{"id":11135,"date":"2024-03-14T13:29:50","date_gmt":"2024-03-14T13:29:50","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/what-is-the-function-of-the-instr-function-in-oracle\/"},"modified":"2025-08-04T08:00:58","modified_gmt":"2025-08-04T08:00:58","slug":"what-is-the-function-of-the-instr-function-in-oracle","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/what-is-the-function-of-the-instr-function-in-oracle\/","title":{"rendered":"Oracle INSTR Function Explained"},"content":{"rendered":"

In Oracle, the INSTR function is used to find the first occurrence of a string within another string. Its syntax is as follows:<\/p>\n

INSTR(string1, string2, [start_position], [occurrence])\r\n<\/code><\/pre>\n
Among them:<\/p>\n
    \n
  1. string1 is the string to be searched;<\/li>\n
  2. string2 is the substring to be searched for;<\/li>\n
  3. The start_position is an optional parameter that indicates the starting position for the search, with a default value of 1.<\/li>\n
  4. “occurrence is an optional parameter that indicates the number of times the substring to be searched for appears in the string, with a default value of 1.”<\/li>\n<\/ol>\n
    The INSTR function will return the position of string2 in string1, or 0 if it cannot be found.<\/p>\n","protected":false},"excerpt":{"rendered":"
    In Oracle, the INSTR function is used to find the first occurrence of a string within another string. Its syntax is as follows: INSTR(string1, string2, [start_position], [occurrence]) Among them: string1 is the string to be searched; string2 is the substring to be searched for; The start_position is an optional parameter that indicates the starting position […]<\/p>\n","protected":false},"author":9,"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":[14218,813,12258,3301,14219],"class_list":["post-11135","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-instr-syntax","tag-oracle-database","tag-oracle-instr-function","tag-oracle-string-functions","tag-sql-substring-search"],"yoast_head":"\nOracle INSTR Function Explained - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Learn Oracle's INSTR function syntax and usage to find substrings in strings with practical examples.\" \/>\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\/what-is-the-function-of-the-instr-function-in-oracle\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Oracle INSTR Function Explained\" \/>\n<meta property=\"og:description\" content=\"Learn Oracle's INSTR function syntax and usage to find substrings in strings with practical examples.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/blog\/what-is-the-function-of-the-instr-function-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=\"2024-03-14T13:29:50+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-08-04T08:00:58+00:00\" \/>\n<meta name=\"author\" content=\"Ava Mitchell\" \/>\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=\"Ava Mitchell\" \/>\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\/what-is-the-function-of-the-instr-function-in-oracle\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/what-is-the-function-of-the-instr-function-in-oracle\/\"},\"author\":{\"name\":\"Ava Mitchell\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/a3e2658c2cb9fb2be95ae0a8861f4a64\"},\"headline\":\"Oracle INSTR Function Explained\",\"datePublished\":\"2024-03-14T13:29:50+00:00\",\"dateModified\":\"2025-08-04T08:00:58+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/what-is-the-function-of-the-instr-function-in-oracle\/\"},\"wordCount\":107,\"publisher\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\"},\"keywords\":[\"INSTR syntax\",\"Oracle database\",\"Oracle INSTR function\",\"Oracle string functions\",\"SQL substring search\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/what-is-the-function-of-the-instr-function-in-oracle\/\",\"url\":\"https:\/\/www.silicloud.com\/blog\/what-is-the-function-of-the-instr-function-in-oracle\/\",\"name\":\"Oracle INSTR Function Explained - Blog - Silicon Cloud\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#website\"},\"datePublished\":\"2024-03-14T13:29:50+00:00\",\"dateModified\":\"2025-08-04T08:00:58+00:00\",\"description\":\"Learn Oracle's INSTR function syntax and usage to find substrings in strings with practical examples.\",\"breadcrumb\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/what-is-the-function-of-the-instr-function-in-oracle\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.silicloud.com\/blog\/what-is-the-function-of-the-instr-function-in-oracle\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/what-is-the-function-of-the-instr-function-in-oracle\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.silicloud.com\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Oracle INSTR Function 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\/a3e2658c2cb9fb2be95ae0a8861f4a64\",\"name\":\"Ava Mitchell\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/15c63cd0564b4a2e07d611bcdffa296f6ea80e8db07c3091f43a84010514899d?