function-used-in-oracle\/"},"modified":"2025-08-05T18:51:39","modified_gmt":"2025-08-05T18:51:39","slug":"how-is-the-substring-function-used-in-oracle","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-is-the-substring-function-used-in-oracle\/","title":{"rendered":"Oracle SUBSTR Function: usage Explained"},"content":{"rendered":"

The SUBSTR function in Oracle is used to extract a substring from a string. The basic syntax is as follows:<\/p>\n

Extracts a part of a string from a specified starting position with an optional length.<\/p>\n

    \n
  1. String: The string from which to extract a substring.<\/li>\n
  2. start_position: The starting position of the substring, counting from 1.<\/li>\n
  3. length: the length of the substring to extract.<\/li>\n<\/ol>\n

    If the length parameter is omitted, the SUBSTR function will extract from the start_position to the end of the string; if the length parameter is provided, the SUBSTR function will extract a substring of the specified length starting from the start_position.<\/p>\n

    Here are some examples:<\/p>\n

      \n
    1. Extract the substring starting from the third position:<\/li>\n<\/ol>\n
      SELECT<\/span> SUBSTR('Oracle'<\/span>, 3<\/span>) FROM<\/span> dual;\r\n-- \u7ed3\u679c\u4e3a 'acle'<\/span>\r\n<\/code><\/pre>\n
        \n
      1. Extract a substring of length 3 starting from the 5th position:<\/li>\n<\/ol>\n
        SELECT<\/span> SUBSTR('Oracle'<\/span>, 5<\/span>, 3<\/span>) FROM<\/span> dual;\r\n-- \u7ed3\u679c\u4e3a 'le'<\/span>\r\n<\/code><\/pre>\n
          \n
        1. Extract the substring starting from the second position to the third position from the end:<\/li>\n<\/ol>\n
          SELECT<\/span> SUBSTR('Oracle'<\/span>, 2<\/span>, -3<\/span>) FROM<\/span> dual;\r\n-- \u7ed3\u679c\u4e3a 'ra'<\/span>\r\n<\/code><\/pre>\n
          It is important to note that in Oracle, string indexes start counting from 1 and negative indexes can be used to count from the end of the string.<\/p>\n","protected":false},"excerpt":{"rendered":"
          The SUBSTR function in Oracle is used to extract a substring from a string. The basic syntax is as follows: Extracts a part of a string from a specified starting position with an optional length. String: The string from which to extract a substring. start_position: The starting position of the substring, counting from 1. length: […]<\/p>\n","protected":false},"author":8,"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":[472,7043,17966,1115,3289],"class_list":["post-13471","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-oracle-sql","tag-oracle-substr","tag-oracle-substring","tag-string-functions","tag-substr-function"],"yoast_head":"\nOracle SUBSTR Function: usage Explained - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Master Oracle's SUBSTR function with syntax, parameters, and practical examples for efficient string extraction.\" \/>\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-is-the-substring-function-used-in-oracle\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Oracle SUBSTR Function: usage Explained\" \/>\n<meta property=\"og:description\" content=\"Master Oracle's SUBSTR function with syntax, parameters, and practical examples for efficient string extraction.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/blog\/how-is-the-substring-function-used-in-oracle\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/SiliCloudGlobal\/\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-15T07:11:46+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-08-05T18:51:39+00:00\" \/>\n<meta name=\"author\" content=\"William Carter\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:site\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"William Carter\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-is-the-substring-function-used-in-oracle\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-is-the-substring-function-used-in-oracle\/\"},\"author\":{\"name\":\"William Carter\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/f697031891aacefc4b681d139781d3c0\"},\"headline\":\"Oracle SUBSTR Function: usage Explained\",\"datePublished\":\"2024-03-15T07:11:46+00:00\",\"dateModified\":\"2025-08-05T18:51:39+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-is-the-substring-function-used-in-oracle\/\"},\"wordCount\":174,\"publisher\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\"},\"keywords\":[\"Oracle SQL\",\"Oracle SUBSTR\",\"Oracle substring\",\"string functions\",\"SUBSTR function\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-is-the-substring-function-used-in-oracle\/\",\"url\":\"https:\/\/www.silicloud.com\/blog\/how-is-the-substring-function-used-in-oracle\/\",\"name\":\"Oracle SUBSTR Function: usage Explained - Blog - Silicon Cloud\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#website\"},\"datePublished\":\"2024-03-15T07:11:46+00:00\",\"dateModified\":\"2025-08-05T18:51:39+00:00\",\"description\":\"Master Oracle's SUBSTR function with syntax, parameters, and practical examples for efficient string extraction.\",\"breadcrumb\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-is-the-substring-function-used-in-oracle\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.silicloud.com\/blog\/how-is-the-substring-function-used-in-oracle\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-is-the-substring-function-used-in-oracle\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.silicloud.com\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Oracle SUBSTR Function: usage Explained\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#website\",\"url\":\"https:\/\/www.silicloud.com\/blog\/\",\"name\":\"Silicon Cloud Blog\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\"},\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\",\"name\":\"Silicon Cloud Blog\",\"url\":\"https:\/\/www.silicloud.com\/blog\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/www.silicloud.com\/blog\/wp-content\/uploads\/2023\/11\/EN-SILICON-Full.png\",\"contentUrl\":\"https:\/\/www.silicloud.com\/blog\/wp-content\/uploads\/2023\/11\/EN-SILICON-Full.png\",\"width\":1024,\"height\":1024,\"caption\":\"Silicon Cloud Blog\"},\"image\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/logo\/image\/\"},\"sameAs\":[\"https:\/\/www.facebook.com\/SiliCloudGlobal\/\",\"https:\/\/twitter.com\/SiliCloudGlobal\"]},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/f697031891aacefc4b681d139781d3c0\",\"name\":\"William Carter\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/1786698071dd8d74bec894b512f9e3c610c3a2a32985f67e688976cee3c8bbef?