{"id":335,"date":"2022-06-28T12:15:31","date_gmt":"2022-06-28T03:15:31","guid":{"rendered":"https:\/\/dozzing.kr\/wordpress\/?p=335"},"modified":"2025-10-24T11:53:14","modified_gmt":"2025-10-24T02:53:14","slug":"mysql-%ec%98%a4%ed%94%84%eb%9d%bc%ec%9d%b8-%ec%98%a8%eb%9d%bc%ec%9d%b8-%ed%8c%90%eb%a7%a4-%eb%8d%b0%ec%9d%b4%ed%84%b0-%ed%86%b5%ed%95%a9%ed%95%98%ea%b8%b0-%e2%ad%90%e2%ad%90%e2%ad%90%e2%ad%90","status":"publish","type":"post","link":"https:\/\/blog.dozzing.kr\/?p=335","title":{"rendered":"[MYSQL] \uc624\ud504\ub77c\uc778\/\uc628\ub77c\uc778 \ud310\ub9e4 \ub370\uc774\ud130 \ud1b5\ud569\ud558\uae30 \u2b50\u2b50\u2b50\u2b50 \u2013 \ud504\ub85c\uadf8\ub798\uba38\uc2a4"},"content":{"rendered":"

\ud83d\udcab \ubb38\uc81c<\/h2>\n

\"\"<\/a>
\n\"\"<\/a>
\n\u00a0<\/p>\n

\ud83d\udcab CODE<\/h2>\n
SELECT DATE_FORMAT(SALES_DATE, '%Y-%m-%d') AS SALES_DATE, PRODUCT_ID, USER_ID, SALES_AMOUNT\nFROM (\n  SELECT SALES_DATE, PRODUCT_ID, USER_ID, SALES_AMOUNT\n  FROM ONLINE_SALE\n  WHERE EXTRACT(YEAR FROM SALES_DATE) = 2022 AND EXTRACT(MONTH FROM SALES_DATE) = 3\n  UNION ALL\n  SELECT SALES_DATE, PRODUCT_ID, NULL AS USER_ID, SALES_AMOUNT\n  FROM OFFLINE_SALE\n  WHERE EXTRACT(YEAR FROM SALES_DATE) = 2022 AND EXTRACT(MONTH FROM SALES_DATE) = 3\n) AS ONLINE_OFFLINE_SALE\nORDER BY SALES_DATE ASC, PRODUCT_ID ASC, COALESCE(USER_ID, -1) ASC;\n<\/code><\/pre>\n
\u00a0<\/p>\n
\ud83d\udcab \ud480\uc774 \uc870\uac74<\/h2>\n
1. 2022\ub144 3\uc6d4\uc758 \uc624\ud504\ub77c\uc778\/\uc628\ub77c\uc778 \uc0c1\ud488 \ud310\ub9e4 \ub370\uc774\ud130<\/h5>\n
2. \ud310\ub9e4 \ub0a0\uc9dc, \uc0c1\ud488ID, \uc720\uc800ID, \ud310\ub9e4\ub7c9 \ucd9c\ub825<\/h5>\n
3. OFFLINE_SALE \ud14c\uc774\ube14\uc758 \ud310\ub9e4 \ub370\uc774\ud130\uc758 USER_ID \uac12\uc740 NULL \ub85c \ud45c\uc2dc<\/h5>\n
4. \ud310\ub9e4\uc77c\uc744 \uae30\uc900\uc73c\ub85c \uc624\ub984\ucc28\uc21c \uc815\ub82c\ud574\uc8fc\uc2dc\uace0 \ud310\ub9e4\uc77c\uc774 \uac19\ub2e4\uba74 \uc0c1\ud488 ID\ub97c \uae30\uc900\uc73c\ub85c \uc624\ub984\ucc28\uc21c, \uc0c1\ud488ID\uae4c\uc9c0 \uac19\ub2e4\uba74 \uc720\uc800 ID\ub97c \uae30\uc900\uc73c\ub85c \uc624\ub984\ucc28\uc21c \uc815\ub82c<\/h5>\n
\u00a0<\/p>\n
\ud83d\udcab \ud480\uc774<\/h2>\n
1. SELECT DATE_FORMAT(SALES_DATE, '%Y-%m-%d') AS SALES_DATE, PRODUCT_ID, USER_ID, SALES_AMOUNT<\/h5>\n
    \n
  • \ud310\ub9e4 \ub0a0\uc9dc(SALES_DATE), \uc0c1\ud488ID(PRODUCT_ID), \uc720\uc800ID(USER_ID), \ud310\ub9e4\ub7c9(SALES_AMOUNT) \uc870\ud68c<\/li>\n
  • DATE_FORMAT(SALES_DATE, '%Y-%m-%d')\uc744 \uc774\uc6a9\ud574\uc11c \ud310\ub9e4 \ub0a0\uc9dc(SALES_DATE)\uac00 \ub144-\uc6d4-\uc77c \uae4c\uc9c0\ub9cc \ub098\uc624\ub3c4\ub85d<\/li>\n<\/ul>\n
