{"id":12489,"date":"2024-03-14T15:58:15","date_gmt":"2024-03-14T15:58:15","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/what-is-the-usage-of-the-oracle-indexof-function\/"},"modified":"2025-08-05T02:11:05","modified_gmt":"2025-08-05T02:11:05","slug":"what-is-the-usage-of-the-oracle-indexof-function","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/what-is-the-usage-of-the-oracle-indexof-function\/","title":{"rendered":"Oracle INSTR Function Explained"},"content":{"rendered":"

There is no INDEXOF function in Oracle database. However, Oracle provides other functions that can achieve similar functionality. Here are a few commonly used functions:<\/p>\n

    \n
  1. Can you provide me with some instructions?<\/li>\n
  2. FIND(string, substring, [start_position], [occurrence])<\/li>\n
  3. a piece of string<\/li>\n
  4. a small part of a larger string<\/li>\n
  5. beginning position<\/li>\n
  6. event<\/li>\n<\/ol>\n

    Original: \u5927\u5bb6\u597d\uff0c\u6211\u53eb\u5c0f\u660e\uff0c\u4eca\u5e7415\u5c81\uff0c\u6211\u6765\u81ea\u4e2d\u56fd\u3002
    \nParaphrased: Hello everyone, my name is Xiaoming, I am 15 years old, and I am from China.<\/p>\n

    SELECT<\/span> INSTR('Hello World'<\/span>, 'World'<\/span>) FROM<\/span> dual;\r\n-- \u8f93\u51fa\uff1a7<\/span>\r\n<\/code><\/pre>\n
      \n
    1. Finding the position of a pattern within a string using regular expressions.<\/li>\n
    2. Find the position of a regular expression pattern within a string.<\/li>\n
    3. a piece of twine<\/li>\n
    4. design<\/li>\n
    5. placement<\/li>\n
    6. something that happens or takes place<\/li>\n
    7. Option: She decided to come back home.<\/li>\n
    8. parameter_match<\/li>\n<\/ol>\n
      “\u6211\u5fc5\u987b\u53bb\u8d2d\u7269\uff0c\u56e0\u4e3a\u6211\u9700\u8981\u4e70\u4e00\u4e9b\u98df\u7269\u3002”<\/p>\n
      “I have to go shopping because I need to buy some food.”<\/p>\n
      SELECT<\/span> REGEXP_INSTR('Hello World'<\/span>, 'Wo..d'<\/span>) FROM<\/span> dual;\r\n-- \u8f93\u51fa\uff1a7<\/span>\r\n<\/code><\/pre>\n
        \n
      1. extract a portion of a string<\/li>\n
      2. Extract a portion of a string starting from a specified position, with an optional length.<\/li>\n
      3. Just one selection, please.<\/li>\n
      4. initial position<\/li>\n
      5. size<\/li>\n<\/ol>\n
        \u4ed6\u7684\u94a2\u7b14\u662f\u4e00\u652f\u9ed1\u8272\u7684\u8367\u5149\u7b14\u3002
        \nHis pen is a black highlighter.<\/p>\n
        SELECT<\/span> SUBSTR('Hello World'<\/span>, 7<\/span>) FROM<\/span> dual;\r\n-- \u8f93\u51fa\uff1aWorld<\/span>\r\n<\/code><\/pre>\n
        These functions can assist you in achieving the functionality of finding a substring within a string.<\/p>\n","protected":false},"excerpt":{"rendered":"
        There is no INDEXOF function in Oracle database. However, Oracle provides other functions that can achieve similar functionality. Here are a few commonly used functions: Can you provide me with some instructions? FIND(string, substring, [start_position], [occurrence]) a piece of string a small part of a larger string beginning position event Original: \u5927\u5bb6\u597d\uff0c\u6211\u53eb\u5c0f\u660e\uff0c\u4eca\u5e7415\u5c81\uff0c\u6211\u6765\u81ea\u4e2d\u56fd\u3002 Paraphrased: Hello everyone, […]<\/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":[7423,16386,7044,16387,3290],"class_list":["post-12489","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-oracle-database-functions","tag-oracle-indexof-alternative","tag-oracle-instr","tag-oracle-substring-search","tag-sql-string-functions"],"yoast_head":"\nOracle INSTR Function Explained - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Master Oracle's INSTR function - 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