{"id":477146,"date":"2023-08-09T09:08:09","date_gmt":"2023-08-09T09:08:09","guid":{"rendered":""},"modified":"2023-09-05T11:14:07","modified_gmt":"2023-09-05T11:14:07","slug":"execution-plan-sql","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/kr\/wiki\/execution-plan-sql\/","title":{"rendered":"\uc2e4\ud589 \uacc4\ud68d(SQL)"},"content":{"rendered":"

SQL(Structured Query Language) \ucee8\ud14d\uc2a4\ud2b8\uc758 \uc2e4\ud589 \uacc4\ud68d\uc740 \ub370\uc774\ud130\ubca0\uc774\uc2a4 \ucffc\ub9ac \uc131\ub2a5\uc744 \ucd5c\uc801\ud654\ud558\ub294 \ub370 \uc911\uc694\ud55c \uce21\uba74\uc785\ub2c8\ub2e4. \ud2b9\uc815 SQL \ucffc\ub9ac\ub97c \ud6a8\uc728\uc801\uc73c\ub85c \uc2e4\ud589\ud558\uae30 \uc704\ud574 \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uad00\ub9ac \uc2dc\uc2a4\ud15c(DBMS)\uc774 \ub530\ub974\ub294 \uc0c1\uc138\ud55c \ub85c\ub4dc\ub9f5\uc785\ub2c8\ub2e4. \uc2e4\ud589 \uacc4\ud68d\uc5d0\ub294 DBMS\uac00 \ucffc\ub9ac \uc694\uad6c \uc0ac\ud56d\uc744 \ucda9\uc871\ud558\uae30 \uc704\ud574 \ub370\uc774\ud130\ub97c \uac80\uc0c9, \uc870\uc778, \ud544\ud130\ub9c1 \ubc0f \ucc98\ub9ac\ud558\ub294 \ub370 \uc0ac\uc6a9\ud560 \ub2e8\uacc4\uc640 \uc791\uc5c5\uc774 \uac04\ub7b5\ud558\uac8c \uc124\uba85\ub418\uc5b4 \uc788\uc2b5\ub2c8\ub2e4. \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uad00\ub9ac\uc790\uc640 \uac1c\ubc1c\uc790\uac00 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc758 \uc131\ub2a5 \ubcd1\ubaa9 \ud604\uc0c1\uc744 \uc2dd\ubcc4\ud558\uace0 \ud574\uacb0\ud558\ub824\uba74 \uc2e4\ud589 \uacc4\ud68d\uc744 \uc774\ud574\ud558\ub294 \uac83\uc774 \ud544\uc218\uc801\uc785\ub2c8\ub2e4.<\/p>\n

SQL(Execution Plan)\uc758 \uc720\ub798\uc640 \ucd5c\ucd08 \uc5b8\uae09\uc758 \uc5ed\uc0ac<\/h2>\n

\uc2e4\ud589 \uacc4\ud68d\uc758 \uac1c\ub150\uc740 1970\ub144\ub300 \ud6c4\ubc18\uacfc 1980\ub144\ub300 \ucd08\ubc18\uc5d0 \uad00\uacc4\ud615 \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uad00\ub9ac \uc2dc\uc2a4\ud15c(RDBMS)\uc758 \uae30\ubcf8 \uad6c\uc131 \uc694\uc18c\ub85c \ub4f1\uc7a5\ud588\uc2b5\ub2c8\ub2e4. \uc774\ub294 \ub370\uc774\ud130\ubca0\uc774\uc2a4 \ucffc\ub9ac\uc758 \ubcf5\uc7a1\uc131 \uc99d\uac00\uc640 \ub354 \ub098\uc740 \uc131\ub2a5\uc744 \uc704\ud574 \uc2e4\ud589\uc744 \ucd5c\uc801\ud654\ud574\uc57c \ud558\ub294 \ud544\uc694\uc131\uc5d0 \ub300\ud55c \ub300\uc751\uc73c\ub85c \ubc1c\uc804\ud588\uc2b5\ub2c8\ub2e4.<\/p>\n

