{"id":543,"date":"2023-02-25T15:52:31","date_gmt":"2022-08-29T07:51:44","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/index.php\/2023\/11\/30\/sql%e3%81%aeinstr%e9%96%a2%e6%95%b0%e3%81%ae%e5%ae%9f%e8%a3%85%e6%96%b9%e6%b3%95%e3%81%af%e3%81%a9%e3%81%86%e3%81%99%e3%82%8c%e3%81%b0%e3%82%88%e3%81%84%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f\/"},"modified":"2025-08-01T00:27:19","modified_gmt":"2025-07-31T15:27:19","slug":"sql%e3%81%aeinstr%e9%96%a2%e6%95%b0%e3%81%ae%e5%ae%9f%e8%a3%85%e6%96%b9%e6%b3%95%e3%81%af%e3%81%a9%e3%81%86%e3%81%99%e3%82%8c%e3%81%b0%e3%82%88%e3%81%84%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/sql%e3%81%aeinstr%e9%96%a2%e6%95%b0%e3%81%ae%e5%ae%9f%e8%a3%85%e6%96%b9%e6%b3%95%e3%81%af%e3%81%a9%e3%81%86%e3%81%99%e3%82%8c%e3%81%b0%e3%82%88%e3%81%84%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f\/","title":{"rendered":"SQL\u306eINSTR()\u95a2\u6570\u306e\u5b9f\u88c5\u65b9\u6cd5\u306f\u3069\u3046\u3059\u308c\u3070\u3088\u3044\u3067\u3059\u304b\uff1f"},"content":{"rendered":"<p>\u307f\u306a\u3055\u3093\u3001\u3053\u3093\u306b\u3061\u306f\uff01\u4eca\u56de\u306e\u8a18\u4e8b\u3067\u306f\u3001SQL\u306eINSTR()\u95a2\u6570\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<hr \/>\n<h2>SQL\u306eINSTR()\u306e\u52d5\u4f5c<\/h2>\n<p>SQL\u306f\u3001\u30af\u30a8\u30ea\u8a00\u8a9e\u3067\u3042\u308a\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u6587\u5b57\u5217\u30c7\u30fc\u30bf\u5024\u3092\u6271\u3046\u305f\u3081\u306e\u3055\u307e\u3056\u307e\u306a\u7d44\u307f\u8fbc\u307f\u95a2\u6570\u3092\u542b\u3093\u3067\u3044\u307e\u3059\u3002<\/p>\n<p>\u305d\u306e\u3088\u3046\u306a\u8208\u5473\u6df1\u3044\u6a5f\u80fd\u306e1\u3064\u306f\u3001SQL\u306eINSTR()\u95a2\u6570\u3067\u3059\u3002<\/p>\n<p>SQL\u306eINSTR()\u95a2\u6570\u306f\u3001\u4ed6\u306e\u6587\u5b57\u5217\u306e\u4e2d\u3067\u6700\u521d\u306b\u6307\u5b9a\u3057\u305f\u6587\u5b57\u5217\u307e\u305f\u306f\u6587\u5b57\u306e\u51fa\u73fe\u3092\u691c\u51fa\u3057\u307e\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u3001INSTR()\u95a2\u6570\u306f\u3001\u4ed6\u306e\u6587\u5b57\u5217\u30c7\u30fc\u30bf\u5024\u306e\u4e2d\u3067\u4efb\u610f\u306e\u6587\u5b57\u5217\u307e\u305f\u306f\u90e8\u5206\u6587\u5b57\u5217\u306e\u521d\u3081\/\u6700\u521d\u306e\u51fa\u73fe\u4f4d\u7f6e\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n<p>SQL INSTR()\u95a2\u6570\u306e\u52d5\u4f5c\u3092\u7406\u89e3\u3057\u305f\u3089\u3001\u540c\u3058\u69cb\u9020\u3068\u6587\u6cd5\u3092\u4f7f\u3063\u3066\u9032\u3081\u307e\u3057\u3087\u3046\u3002<\/p>\n<hr \/>\n<h2>INSTR\uff08\uff09\u306e\u69cb\u6587\u3092\u7406\u89e3\u3059\u308b<\/h2>\n<p>SQL\u306eINSTR\uff08\uff09\u95a2\u6570\u306f\u30012\u3064\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u53d7\u3051\u5165\u308c\u307e\u3059\u3002<\/p>\n<ul class=\"post-ul\">\n<li>String\/character to search for in the other String data value.