{"id":96008,"date":"2024-10-20T05:50:16","date_gmt":"2024-10-19T21:50:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/96008\/"},"modified":"2024-10-20T05:50:17","modified_gmt":"2024-10-19T21:50:17","slug":"oracle%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e7%94%a8instr%e4%bb%a3%e6%9b%bflike%e5%af%a6%e6%93%8d","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/96008\/","title":{"rendered":"Oracle\u6578\u64da\u5eab\u4e2d\u7528INSTR\u4ee3\u66ffLIKE\u5be6\u64cd"},"content":{"rendered":"<h1 id=\"oracle%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e7%94%a8instr%e4%bb%a3%e6%9b%bflike%e5%af%a6%e6%93%8d-ImnlBtirPt\">Oracle\u6578\u64da\u5eab\u4e2d\u7528INSTR\u4ee3\u66ffLIKE\u5be6\u64cd<\/h1>\n<p>\u5728Oracle\u6578\u64da\u5eab\u4e2d\uff0c\u67e5\u8a62\u5b57\u7b26\u4e32\u7684\u5339\u914d\u662f\u5e38\u898b\u7684\u9700\u6c42\u3002\u50b3\u7d71\u4e0a\uff0c\u958b\u767c\u8005\u7d93\u5e38\u4f7f\u7528LIKE\u904b\u7b97\u7b26\u4f86\u9032\u884c\u6a21\u7cca\u67e5\u8a62\u3002\u7136\u800c\uff0c\u4f7f\u7528INSTR\u51fd\u6578\u4f86\u66ff\u4ee3LIKE\u904b\u7b97\u7b26\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\u53ef\u80fd\u6703\u66f4\u6709\u6548\u7387\u3002\u672c\u6587\u5c07\u63a2\u8a0eINSTR\u51fd\u6578\u7684\u4f7f\u7528\u65b9\u6cd5\u53ca\u5176\u512a\u52e2\uff0c\u4e26\u63d0\u4f9b\u5be6\u969b\u7684\u4ee3\u78bc\u793a\u4f8b\u3002<\/p>\n<h2 id=\"instr%e5%87%bd%e6%95%b8%e6%a6%82%e8%bf%b0-ImnlBtirPt\">INSTR\u51fd\u6578\u6982\u8ff0<\/h2>\n<p>INSTR\u51fd\u6578\u7528\u65bc\u67e5\u627e\u4e00\u500b\u5b57\u7b26\u4e32\u5728\u53e6\u4e00\u500b\u5b57\u7b26\u4e32\u4e2d\u51fa\u73fe\u7684\u4f4d\u7f6e\u3002\u5176\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>INSTR(string1, string2, [start_position], [match_occurance])<\/code><\/pre>\n<ul>\n<li><strong>string1<\/strong>\uff1a\u8981\u641c\u7d22\u7684\u5b57\u7b26\u4e32\u3002<\/li>\n<li><strong>string2<\/strong>\uff1a\u8981\u67e5\u627e\u7684\u5b50\u5b57\u7b26\u4e32\u3002<\/li>\n<li><strong>start_position<\/strong>\uff1a\u53ef\u9078\uff0c\u6307\u5b9a\u5f9e\u54ea\u500b\u4f4d\u7f6e\u958b\u59cb\u641c\u7d22\uff0c\u9ed8\u8a8d\u70ba1\u3002<\/li>\n<li><strong>match_occurance<\/strong>\uff1a\u53ef\u9078\uff0c\u6307\u5b9a\u8981\u67e5\u627e\u7684\u5b50\u5b57\u7b26\u4e32\u51fa\u73fe\u7684\u6b21\u6578\uff0c\u9ed8\u8a8d\u70ba1\u3002<\/li>\n<\/ul>\n<p>\u5982\u679cINSTR\u51fd\u6578\u627e\u5230\u5339\u914d\u7684\u5b50\u5b57\u7b26\u4e32\uff0c\u5247\u8fd4\u56de\u5176\u4f4d\u7f6e\uff1b\u5982\u679c\u672a\u627e\u5230\uff0c\u5247\u8fd4\u56de0\u3002<\/p>\n<h2 id=\"like%e9%81%8b%e7%ae%97%e7%ac%a6%e6%a6%82%e8%bf%b0-ImnlBtirPt\">LIKE\u904b\u7b97\u7b26\u6982\u8ff0<\/h2>\n<p>LIKE\u904b\u7b97\u7b26\u7528\u65bc\u5728SQL\u67e5\u8a62\u4e2d\u9032\u884c\u6a21\u5f0f\u5339\u914d\u3002\u5176\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>SELECT * FROM table_name WHERE column_name LIKE 'pattern';<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c&#8217;pattern&#8217;\u53ef\u4ee5\u5305\u542b\u901a\u914d\u7b26\uff0c\u4f8b\u5982&#8217;%&#8217;\uff08\u8868\u793a\u4efb\u610f\u6578\u91cf\u7684\u5b57\u7b26\uff09\u548c&#8217;_&#8217;\uff08\u8868\u793a\u55ae\u500b\u5b57\u7b26\uff09\u3002<\/p>\n<h2 