{"id":319,"date":"2023-09-18T15:14:55","date_gmt":"2023-01-10T14:24:05","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/index.php\/2023\/11\/30\/%e5%a6%82%e4%bd%95%e5%ae%9e%e7%8e%b0sql%e7%9a%84instr%e5%87%bd%e6%95%b0%ef%bc%9f\/"},"modified":"2025-08-01T21:55:50","modified_gmt":"2025-08-01T13:55:50","slug":"%e5%a6%82%e4%bd%95%e5%ae%9e%e7%8e%b0sql%e7%9a%84instr%e5%87%bd%e6%95%b0%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%a6%82%e4%bd%95%e5%ae%9e%e7%8e%b0sql%e7%9a%84instr%e5%87%bd%e6%95%b0%ef%bc%9f\/","title":{"rendered":"SQL INSTR()\u51fd\u6570\u5b8c\u5168\u6307\u5357\uff1a\u5b57\u7b26\u4e32\u67e5\u8be2\u4e0e\u5b9a\u4f4d\u6280\u5de7"},"content":{"rendered":"<p>\u5927\u5bb6\u597d\uff01\u5728\u8fd9\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u4eec\u5c06\u8be6\u7ec6\u4e86\u89e3SQL INSTR()\u51fd\u6570\u3002<\/p>\n<hr \/>\n<h2>SQL INSTR()\u7684\u5de5\u4f5c\u539f\u7406\u662f\u4ec0\u4e48\uff1f<\/h2>\n<p>SQL\u662f\u4e00\u79cd\u67e5\u8be2\u8bed\u8a00\uff0c\u5185\u7f6e\u4e86\u5404\u79cd\u7528\u4e8e\u5904\u7406\u6570\u636e\u5e93\u7684\u5b57\u7b26\u4e32\u6570\u636e\u503c\u7684\u51fd\u6570\u3002<\/p>\n<p>\u5176\u4e2d\u4e00\u4e2a\u6709\u8da3\u7684\u51fd\u6570\u662fSQL INSTR()\u51fd\u6570\u3002<\/p>\n<p>SQL\u7684INSTR()\u51fd\u6570\u7528\u4e8e\u68c0\u6d4b\u4e00\u4e2a\u5b57\u7b26\u4e32\u6216\u5b57\u7b26\u5728\u53e6\u4e00\u4e2a\u5b57\u7b26\u4e32\u4e2d\u7684\u7b2c\u4e00\u6b21\u51fa\u73b0\u3002\u56e0\u6b64\uff0cINSTR()\u51fd\u6570\u53ef\u4ee5\u786e\u5b9a\u53e6\u4e00\u4e2a\u5b57\u7b26\u4e32\u6570\u636e\u503c\u4e2d\u4efb\u610f\u5b57\u7b26\u4e32\u6216\u5b50\u5b57\u7b26\u4e32\u7684\u521d\u59cb\u51fa\u73b0\u4f4d\u7f6e\u3002<\/p>\n<p>\u5728\u7406\u89e3\u4e86SQL INSTR()\u51fd\u6570\u7684\u5de5\u4f5c\u539f\u7406\u540e\uff0c\u8ba9\u6211\u4eec\u7ee7\u7eed\u63a2\u8ba8\u5b83\u7684\u7ed3\u6784\u548c\u8bed\u6cd5\u3002<\/p>\n<hr \/>\n<h2>\u7406\u89e3INSTR()\u51fd\u6570\u7684\u8bed\u6cd5<\/h2>\n<p>SQL \u4e2d\u7684 INSTR() \u51fd\u6570\u63a5\u53d7\u4e24\u4e2a\u53c2\u6570\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>\u8981\u5728\u53e6\u4e00\u4e2a\u5b57\u7b26\u4e32\u6570\u636e\u503c\u4e2d\u641c\u7d22\u7684\u5b57\u7b26\u4e32\/\u5b57\u7b26\u3002<\/li>\n<li>\u5c06\u5728\u5176\u4e2d\u641c\u7d22\u5b57\u7b26\/\u5b57\u7b26\u4e32\u51fa\u73b0\u4f4d\u7f6e\u7684\u5b57\u7b26\u4e32\u3002<\/li>\n<\/ul>\n<pre class=\"post-pre\"><code>INSTR<span class=\"token punctuation\">(<\/span>string1<span class=\"token punctuation\">,<\/span> string2<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<\/code><\/pre>\n<p>INSTR() \u51fd\u6570\u8fd4\u56de\u4e00\u4e2a\u6574\u6570\u503c\uff0c\u8868\u793a\u8981\u641c\u7d22\u7684\u5b57\u7b26\u4e32\u7684\u7b2c\u4e00\u6b21\u51fa\u73b0\u7684\u7d22\u5f15\u4f4d\u7f6e\u3002<\/p>\n<p>\u73b0\u5728\u8ba9\u6211\u4eec\u901a\u8fc7\u591a\u4e2a\u4f8b\u5b50\u6765\u7406\u89e3\u63a5\u4e0b\u6765\u4e00\u8282\u4e2dINSTR()\u51fd\u6570\u7684\u5b9e\u9645\u5e94\u7528\u3002<\/p>\n<hr \/>\n<h2>\u901a\u8fc7\u793a\u4f8b\u5b9e\u73b0SQL\u7684INSTR()\u51fd\u6570<\/h2>\n<p>\u5728\u4e0b\u9762\u7684\u793a\u4f8b\u4e2d\uff0cSQL INSTR() \u51fd\u6570\u4f1a\u5728\u8f93\u5165\u7684\u5b57\u7b26\u4e32\u6570\u636e\u503c\u4e2d\u641c\u7d22\u5b57\u7b26&#8217;P&#8217;\u7684\u7b2c\u4e00\u4e2a\u51fa\u73b0\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"token keyword\">SELECT<\/span> INSTR<span class=\"token punctuation\">(<\/span><span class=\"token