<\/li>\n<li>The string within which the occurrence of the character\/string would be searched for.<\/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\uff08\u30a4\u30f3\u30b9\u30c8\u30e9\u30af\u30b7\u30e7\u30f3\uff09\u95a2\u6570\u306f\u3001\u691c\u7d22\u5bfe\u8c61\u306e\u6587\u5b57\u5217\u306e\u6700\u521d\u306e\u51fa\u73fe\u4f4d\u7f6e\u3092\u793a\u3059\u6574\u6570\u5024\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n<p>\u6b21\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3055\u307e\u3056\u307e\u306a\u4f8b\u3092\u901a\u3058\u3066INSTR()\u95a2\u6570\u306e\u5b9f\u88c5\u3092\u7406\u89e3\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<hr \/>\n<h2>\u4f8b\u3092\u901a\u3058\u3066SQL\u306eINSTR()\u3092\u5b9f\u88c5\u3059\u308b<\/h2>\n<p>\u4ee5\u4e0b\u306e\u4f8b\u3067\u306f\u3001SQL\u306eINSTR()\u95a2\u6570\u306f\u5165\u529b\u6587\u5b57\u5217\u30c7\u30fc\u30bf\u5185\u3067\u6587\u5b57 &#8216;P&#8217; \u306e\u6700\u521d\u306e\u51fa\u73fe\u3092\u691c\u7d22\u3057\u307e\u3059\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>\u65e5\u672c\u8a9e\u3067\u7701\u7565\u30d5\u30a9\u30fc\u30e0\u3067\u4ee5\u4e0b\u3092\u8868\u73fe\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u4e00\u3064\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u3067\u5341\u5206\u3067\u3059\u3002<\/p>\n<p>\u51fa\u529b\uff1a<\/p>\n<pre class=\"post-pre\"><code><span class=\"token number\">3<\/span>\r\n<\/code><\/pre>\n<p>\u6587\u5b57\u5217\u5185\u3067\u306e\u6700\u521d\u306e\u6587\u5b57\u306e\u51fa\u73fe\u3092\u691c\u7d22\u3059\u308b\u4ee5\u5916\u306b\u3082\u3001INSTR() \u95a2\u6570\u306f\u6587\u5b57\u5217\u306e\u5024\u3068\u3082\u9023\u643a\u3057\u307e\u3059\u3002<\/p>\n<p>\u3053\u3053\u3067\u306f\u3001\u5165\u529b\u30c7\u30fc\u30bf\u306e\u4e2d\u3067\u6700\u521d\u306b\u6587\u5b57\u5217\u300cJournalDev\u300d\u304c\u73fe\u308c\u308b\u5834\u6240\u3092\u691c\u7d22\u3057\u3001\u305d\u306e\u4f4d\u7f6e\u306e\u5024\u3092\u8fd4\u3057\u307e\u3059\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>\u51fa\u529b\uff1a<\/p>\n<pre class=\"post-pre\"><code><span class=\"token number\">8<\/span>\r\n<\/code><\/pre>\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001\u7570\u306a\u308b\u5217\u3092\u6301\u3064\u30c6\u30fc\u30d6\u30eb\u3092\u4f5c\u6210\u3057\u307e\u3057\u305f\u3002\u30c6\u30fc\u30d6\u30eb\u300cInfo\u300d\u306e\u5217\u300ccity\u300d\u306b\u5b58\u5728\u3059\u308b\u5404\u30c7\u30fc\u30bf\u5024\u306e\u6700\u521d\u306e\u6587\u5b57\u300ca\u300d\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u8868\u793a\u3057\u3088\u3046\u3068\u3057\u307e\u3057\u305f\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> <span