{"id":121042,"date":"2024-03-24T01:03:59","date_gmt":"2024-03-23T16:03:59","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/oracle%e3%81%aedecode%e9%96%a2%e6%95%b0%e3%81%ae%e4%bd%bf%e7%94%a8%e6%96%b9%e6%b3%95\/"},"modified":"2024-04-05T09:53:09","modified_gmt":"2024-04-05T00:53:09","slug":"oracle%e3%81%aedecode%e9%96%a2%e6%95%b0%e3%81%ae%e4%bd%bf%e7%94%a8%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/oracle%e3%81%aedecode%e9%96%a2%e6%95%b0%e3%81%ae%e4%bd%bf%e7%94%a8%e6%96%b9%e6%b3%95\/","title":{"rendered":"Oracle\u306eDECODE\u95a2\u6570\u306e\u4f7f\u7528\u65b9\u6cd5"},"content":{"rendered":"

\u30aa\u30e9\u30af\u30eb\u306eDECODE\u95a2\u6570\u306f\u6761\u4ef6\u5f0f\u306e\u8a55\u4fa1\u7d50\u679c\u306b\u3088\u3063\u3066\u7570\u306a\u308b\u5024\u3092\u8fd4\u3059\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u305d\u306e\u57fa\u672c\u7684\u306a\u69cb\u6587\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n

DECODE(expr \u691c\u7d22\u6761\u4ef61 \u7d50\u679c1[, \u691c\u7d22\u6761\u4ef62 \u7d50\u679c2, \u2026, \u30c7\u30d5\u30a9\u30eb\u30c8])<\/p>\n

\u6761\u4ef6\u5f0f\u3092\u8a55\u4fa1\u3059\u308b\u5f0fexpr\u3001\u7167\u5408\u3059\u308b\u5024search1\u3001search2\u306a\u3069\u3001\u7167\u5408\u6210\u529f\u6642\u306e\u623b\u308a\u5024result1\u3001result2\u306a\u3069\u3092\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u3057\u3066\u3068\u308a\u3001\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u623b\u308a\u5024\u3068\u3057\u3066default\u3092\u3068\u308a\u307e\u3059\u3002<\/p>\n

DECODE \u95a2\u6570\u306f\u3001search1\u3001search2 \u306a\u3069\u3092\u9806\u6b21\u7167\u5408\u3057\u3001expr \u306e\u5024\u304c\u4e00\u81f4\u3057\u305f search \u306e\u5024\u3092\u8fd4\u3057\u307e\u3059\u3002\u4e00\u81f4\u3059\u308b search \u304c\u306a\u3051\u308c\u3070\u3001default \u306e\u5024\u3092\u8fd4\u3057\u307e\u3059\uff08default \u304c\u6307\u5b9a\u3055\u308c\u306a\u3051\u308c\u3070\u30cc\u30eb\u3092\u8fd4\u3057\u307e\u3059\uff09\u3002<\/p>\n

DECODE\u95a2\u6570 \u306f \u69d8\u3005\u306a \u30b1\u30fc\u30b9 \u3067 \u5229\u7528 \u53ef\u80fd \u3067\u3059\u3002<\/p>\n

    \n
  1. \u3042\u308b\u5217\u306e\u5024\u3092\u5225\u306e\u7d50\u679c\u306b\u30de\u30c3\u30d4\u30f3\u30b0\u3059\u308b\uff1a<\/li>\n<\/ol>\n

    SELECT name, CASE WHEN type=’A’ THEN ‘Apple’ WHEN type=’B’ THEN ‘Banana’ WHEN type=’C’ THEN ‘Cherry’ ELSE ‘Unknown’ END AS fruit<\/p>\n

    \u30d5\u30eb\u30fc\u30c4\u304b\u3089<\/p>\n

    \u3053\u306e\u4f8b\u3067\u306f\u3001type\u5217\u306e\u3055\u307e\u3056\u307e\u306a\u5024\u306b\u57fa\u3065\u3044\u3066\u3001\u5bfe\u5fdc\u3059\u308b\u30d5\u30eb\u30fc\u30c4\u540d\u306b\u30de\u30c3\u30d4\u30f3\u30b0\u3057\u307e\u3059\u3002type\u306e\u5024\u304c’A’\u3001’B’\u3001\u307e\u305f\u306f’C’\u3067\u306f\u306a\u3044\u5834\u5408\u306f\u3001’\u4e0d\u660e’\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n