    2. FROM () AS ONLINE_OFFLINE_SALE<\/h5>\n
      \n
    • FROM\uc808\uc5d0 AS\ub97c \uc0ac\uc6a9\ud558\uc5ec ONLINE_OFFLINE_SALE \ubcc4\uce6d \uc9c0\uc815<\/li>\n<\/ul>\n
      3. SELECT SALES_DATE, PRODUCT_ID, USER_ID, SALES_AMOUNT FROM ONLINE_SALE WHERE EXTRACT(YEAR FROM SALES_DATE) = 2022 AND EXTRACT(MONTH FROM SALES_DATE) = 3<\/h5>\n
        \n
      • ONLINE_SALE \ud14c\uc774\ube14\uc758 \ud310\ub9e4 \ub0a0\uc9dc(SALES_DATE), \uc0c1\ud488ID(PRODUCT_ID), \uc720\uc800ID(USER_ID), \ud310\ub9e4\ub7c9(SALES_AMOUNT) \uc870\ud68c<\/li>\n
      • EXTRACT()\ub97c \uc0ac\uc6a9\ud558\uc5ec \ub144\ub3c4, \uc6d4 \uc9c0\uc815<\/li>\n<\/ul>\n
        4. UNION ALL<\/h5>\n
          \n
        • \ucffc\ub9ac\uc758 \uacb0\uacfc\ub97c \ud569\uccd0\uc90c, \uc911\ubcf5\uc81c\uac70 x. <-> UNION\ub9cc \uc37c\uc744\ub54c\ub294 \uc911\ubcf5 \uc81c\uac70 O<\/li>\n<\/ul>\n
          5. SELECT SALES_DATE, PRODUCT_ID, NULL AS USER_ID, SALES_AMOUNT FROM OFFLINE_SALE WHERE EXTRACT(YEAR FROM SALES_DATE) = 2022 AND EXTRACT(MONTH FROM SALES_DATE) = 3<\/h5>\n
            \n
          • ONLINE_SALE \ud14c\uc774\ube14\uc758 \ud310\ub9e4 \ub0a0\uc9dc(SALES_DATE), \uc720\uc800ID(USER_ID), \ud310\ub9e4\ub7c9(SALES_AMOUNT) \uc870\ud68c<\/li>\n
          • NULL\uac12\uc758 \ubcc4\uce6d\uc744 USER_ID\ub85c \uc9c0\uc815<\/li>\n
          • EXTRACT()\ub97c \uc0ac\uc6a9\ud558\uc5ec \ub144\ub3c4, \uc6d4 \uc9c0\uc815<\/li>\n<\/ul>\n
            6. ORDER BY SALES_DATE ASC, PRODUCT_ID ASC, COALESCE(USER_ID, -1) ASC<\/h5>\n
              \n
            • \ud310\ub9e4\uc77c(SALES_DATE)\uc744 \uae30\uc900\uc73c\ub85c \uc624\ub984\ucc28\uc21c \uc815\ub82c, \ud310\ub9e4\uc77c(SALES_DATE)\uc774 \uac19\ub2e4\uba74 \uc0c1\ud488ID(PRODUCT_ID)\ub97c \uae30\uc900\uc73c\ub85c \uc624\ub984\ucc28\uc21c, \uc0c1\ud488ID(PRODUCT_ID)\uae4c\uc9c0 \uac19\ub2e4\uba74 \uc720\uc800ID(USER_ID)\ub97c \uae30\uc900\uc73c\ub85c \uc624\ub984\ucc28\uc21c \uc815\ub82c
              \n-COALESCE()\ud568\uc218\ub97c \uc774\uc6a9\ud558\uc5ec USER_ID\uac00 NULL\uc774 \uc544\ub2c8\uba74 USER_ID\ub97c \ubc18\ud658\ud558\uace0, NULL\uc774\ub77c\uba74 -1\uc744 \ubc18\ud658\ud558\uc5ec \uc624\ub984\ucc28\uc21c \uc815\ub82c\uc744 \ud558\ub3c4\ub85d<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"
              \ud83d\udcab \ubb38\uc81c \u00a0 \ud83d\udcab CODE SELECT DATE_FORMAT(SALES_DATE, ‘%Y-%m-%d’) AS SALES_DATE, PRODUCT_ID, USER_ID, SALES_AMOUNT FROM ( SELECT SALES_DATE, PRODUCT_ID, USER_ID, SALES_AMOUNT FROM ONLINE_SALE WHERE EXTRACT(YEAR FROM SALES_DATE) = 2022 AND EXTRACT(MONTH FROM SALES_DATE) = 3 UNION ALL SELECT SALES_DATE, PRODUCT_ID, NULL AS USER_ID, SALES_AMOUNT FROM OFFLINE_SALE WHERE EXTRACT(YEAR FROM SALES_DATE) = 