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/15c63cd0564b4a2e07d611bcdffa296f6ea80e8db07c3091f43a84010514899d?s=96&d=mm&r=g\",\"caption\":\"Ava Mitchell\"},\"url\":\"https:\/\/www.silicloud.com\/blog\/author\/avamitchell\/\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Oracle INSTR Function Explained - Blog - Silicon Cloud","description":"Learn Oracle's INSTR function syntax and usage to find substrings in strings with practical examples.","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\/what-is-the-function-of-the-instr-function-in-oracle\/","og_locale":"en_US","og_type":"article","og_title":"Oracle INSTR Function Explained","og_description":"Learn Oracle's INSTR function syntax and usage to find substrings in strings with practical examples.","og_url":"https:\/\/www.silicloud.com\/blog\/what-is-the-function-of-the-instr-function-in-oracle\/","og_site_name":"Blog - Silicon Cloud","article_publisher":"https:\/\/www.facebook.com\/SiliCloudGlobal\/","article_published_time":"2024-03-14T13:29:50+00:00","article_modified_time":"2025-08-04T08:00:58+00:00","author":"Ava Mitchell","twitter_card":"summary_large_image","twitter_creator":"@SiliCloudGlobal","twitter_site":"@SiliCloudGlobal","twitter_misc":{"Written by":"Ava Mitchell","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.silicloud.com\/blog\/what-is-the-function-of-the-instr-function-in-oracle\/#article","isPartOf":{"@id":"https:\/\/www.silicloud.com\/blog\/what-is-the-function-of-the-instr-function-in-oracle\/"},"author":{"name":"Ava Mitchell","@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/a3e2658c2cb9fb2be95ae0a8861f4a64"},"headline":"Oracle INSTR Function Explained","datePublished":"2024-03-14T13:29:50+00:00","dateModified":"2025-08-04T08:00:58+00:00","mainEntityOfPage":{"@id":"https:\/\/www.silicloud.com\/blog\/what-is-the-function-of-the-instr-function-in-oracle\/"},"wordCount":107,"publisher":{"@id":"https:\/\/www.silicloud.com\/blog\/#organization"},"keywords":["INSTR syntax","Oracle database","Oracle INSTR function","Oracle string functions","SQL substring search"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/www.silicloud.com\/blog\/what-is-the-function-of-the-instr-function-in-oracle\/","url":"https:\/\/www.silicloud.com\/blog\/what-is-the-function-of-the-instr-function-in-oracle\/","name":"Oracle INSTR Function Explained - Blog - Silicon Cloud","isPartOf":{"@id":"https:\/\/www.silicloud.com\/blog\/#website"},"datePublished":"2024-03-14T13:29:50+00:00","dateModified":"2025-08-04T08:00:58+00:00","description":"Learn Oracle's INSTR function syntax and usage to find substrings in strings with practical examples.","breadcrumb":{"@id":"https:\/\/www.silicloud.com\/blog\/what-is-the-function-of-the-instr-function-in-oracle\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.silicloud.com\/blog\/what-is-the-function-of-the-instr-function-in-oracle\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.silicloud.com\/blog\/what-is-the-function-of-the-instr-function-in-oracle\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.silicloud.com\/blog\/"},{"@type":"ListItem","position":2,"name":"Oracle INSTR Function 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\/a3e2658c2cb9fb2be95ae0a8861f4a64","name":"Ava Mitchell","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/15c63cd0564b4a2e07d611bcdffa296f6ea80e8db07c3091f43a84010514899d?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/15c63cd0564b4a2e07d611bcdffa296f6ea80e8db07c3091f43a84010514899d?s=96&d=mm&r=g","caption":"Ava Mitchell"},"url":"https:\/\/www.silicloud.com\/blog\/author\/avamitchell\/"}]}},"_links":{"self":[{"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts\/11135","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\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/comments?post=11135"}],"version-history":[{"count":2,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts\/11135\/revisions"}],"predecessor-version":[{"id":154904,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts\/11135\/revisions\/154904"}],"wp:attachment":[{"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/media?parent=11135"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/categories?post=11135"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/tags?post=11135"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}