string\">'JYPython'<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">'P'<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<\/code><\/pre>\n<p>\u8f93\u51fa\uff1a<\/p>\n<pre class=\"post-pre\"><code><span class=\"token number\">3<\/span>\r\n<\/code><\/pre>\n<p>\u9664\u4e86\u5728\u5b57\u7b26\u4e32\u4e2d\u641c\u7d22\u5b57\u7b26\u7684\u7b2c\u4e00\u6b21\u51fa\u73b0\u4e4b\u5916\uff0cINSTR()\u51fd\u6570\u8fd8\u53ef\u4ee5\u4e0e\u5b57\u7b26\u4e32\u503c\u4e00\u8d77\u4f7f\u7528\u3002<\/p>\n<p>\u5728\u8fd9\u91cc\uff0c\u6211\u4eec\u5728\u8f93\u5165\u6570\u636e\u503c\u4e2d\u641c\u7d22\u4e86\u5b57\u7b26\u4e32&#8217;JournalDev&#8217;\u7684\u7b2c\u4e00\u6b21\u51fa\u73b0\uff0c\u5e76\u8fd4\u56de\u4e86\u5b83\u7684\u4f4d\u7f6e\u503c\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"token keyword\">SELECT<\/span> INSTR<span class=\"token punctuation\">(<\/span><span class=\"token string\">'Python@JournalDev'<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">'JournalDev'<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<\/code><\/pre>\n<p>\u8f93\u51fa\uff1a<\/p>\n<pre class=\"post-pre\"><code><span class=\"token number\">8<\/span>\r\n<\/code><\/pre>\n<p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u521b\u5efa\u4e86\u4e00\u4e2a\u5177\u6709\u4e0d\u540c\u5217\u7684\u8868\u683c\u3002\u6211\u4eec\u5c1d\u8bd5\u5c55\u793a\u5728\u8868\u683c&#8221;Info&#8221;\u7684&#8221;city&#8221;\u5217\u4e2d\u6bcf\u4e2a\u6570\u636e\u503c\u4e2d\u5b57\u7b26&#8217;a&#8217;\u7684\u9996\u6b21\u51fa\u73b0\u7684\u7d22\u5f15\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"token keyword\">create<\/span> <span class=\"token keyword\">table<\/span> Info<span class=\"token punctuation\">(<\/span>id <span class=\"token keyword\">integer<\/span><span class=\"token punctuation\">,<\/span> Cost <span class=\"token keyword\">integer<\/span><span class=\"token punctuation\">,<\/span> city <span class=\"token keyword\">varchar<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">200<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token keyword\">insert<\/span> <span class=\"token keyword\">into<\/span> Info<span class=\"token punctuation\">(<\/span>id<span class=\"token punctuation\">,<\/span> Cost<span class=\"token punctuation\">,<\/span>city<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">values<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">100<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">\"Puna\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token keyword\">insert<\/span> <span class=\"token keyword\">into<\/span> Info<span class=\"token punctuation\">(<\/span>id<span class=\"token punctuation\">,<\/span> Cost<span class=\"token punctuation\">,<\/span>city<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">values<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">50<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"Satara\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token keyword\">insert<\/span> <span class=\"token keyword\">into<\/span> Info<span class=\"token punctuation\">(<\/span>id<span class=\"token punctuation\">,<\/span> Cost<span class=\"token punctuation\">,<\/span>city<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">values<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">65<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">\"Puna\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token keyword\">insert<\/span> <span class=\"token keyword\">into<\/span> Info<span class=\"token punctuation\">(<\/span>id<span