{"id":8210,"date":"2024-03-15T00:04:57","date_gmt":"2024-03-14T15:04:57","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/mysql%e3%81%aesum%e9%96%a2%e6%95%b0%e3%81%8cnull%e3%82%92%e8%bf%94%e3%81%99%e5%a0%b4%e5%90%88%e3%80%81%e3%81%a9%e3%81%ae%e3%82%88%e3%81%86%e3%81%ab%e5%af%be%e5%87%a6%e3%81%99%e3%82%8c%e3%81%b0\/"},"modified":"2025-08-03T18:52:34","modified_gmt":"2025-08-03T09:52:34","slug":"mysql%e3%81%aesum%e9%96%a2%e6%95%b0%e3%81%8cnull%e3%82%92%e8%bf%94%e3%81%99%e5%a0%b4%e5%90%88%e3%80%81%e3%81%a9%e3%81%ae%e3%82%88%e3%81%86%e3%81%ab%e5%af%be%e5%87%a6%e3%81%99%e3%82%8c%e3%81%b0","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/mysql%e3%81%aesum%e9%96%a2%e6%95%b0%e3%81%8cnull%e3%82%92%e8%bf%94%e3%81%99%e5%a0%b4%e5%90%88%e3%80%81%e3%81%a9%e3%81%ae%e3%82%88%e3%81%86%e3%81%ab%e5%af%be%e5%87%a6%e3%81%99%e3%82%8c%e3%81%b0\/","title":{"rendered":"MySQL SUM\u95a2\u6570\u304cNULL\u3092\u8fd4\u3059\uff1f\u5bfe\u51e6\u6cd5\u3068\u6ce8\u610f\u70b9"},"content":{"rendered":"

MySQL\u3067SUM\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066NULL\u304c\u8fd4\u3055\u308c\u308b\u5834\u5408\u3001\u901a\u5e38\u306f\u5bfe\u5fdc\u3059\u308b\u5217\u306b\u30c7\u30fc\u30bf\u304c\u306a\u3044\u304b\u3001\u307e\u305f\u306fNULL\u5024\u304c\u5b58\u5728\u3059\u308b\u305f\u3081\u3067\u3059\u3002\u89e3\u6c7a\u65b9\u6cd5\u306b\u306f\u4ee5\u4e0b\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

    \n
  1. IFNULL\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001SUM\u95a2\u6570\u5185\u3067NULL\u5024\u30920\u306b\u7f6e\u304d\u63db\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001<\/li>\n<\/ol>\n
    SELECT<\/span> SUM<\/span>(IFNULL(column_name, 0<\/span>)) FROM<\/span> table_name;\r\n<\/code><\/pre>\n
      \n
    1. COALESCE\u95a2\u6570\u306e\u4f7f\u7528: SUM\u95a2\u6570\u3067COALESCE\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u3001NULL\u5024\u30920\u306b\u7f6e\u304d\u63db\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4f8b\u3048\u3070\uff1a<\/li>\n<\/ol>\n
      SELECT<\/span> SUM<\/span>(COALESCE<\/span>(column_name, 0<\/span>)) FROM<\/span> table_name;\r\n<\/code><\/pre>\n
        \n
      1. \u30c7\u30fc\u30bf\u3092\u30c1\u30a7\u30c3\u30af\u3057\u3066\u3001\u5bfe\u5fdc\u3059\u308b\u5217\u306b\u30c7\u30fc\u30bf\u304c\u5b58\u5728\u3059\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3001\u30c7\u30fc\u30bf\u304c\u306a\u3044\u5834\u5408\u3084NULL\u5024\u304c\u3042\u308b\u5834\u5408\u306f\u3001\u30c7\u30fc\u30bf\u3092\u66f4\u65b0\u3057\u305f\u308a\u65b0\u3057\u3044\u30c7\u30fc\u30bf\u3092\u633f\u5165\u3059\u308b\u3053\u3068\u3067\u554f\u984c\u3092\u89e3\u6c7a\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ol>\n
        \u4e0a\u8a18\u306e\u65b9\u6cd5\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001MySQL\u306b\u304a\u3051\u308bSUM\u95a2\u6570\u304cNULL\u3092\u8fd4\u3059\u554f\u984c\u3092\u89e3\u6c7a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
        MySQL\u3067SUM\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066NULL\u304c\u8fd4\u3055\u308c\u308b\u5834\u5408\u3001\u901a\u5e38\u306f\u5bfe\u5fdc\u3059\u308b\u5217\u306b\u30c7\u30fc\u30bf\u304c\u306a\u3044\u304b\u3001\u307e\u305f\u306fNULL\u5024\u304c\u5b58\u5728\u3059\u308b\u305f\u3081\u3067\u3059\u3002\u89e3\u6c7a\u65b9\u6cd5\u306b\u306f\u4ee5\u4e0b\u304c\u3042\u308a\u307e\u3059\u3002 IFNULL\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001SUM\u95a2\u6570\u5185\u3067NULL\u5024\u30920\u306b […]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[117,933,119,758,14],"class_list":["post-8210","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-mysql","tag-null","tag-sql","tag-sum","tag-14"],"yoast_head":"\nMySQL SUM\u95a2\u6570\u304cNULL\u3092\u8fd4\u3059\uff1f\u5bfe\u51e6\u6cd5\u3068\u6ce8\u610f\u70b9 - 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