class=\"token number\">1<\/span>st_Occurrence_of_a\r\n<span class=\"token keyword\">FROM<\/span> Info<span class=\"token punctuation\">;<\/span>\r\n<\/code><\/pre>\n<p>\u3053\u306e\u672c\u306f\u975e\u5e38\u306b\u8208\u5473\u6df1\u3044\u3067\u3059\u3002 (Kono hon wa hij\u014d ni ky\u014dmi-bukai desu.)<\/p>\n<pre class=\"post-pre\"><code>city\t<span class=\"token number\">1<\/span>st_Occurrence_of_a\r\nPuna\t<span class=\"token number\">4<\/span>\r\nSatara\t<span class=\"token number\">2<\/span>\r\nPuna\t<span class=\"token number\">4<\/span>\r\nMumbai\t<span class=\"token number\">5<\/span>\r\nUSA\t<span class=\"token number\">3<\/span>\r\n<\/code><\/pre>\n<p>\u3082\u3057\u6587\u5b57\u5217\/\u6587\u5b57\u306e\u6700\u521d\u306e\u51fa\u73fe\u3092\u691c\u7d22\u3059\u308b\u5bfe\u8c61\u304c\u3001\u6587\u5b57\u5217\u306b\u542b\u307e\u308c\u3066\u3044\u306a\u3044\u5834\u5408\u3001INSTR\u95a2\u6570\u306f\u30bc\u30ed\uff080\uff09\u3092\u8fd4\u3057\u307e\u3059\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>\u51fa\u529b:<\/p>\n<pre class=\"post-pre\"><code><span class=\"token number\">0<\/span>\r\n<\/code><\/pre>\n<hr \/>\n<h2>\u7d50\u8ad6<\/h2>\n<p>\u4ee5\u4e0a\u3067\u3001\u3053\u306e\u30c8\u30d4\u30c3\u30af\u306f\u7d42\u308f\u308a\u3067\u3059\u3002\u3082\u3057\u7591\u554f\u304c\u3042\u308b\u5834\u5408\u3001\u30b3\u30e1\u30f3\u30c8\u6b04\u306b\u81ea\u7531\u306b\u3054\u610f\u898b\u3092\u304a\u5bc4\u305b\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>\u540c\u69d8\u306eSQL\u306b\u95a2\u9023\u3059\u308b\u8a18\u4e8b\u3092\u3082\u3063\u3068\u8aad\u307f\u305f\u3044\u5834\u5408\u306f\u3001SQL JournalDev\u3092\u3054\u89a7\u304f\u3060\u3055\u3044\u3002<\/p>\n<hr \/>\n<h2>\u53c2\u8003\u6587\u732e<\/h2>\n<ul class=\"post-ul\">\n<li>SQL INSTR() function \u2013 Documentation<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u307f\u306a\u3055\u3093\u3001\u3053\u3093\u306b\u3061\u306f\uff01\u4eca\u56de\u306e\u8a18\u4e8b\u3067\u306f\u3001SQL\u306eINSTR()\u95a2\u6570\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002 SQL\u306eINSTR()\u306e\u52d5\u4f5c SQL\u306f\u3001\u30af\u30a8\u30ea\u8a00\u8a9e\u3067\u3042\u308a\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u6587\u5b57\u5217\u30c7\u30fc\u30bf\u5024\u3092\u6271\u3046\u305f\u3081\u306e\u3055\u307e\u3056\u307e\u306a\u7d44\u307f\u8fbc\u307f\u95a2\u6570\u3092\u542b\u3093\u3067 [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[14,26],"class_list":["post-543","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-14","tag-26"],"yoast_head":"<!-- This site is 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