2022 AND EXTRACT(MONTH FROM SALES_DATE) […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,9],"tags":[28,25,17,7,12,11,16,15,24,10],"class_list":{"0":"post-335","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"hentry","6":"category-database","7":"category-sql","8":"tag-28","9":"tag-coalesce","10":"tag-database","11":"tag-db","12":"tag-mysql","13":"tag-programmers","14":"tag-sql","16":"tag-union","17":"tag-10"},"yoast_head":"\n[MYSQL] \uc624\ud504\ub77c\uc778\/\uc628\ub77c\uc778 \ud310\ub9e4 \ub370\uc774\ud130 \ud1b5\ud569\ud558\uae30 \u2b50\u2b50\u2b50\u2b50 \u2013 \ud504\ub85c\uadf8\ub798\uba38\uc2a4 - Dozzing World<\/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:\/\/blog.dozzing.kr\/?p=335\" \/>\n<meta property=\"og:locale\" content=\"ko_KR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[MYSQL] \uc624\ud504\ub77c\uc778\/\uc628\ub77c\uc778 \ud310\ub9e4 \ub370\uc774\ud130 \ud1b5\ud569\ud558\uae30 \u2b50\u2b50\u2b50\u2b50 \u2013 \ud504\ub85c\uadf8\ub798\uba38\uc2a4 - Dozzing World\" \/>\n<meta property=\"og:description\" content=\"\ud83d\udcab \ubb38\uc81c \u00a0 \ud83d\udcab CODE SELECT DATE_FORMAT(SALES_DATE, '%Y-%m-%d') AS SALES_DATE, PRODUCT_ID, USER_ID, SALES_AMOUNT FROM ( SELECT SALES_DATE, PRODUCT_ID, USER_ID, SALES_AMOUNT FROM ONLINE_SALE WHERE EXTRACT(YEAR FROM SALES_DATE) = 2022 AND EXTRACT(MONTH FROM SALES_DATE) = 3 UNION ALL SELECT SALES_DATE, PRODUCT_ID, NULL AS USER_ID, SALES_AMOUNT FROM OFFLINE_SALE WHERE EXTRACT(YEAR FROM SALES_DATE) = 2022 AND EXTRACT(MONTH FROM SALES_DATE) […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blog.dozzing.kr\/?p=335\" \/>\n<meta property=\"og:site_name\" content=\"Dozzing World\" \/>\n<meta property=\"article:published_time\" content=\"2022-06-28T03:15:31+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-10-24T02:53:14+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/blog.dozzing.kr\/wp-content\/uploads\/2023\/06\/wp_editor_md_993ef0e7298c436326b2271c25e0a8aa.jpg\" \/>\n<meta name=\"author\" content=\"Dozzing\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\uae00\uc4f4\uc774\" \/>\n\t<meta name=\"twitter:data1\" content=\"Dozzing\" \/>\n\t<meta name=\"twitter:label2\" content=\"\uc608\uc0c1 \ub418\ub294 \ud310\ub3c5 \uc2dc\uac04\" \/>\n\t<meta name=\"twitter:data2\" content=\"2\ubd84\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/blog.dozzing.kr\/?p=335\",\"url\":\"https:\/\/blog.dozzing.kr\/?p=335\",\"name\":\"[MYSQL] \uc624\ud504\ub77c\uc778\/\uc628\ub77c\uc778 \ud310\ub9e4 \ub370\uc774\ud130 \ud1b5\ud569\ud558\uae30 \u2b50\u2b50\u2b50\u2b50 \u2013 \ud504\ub85c\uadf8\ub798\uba38\uc2a4 - 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