      \n
    1. \u6761\u4ef6\u306b\u3088\u3063\u3066\u7570\u306a\u308b\u7d50\u679c\u3092\u8fd4\u3059<\/li>\n<\/ol>\n

      SELECT name, DECODE(score, 90, \u2018A\u2019, 80, \u2018B\u2019, 70, \u2018C\u2019, \u2018D\u2019) AS grade<\/p>\n

      \u751f\u5f92\u305f\u3061\u304b\u3089<\/p>\n

      \u3053\u306e\u4f8b\u3067\u306f\u3001score\u5217\u306e\u30b9\u30b3\u30a2\u306b\u5fdc\u3058\u3066\u5b66\u5e74\u306e\u6210\u7e3e\u3092\u5224\u5b9a\u3057\u307e\u3059\u3002\u30b9\u30b3\u30a2\u304c90\u306e\u5834\u5408\u306f\u300cA\u300d\u3001\u30b9\u30b3\u30a2\u304c80\u306e\u5834\u5408\u306f\u300cB\u300d\u3092\u8fd4\u3057\u307e\u3059\u3002\u305d\u306e\u4ed6\u306e\u30b9\u30b3\u30a2\u306e\u5834\u5408\u306f\u300cD\u300d\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n

      \u8907\u96d1\u306aCASE\u5f0f\u3092\u30b7\u30f3\u30d7\u30eb\u306b\u3059\u308bDECODE\u95a2\u6570\u306f\u3001\u554f\u3044\u5408\u308f\u305b\u306e\u53ef\u8aad\u6027\u3068\u52b9\u7387\u3092\u9ad8\u3081\u307e\u3059\u3002\u305f\u3060\u3057\u3001DECODE\u95a2\u6570\u306fOracle\u56fa\u6709\u306e\u95a2\u6570\u3067\u3042\u308a\u3001\u4ed6\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b7\u30b9\u30c6\u30e0\u3067\u306f\u5bfe\u5fdc\u3059\u308b\u95a2\u6570\u304c\u306a\u3044\u53ef\u80fd\u6027\u304c\u3042\u308b\u3053\u3068\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

      \u30aa\u30e9\u30af\u30eb\u306eDECODE\u95a2\u6570\u306f\u6761\u4ef6\u5f0f\u306e\u8a55\u4fa1\u7d50\u679c\u306b\u3088\u3063\u3066\u7570\u306a\u308b\u5024\u3092\u8fd4\u3059\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u305d\u306e\u57fa\u672c\u7684\u306a\u69cb\u6587\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002 DECODE(expr \u691c\u7d22\u6761\u4ef61 \u7d50\u679c1[, \u691c\u7d22\u6761\u4ef62 \u7d50\u679c2, \u2026, \u30c7\u30d5\u30a9\u30eb\u30c8]) \u6761\u4ef6\u5f0f […]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-121042","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\nOracle\u306eDECODE\u95a2\u6570\u306e\u4f7f\u7528\u65b9\u6cd5 - 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\/oracle\u306edecode\u95a2\u6570\u306e\u4f7f\u7528\u65b9\u6cd5\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Oracle\u306eDECODE\u95a2\u6570\u306e\u4f7f\u7528\u65b9\u6cd5\" \/>\n<meta property=\"og:description\" content=\"\u30aa\u30e9\u30af\u30eb\u306eDECODE\u95a2\u6570\u306f\u6761\u4ef6\u5f0f\u306e\u8a55\u4fa1\u7d50\u679c\u306b\u3088\u3063\u3066\u7570\u306a\u308b\u5024\u3092\u8fd4\u3059\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u305d\u306e\u57fa\u672c\u7684\u306a\u69cb\u6587\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002 DECODE(expr \u691c\u7d22\u6761\u4ef61 \u7d50\u679c1[, \u691c\u7d22\u6761\u4ef62 \u7d50\u679c2, \u2026, \u30c7\u30d5\u30a9\u30eb\u30c8]) \u6761\u4ef6\u5f0f […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/oracle\u306edecode\u95a2\u6570\u306e\u4f7f\u7528\u65b9\u6cd5\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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