{"id":135897,"date":"2024-03-26T13:21:28","date_gmt":"2024-03-26T04:21:28","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/oracle%e3%81%ae%e9%87%8d%e8%a4%87%e9%99%a4%e5%8e%bb%e6%89%8b%e6%b3%95\/"},"modified":"2024-03-28T10:27:07","modified_gmt":"2024-03-28T01:27:07","slug":"oracle%e3%81%ae%e9%87%8d%e8%a4%87%e9%99%a4%e5%8e%bb%e6%89%8b%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/oracle%e3%81%ae%e9%87%8d%e8%a4%87%e9%99%a4%e5%8e%bb%e6%89%8b%e6%b3%95\/","title":{"rendered":"Oracle\u306e\u91cd\u8907\u9664\u53bb\u624b\u6cd5"},"content":{"rendered":"

Oracle\u3067\u306f\u3001\u91cd\u8907\u6392\u9664\u3092\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u884c\u3044\u307e\u3059\u3002<\/p>\n

    \n
  1. SELECT \u6587\u306b DISTINCT \u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u91cd\u8907\u3057\u305f\u30ec\u30b3\u30fc\u30c9\u3092\u524a\u9664\u3067\u304d\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001SELECT DISTINCT column_name FROM table_name;<\/li>\n
  2. GROUP BY\u53e5\u3092\u4f7f\u7528\u3059\u308b\uff1a\u3068\u3042\u308b\u30d5\u30a3\u30fc\u30eb\u30c9\u3067\u30b0\u30eb\u30fc\u30d7\u5316\u3057\u3001SELECT\u53e5\u3067\u5fc5\u8981\u306a\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u9078\u629e\u3059\u308b\u3002\u4f8b\uff1aSELECT column_name FROM table_name GROUP BY column_name;<\/li>\n
  3. ROW_NUMBER()\u95a2\u6570\u306f\u5404\u7d50\u679c\u884c\u306b\u4e00\u610f\u7684\u884c\u756a\u53f7\u3092\u5272\u308a\u5f53\u3066\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002SELECT\u6587\u3067ROW_NUMBER()\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u91cd\u8907\u884c\u3092\u9664\u5916\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4f8b\u3048\u3070\uff1aSELECT column_name FROM (SELECT column_name, ROW_NUMBER() OVER(PARTITION BY column_name ORDER BY column_name) AS rn FROM table_name) WHERE rn = 1;<\/li>\n
  4. UNION\u307e\u305f\u306fUNION ALL\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\u3057\u305f\u7d50\u679c\u306e\u7d50\u5408\uff1aUNION\u307e\u305f\u306fUNION ALL\u6f14\u7b97\u5b50\u3092\u4f7f\u7528\u3057\u3066\u30012\u3064\u4ee5\u4e0a\u306eSELECT\u6587\u306e\u7d50\u679c\u3092\u3001\u91cd\u8907\u3092\u81ea\u52d5\u7684\u306b\u524a\u9664\u3057\u3066\u7d50\u5408\u3067\u304d\u307e\u3059\u3002UNION\u6f14\u7b97\u5b50\u306f\u91cd\u8907\u3092\u524a\u9664\u3057\u307e\u3059\u304c\u3001UNION ALL\u6f14\u7b97\u5b50\u306f\u91cd\u8907\u3092\u524a\u9664\u3057\u307e\u305b\u3093\u3002\u4f8b\uff1aSELECT column_name FROM table1 UNION SELECT column_name FROM table2;<\/li>\n<\/ol>\n

    \u5fc5\u8981\u306b\u5fdc\u3058\u3066\u6700\u9069\u306e\u91cd\u8907\u6392\u9664\u64cd\u4f5c\u3092\u884c\u3046\u65b9\u6cd5\u3092\u9078\u629e\u3067\u304d\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

    Oracle\u3067\u306f\u3001\u91cd\u8907\u6392\u9664\u3092\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u884c\u3044\u307e\u3059\u3002 SELECT \u6587\u306b DISTINCT \u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u91cd\u8907\u3057\u305f\u30ec\u30b3\u30fc\u30c9\u3092\u524a\u9664\u3067\u304d\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001SELECT DISTINCT column_name FROM […]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-135897","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\nOracle\u306e\u91cd\u8907\u9664\u53bb\u624b\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\u306e\u91cd\u8907\u9664\u53bb\u624b\u6cd5\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Oracle\u306e\u91cd\u8907\u9664\u53bb\u624b\u6cd5\" \/>\n<meta property=\"og:description\" content=\"Oracle\u3067\u306f\u3001\u91cd\u8907\u6392\u9664\u3092\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u884c\u3044\u307e\u3059\u3002 SELECT \u6587\u306b DISTINCT \u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u91cd\u8907\u3057\u305f\u30ec\u30b3\u30fc\u30c9\u3092\u524a\u9664\u3067\u304d\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001SELECT DISTINCT column_name FROM […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/oracle\u306e\u91cd\u8907\u9664\u53bb\u624b\u6cd5\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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