id=\"instr%e8%88%87like%e7%9a%84%e6%af%94%e8%bc%83-ImnlBtirPt\">INSTR\u8207LIKE\u7684\u6bd4\u8f03<\/h2>\n<p>\u96d6\u7136LIKE\u904b\u7b97\u7b26\u5728\u9032\u884c\u6a21\u7cca\u67e5\u8a62\u6642\u975e\u5e38\u65b9\u4fbf\uff0c\u4f46\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u4f7f\u7528INSTR\u51fd\u6578\u53ef\u80fd\u6703\u66f4\u5177\u512a\u52e2\uff1a<\/p>\n<ul>\n<li><strong>\u6027\u80fd\uff1a<\/strong>\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\uff0cINSTR\u51fd\u6578\u901a\u5e38\u6bd4LIKE\u904b\u7b97\u7b26\u66f4\u5feb\uff0c\u56e0\u70ba\u5b83\u4e0d\u9700\u8981\u89e3\u6790\u901a\u914d\u7b26\u3002<\/li>\n<li><strong>\u9748\u6d3b\u6027\uff1a<\/strong>INSTR\u51fd\u6578\u53ef\u4ee5\u7cbe\u78ba\u63a7\u5236\u67e5\u627e\u7684\u8d77\u59cb\u4f4d\u7f6e\u548c\u5339\u914d\u6b21\u6578\uff0c\u9019\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\u662f\u975e\u5e38\u6709\u7528\u7684\u3002<\/li>\n<li><strong>\u53ef\u8b80\u6027\uff1a<\/strong>\u5c0d\u65bc\u67d0\u4e9b\u958b\u767c\u8005\u4f86\u8aaa\uff0c\u4f7f\u7528INSTR\u51fd\u6578\u53ef\u80fd\u6703\u4f7f\u67e5\u8a62\u66f4\u6613\u65bc\u7406\u89e3\uff0c\u7279\u5225\u662f\u5728\u9700\u8981\u591a\u6b21\u67e5\u627e\u7684\u60c5\u6cc1\u4e0b\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%af%a6%e9%9a%9b%e7%a4%ba%e4%be%8b-ImnlBtirPt\">\u5be6\u969b\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4f7f\u7528INSTR\u51fd\u6578\u66ff\u4ee3LIKE\u904b\u7b97\u7b26\u7684\u5be6\u969b\u793a\u4f8b\uff1a<\/p>\n<pre><code>-- \u4f7f\u7528LIKE\u904b\u7b97\u7b26\nSELECT * FROM employees WHERE name LIKE '%John%';\n\n-- \u4f7f\u7528INSTR\u51fd\u6578\nSELECT * FROM employees WHERE INSTR(name, 'John') &gt; 0;\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u5169\u500b\u67e5\u8a62\u90fd\u6703\u8fd4\u56de\u5305\u542b\u201cJohn\u201d\u7684\u6240\u6709\u54e1\u5de5\u8a18\u9304\u3002\u7136\u800c\uff0c\u4f7f\u7528INSTR\u51fd\u6578\u7684\u67e5\u8a62\u5728\u6027\u80fd\u4e0a\u53ef\u80fd\u6703\u66f4\u512a\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-ImnlBtirPt\">\u7d50\u8ad6<\/h2>\n<p>\u5728Oracle\u6578\u64da\u5eab\u4e2d\uff0c\u4f7f\u7528INSTR\u51fd\u6578\u4f86\u66ff\u4ee3LIKE\u904b\u7b97\u7b26\u53ef\u4ee5\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u548c\u9748\u6d3b\u6027\u3002\u96d6\u7136LIKE\u904b\u7b97\u7b26\u5728\u9032\u884c\u7c21\u55ae\u7684\u6a21\u5f0f\u5339\u914d\u6642\u975e\u5e38\u65b9\u4fbf\uff0c\u4f46\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6216\u9700\u8981\u7cbe\u78ba\u63a7\u5236\u67e5\u627e\u689d\u4ef6\u6642\uff0cINSTR\u51fd\u6578\u7121\u7591\u662f\u4e00\u500b\u66f4\u597d\u7684\u9078\u64c7\u3002<\/p>\n<p>\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u4f01\u696d\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u5eab\u67e5\u8a62\u65b9\u6cd5\u81f3\u95dc\u91cd\u8981\u3002\u7121\u8ad6\u662f\u4f7f\u7528INSTR\u9084\u662fLIKE\uff0c\u4e86\u89e3\u5b83\u5011\u7684\u7279\u6027\u548c\u9069\u7528\u5834\u666f\u5c07\u6709\u52a9\u65bc\u958b\u767c\u8005\u7de8\u5beb\u66f4\u9ad8\u6548\u7684SQL\u67e5\u8a62\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc<code><a href=\"https:\/\/server.hk\">VPS<\/a><\/code>\u548c<code><a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a><\/code>\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22Oracle\u6578\u64da\u5eab\u4e2d\u5982\u4f55\u4f7f\u7528INSTR\u51fd\u6578\u66ff\u4ee3LIKE\u9032\u884c\u5b57\u7b26\u4e32\u5339\u914d\uff0c\u63d0\u5347\u67e5\u8a62\u6548\u7387\u8207\u6027\u80fd\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-96008","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96008","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=96008"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96008\/revisions"}],"predecessor-version":[{"id":96009,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96008\/revisions\/96009"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=96008"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=96008"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=96008"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}