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/1786698071dd8d74bec894b512f9e3c610c3a2a32985f67e688976cee3c8bbef?s=96&d=mm&r=g\",\"caption\":\"William Carter\"},\"url\":\"https:\/\/www.silicloud.com\/blog\/author\/williamcarter\/\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Oracle SUBSTR Function: usage Explained - Blog - Silicon Cloud","description":"Master Oracle's SUBSTR function with syntax, parameters, and practical examples for efficient string extraction.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.silicloud.com\/blog\/how-is-the-substring-function-used-in-oracle\/","og_locale":"en_US","og_type":"article","og_title":"Oracle SUBSTR Function: usage Explained","og_description":"Master Oracle's SUBSTR function with syntax, parameters, and practical examples for efficient string extraction.","og_url":"https:\/\/www.silicloud.com\/blog\/how-is-the-substring-function-used-in-oracle\/","og_site_name":"Blog - Silicon Cloud","article_publisher":"https:\/\/www.facebook.com\/SiliCloudGlobal\/","article_published_time":"2024-03-15T07:11:46+00:00","article_modified_time":"2025-08-05T18:51:39+00:00","author":"William Carter","twitter_card":"summary_large_image","twitter_creator":"@SiliCloudGlobal","twitter_site":"@SiliCloudGlobal","twitter_misc":{"Written by":"William Carter","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.silicloud.com\/blog\/how-is-the-substring-function-used-in-oracle\/#article","isPartOf":{"@id":"https:\/\/www.silicloud.com\/blog\/how-is-the-substring-function-used-in-oracle\/"},"author":{"name":"William Carter","@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/f697031891aacefc4b681d139781d3c0"},"headline":"Oracle SUBSTR Function: usage Explained","datePublished":"2024-03-15T07:11:46+00:00","dateModified":"2025-08-05T18:51:39+00:00","mainEntityOfPage":{"@id":"https:\/\/www.silicloud.com\/blog\/how-is-the-substring-function-used-in-oracle\/"},"wordCount":174,"publisher":{"@id":"https:\/\/www.silicloud.com\/blog\/#organization"},"keywords":["Oracle SQL","Oracle SUBSTR","Oracle substring","string functions","SUBSTR function"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/www.silicloud.com\/blog\/how-is-the-substring-function-used-in-oracle\/","url":"https:\/\/www.silicloud.com\/blog\/how-is-the-substring-function-used-in-oracle\/","name":"Oracle SUBSTR Function: usage Explained - Blog - Silicon Cloud","isPartOf":{"@id":"https:\/\/www.silicloud.com\/blog\/#website"},"datePublished":"2024-03-15T07:11:46+00:00","dateModified":"2025-08-05T18:51:39+00:00","description":"Master Oracle's SUBSTR function with syntax, parameters, and practical examples for efficient string extraction.","breadcrumb":{"@id":"https:\/\/www.silicloud.com\/blog\/how-is-the-substring-function-used-in-oracle\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.silicloud.com\/blog\/how-is-the-substring-function-used-in-oracle\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.silicloud.com\/blog\/how-is-the-substring-function-used-in-oracle\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.silicloud.com\/blog\/"},{"@type":"ListItem","position":2,"name":"Oracle SUBSTR Function: usage Explained"}]},{"@type":"WebSite","@id":"https:\/\/www.silicloud.com\/blog\/#website","url":"https:\/\/www.silicloud.com\/blog\/","name":"Silicon Cloud Blog","description":"","publisher":{"@id":"https:\/\/www.silicloud.com\/blog\/#organization"},"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.silicloud.com\/blog\/#organization","name":"Silicon Cloud Blog","url":"https:\/\/www.silicloud.com\/blog\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/logo\/image\/","url":"https:\/\/www.silicloud.com\/blog\/wp-content\/uploads\/2023\/11\/EN-SILICON-Full.png","contentUrl":"https:\/\/www.silicloud.com\/blog\/wp-content\/uploads\/2023\/11\/EN-SILICON-Full.png","width":1024,"height":1024,"caption":"Silicon Cloud Blog"},"image":{"@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/SiliCloudGlobal\/","https:\/\/twitter.com\/SiliCloudGlobal"]},{"@type":"Person","@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/f697031891aacefc4b681d139781d3c0","name":"William Carter","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/1786698071dd8d74bec894b512f9e3c610c3a2a32985f67e688976cee3c8bbef?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/1786698071dd8d74bec894b512f9e3c610c3a2a32985f67e688976cee3c8bbef?s=96&d=mm&r=g","caption":"William Carter"},"url":"https:\/\/www.silicloud.com\/blog\/author\/williamcarter\/"}]}},"_links":{"self":[{"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts\/13471","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/comments?post=13471"}],"version-history":[{"count":2,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts\/13471\/revisions"}],"predecessor-version":[{"id":157457,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts\/13471\/revisions\/157457"}],"wp:attachment":[{"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/media?parent=13471"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/categories?post=13471"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/tags?post=13471"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}