class=\"token punctuation\">,<\/span> Cost<span class=\"token punctuation\">,<\/span>city<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">values<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">4<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">97<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">\"Mumbai\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token keyword\">insert<\/span> <span class=\"token keyword\">into<\/span> Info<span class=\"token punctuation\">(<\/span>id<span class=\"token punctuation\">,<\/span> Cost<span class=\"token punctuation\">,<\/span>city<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">values<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">12<\/span><span class=\"token punctuation\">,<\/span><span class=\"token string\">\"USA\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token keyword\">SELECT<\/span> city<span class=\"token punctuation\">,<\/span> INSTR<span class=\"token punctuation\">(<\/span>city<span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"a\"<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">as<\/span> a\u5b57\u7b26\u9996\u6b21\u51fa\u73b0\u4f4d\u7f6e\r\n<span class=\"token keyword\">FROM<\/span> Info<span class=\"token punctuation\">;<\/span>\r\n<\/code><\/pre>\n<p>\u8f93\u51fa\uff1a<\/p>\n<pre class=\"post-pre\"><code>city\ta\u5b57\u7b26\u9996\u6b21\u51fa\u73b0\u4f4d\u7f6e\r\nPuna\t4\r\nSatara\t2\r\nPuna\t4\r\nMumbai\t5\r\nUSA\t3\r\n<\/code><\/pre>\n<p>\u5982\u679c\u8981\u641c\u7d22\u7684\u5b57\u7b26\u4e32\/\u5b57\u7b26\u5728\u5b57\u7b26\u4e32\u4e2d\u7b2c\u4e00\u6b21\u51fa\u73b0\u4e0d\u5b58\u5728\u6216\u4e0d\u5728\u5b57\u7b26\u4e32\u4e2d\uff0c\u5219INSTR()\u51fd\u6570\u8fd4\u56de\u96f6\uff080\uff09\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"token keyword\">SELECT<\/span> INSTR<span class=\"token punctuation\">(<\/span><span class=\"token string\">'Python'<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">'xx'<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<\/code><\/pre>\n<p>\u8f93\u51fa\uff1a<\/p>\n<pre class=\"post-pre\"><code><span class=\"token number\">0<\/span>\r\n<\/code><\/pre>\n<hr \/>\n<h2>\u7ed3\u8bba<\/h2>\n<p>\u901a\u8fc7\u672c\u6587\u7684\u4ecb\u7ecd\uff0c\u6211\u4eec\u5df2\u7ecf\u4e86\u89e3\u4e86SQL INSTR()\u51fd\u6570\u7684\u4f7f\u7528\u65b9\u6cd5\u3002\u5982\u679c\u4f60\u9047\u5230\u4efb\u4f55\u7591\u95ee\uff0c\u8bf7\u968f\u610f\u5728\u4e0b\u65b9\u8fdb\u884c\u8bc4\u8bba\u3002<\/p>\n<p>\u5982\u679c\u60f3\u9605\u8bfb\u66f4\u591a\u4e0eSQL\u76f8\u5173\u7684\u6587\u7ae0\uff0c\u8bf7\u8bbf\u95eeSQL JournalDev\u3002<\/p>\n<hr \/>\n<h2>\u53c2\u8003\u6587\u732e<\/h2>\n<ul class=\"post-ul\">\n<li>SQL INSTR()\u51fd\u6570 \u2013 \u5b98\u65b9\u6587\u6863<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u5927\u5bb6\u597d\uff01\u5728\u8fd9\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u4eec\u5c06\u8be6\u7ec6\u4e86\u89e3SQL INSTR()\u51fd\u6570\u3002 SQL INSTR()\u7684\u5de5\u4f5c\u539f\u7406\u662f\u4ec0\u4e48\uff1f S [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[1098,320,1099],"class_list":["post-319","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-instr","tag-sql","tag-1099"],"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>SQL INSTR()\u51fd\u6570\u5b8c\u5168\u6307\u5357\uff1a\u5b57\u7b26\u4e32\u67e5\u8be2\u4e0e\u5b9a\u4f4d\u6280\u5de7 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" 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