{"id":101211,"date":"2024-03-22T03:38:35","date_gmt":"2024-03-21T18:38:35","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/mysql%e9%96%a2%e6%95%b0%e3%81%aeifnull%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%e3%81%af\/"},"modified":"2024-04-04T13:29:42","modified_gmt":"2024-04-04T04:29:42","slug":"mysql%e9%96%a2%e6%95%b0%e3%81%aeifnull%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%e3%81%af","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/mysql%e9%96%a2%e6%95%b0%e3%81%aeifnull%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%e3%81%af\/","title":{"rendered":"MySQL\u95a2\u6570\u306eIFNULL\u306e\u4f7f\u3044\u65b9\u306f?"},"content":{"rendered":"<p>IFNULL \u95a2\u6570\u306f\u3001\u5f0f\u306e\u5024\u304c NULL \u306e\u5834\u5408\u306f\u6307\u5b9a\u3057\u305f\u4ee3\u66ff\u5024\u3092\u8fd4\u3057\u3001\u305d\u3046\u3067\u306a\u3044\u5834\u5408\u306f\u5143\u306e\u5024\u3092\u8fd4\u3059 MySQL \u95a2\u6570\u3067\u3059\u3002<\/p>\n<p>IFNULL\u95a2\u6570\u306e\u69cb\u6587\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002<br \/>\nIFNULL(expr1, expr2)<\/p>\n<p>expr1\u304c\u691c\u67fb\u3055\u308c\u308b\u5f0f\u3068\u306a\u308a\u3001expr1\u304cNULL\u306e\u5834\u5408\u3001expr2\u3092\u8fd4\u5374\u3001expr1\u304cNULL\u3067\u306a\u3044\u5834\u5408\u306fexpr1\u3092\u8fd4\u5374\u3059\u308b<\/p>\n<p>\u4f8b\uff1a<br \/>\nSELECT IFNULL(\u5217\u540d, &#8216;\u7f6e\u304d\u63db\u3048\u5024&#8217;) FROM \u30c6\u30fc\u30d6\u30eb\u540d<\/p>\n<p>\u4e0a\u8a18\u306e\u30af\u30a8\u30ea\u3067\u306f\u3001column_name \u5217\u306e\u7d50\u679c\u30bb\u30c3\u30c8\u304c\u8fd4\u3055\u308c\u307e\u3059\u3002column_name \u306e\u5024\u304c NULL \u306e\u5834\u5408\u3001\u6307\u5b9a\u3055\u308c\u305f\u4ee3\u66ff\u5024\u304c\u8fd4\u3055\u308c\u307e\u3059\u3002column_name \u306e\u5024\u304c NULL \u3067\u306a\u3044\u5834\u5408\u3001\u5143\u306e\u5024\u304c\u8fd4\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>ifnull\u95a2\u6570\u306f\u5f0f\u30921\u3064\u3057\u304b\u8abf\u3079\u3089\u308c\u306a\u3044\u306e\u3067\u3001\u8907\u6570\u306e\u5f0f\u304cNULL\u304b\u3069\u3046\u304b\u3092\u8abf\u3079\u305f\u3044\u5834\u5408\u306fcoalesce\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>IFNULL \u95a2\u6570\u306f\u3001\u5f0f\u306e\u5024\u304c NULL \u306e\u5834\u5408\u306f\u6307\u5b9a\u3057\u305f\u4ee3\u66ff\u5024\u3092\u8fd4\u3057\u3001\u305d\u3046\u3067\u306a\u3044\u5834\u5408\u306f\u5143\u306e\u5024\u3092\u8fd4\u3059 MySQL \u95a2\u6570\u3067\u3059\u3002 IFNULL\u95a2\u6570\u306e\u69cb\u6587\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002 IFNULL(expr1, expr2) expr1 [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-101211","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"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>MySQL\u95a2\u6570\u306eIFNULL\u306e\u4f7f\u3044\u65b9\u306f? - Blog - Silicon Cloud<\/title>\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\/ja\/blog\/mysql\u95a2\u6570\u306eifnull\u306e\u4f7f\u3044\u65b9\u306f\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"MySQL\u95a2\u6570\u306eIFNULL\u306e\u4f7f\u3044\u65b9\u306f?\" \/>\n<meta property=\"og:description\" content=\"IFNULL \u95a2\u6570\u306f\u3001\u5f0f\u306e\u5024\u304c NULL \u306e\u5834\u5408\u306f\u6307\u5b9a\u3057\u305f\u4ee3\u66ff\u5024\u3092\u8fd4\u3057\u3001\u305d\u3046\u3067\u306a\u3044\u5834\u5408\u306f\u5143\u306e\u5024\u3092\u8fd4\u3059 MySQL \u95a2\u6570\u3067\u3059\u3002 IFNULL\u95a2\u6570\u306e\u69cb\u6587\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002 IFNULL(expr1, expr2) expr1 [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/mysql\u95a2\u6570\u306eifnull\u306e\u4f7f\u3044\u65b9\u306f\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-21T18:38:35+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-04-04T04:29:42+00:00\" \/>\n<meta name=\"author\" content=\"\u84ee, \u7ffc\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u57f7\u7b46\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u84ee, \u7ffc\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/ja\/blog\/mysql%e9%96%a2%e6%95%b0%e3%81%aeifnull%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%e3%81%af\/\",\"url\":\"https:\/\/www.silicloud.com\/ja\/blog\/mysql%e9%96%a2%e6%95%b0%e3%81%aeifnull%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%e3%81%af\/\",\"name\":\"MySQL\u95a2\u6570\u306eIFNULL\u306e\u4f7f\u3044\u65b9\u306f? 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