\uc2e4\ud589 \uacc4\ud68d\uc5d0 \ub300\ud55c \ucd5c\ucd08\uc758 \uc5b8\uae09 \uc911 \ud558\ub098\ub294 1970\ub144\ub300 \ucd08 IBM Research\uc758 System R \ud504\ub85c\uc81d\ud2b8 \uac1c\ubc1c\ub85c \uac70\uc2ac\ub7ec \uc62c\ub77c\uac11\ub2c8\ub2e4. System R\uc740 \ub9ce\uc740 \ucd5c\uc2e0 SQL \uae30\ubc18 \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uc2dc\uc2a4\ud15c\uc758 \ud1a0\ub300\ub97c \ub9c8\ub828\ud55c \uc120\uad6c\uc801\uc778 RDBMS\uc600\uc2b5\ub2c8\ub2e4. IBM\uc758 \uc5f0\uad6c\uc6d0\ub4e4\uc740 \ud6a8\uc728\uc801\uc778 \ucffc\ub9ac \uc2e4\ud589\uc758 \uc911\uc694\uc131\uc744 \uc778\uc2dd\ud558\uace0 \uc2e4\ud589 \uacc4\ud68d\uc744 \uc790\ub3d9\uc73c\ub85c \uc0dd\uc131\ud558\ub294 \uae30\uc220\uc744 \uace0\uc548\ud588\uc2b5\ub2c8\ub2e4.<\/p>\n

\uc2e4\ud589 \uacc4\ud68d(SQL)\uc5d0 \ub300\ud55c \uc0c1\uc138 \uc815\ubcf4<\/h2>\n

\uc2e4\ud589 \uacc4\ud68d\uc758 \uc8fc\uc694 \ubaa9\uc801\uc740 \uc6d0\ud558\ub294 \ucffc\ub9ac \uacb0\uacfc\ub97c \uc0dd\uc131\ud558\uae30 \uc704\ud574 \ub370\uc774\ud130\uc5d0 \uc561\uc138\uc2a4\ud558\uace0 \uc870\uc791\ud558\ub294 \ubc29\ubc95\uc5d0 \ub300\ud55c \ub2e8\uacc4\ubcc4 \uc9c0\uce68\uc744 \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uc5d4\uc9c4\uc5d0 \uc81c\uacf5\ud558\ub294 \uac83\uc785\ub2c8\ub2e4. \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uc5d4\uc9c4\uc740 \uc774\ub97c \ud6a8\uc728\uc801\uc73c\ub85c \uc218\ud589\ud558\uae30 \uc704\ud574 \ub2e4\uc591\ud55c \uc54c\uace0\ub9ac\uc998, \uc561\uc138\uc2a4 \ubc29\ubc95 \ubc0f \ucd5c\uc801\ud654 \uc804\ub7b5\uc744 \uc0ac\uc6a9\ud569\ub2c8\ub2e4.<\/p>\n

\ucffc\ub9ac\uac00 DBMS\uc5d0 \uc81c\ucd9c\ub418\uba74 \uc2e4\uc81c \ub370\uc774\ud130 \uac80\uc0c9 \ubc0f \ucc98\ub9ac\uac00 \uc774\ub8e8\uc5b4\uc9c0\uae30 \uc804\uc5d0 \uc5ec\ub7ec \ub2e8\uacc4\uc758 \ud504\ub85c\uc138\uc2a4\ub97c \uac70\uce69\ub2c8\ub2e4. \ud504\ub85c\uc138\uc2a4 \uac1c\uc694\ub294 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.<\/p>\n

    \n
  1. \n

    \uad6c\ubb38 \ubd84\uc11d:<\/strong> DBMS\ub294 \uba3c\uc800 SQL \ucffc\ub9ac\ub97c \uad6c\ubb38 \ubd84\uc11d\ud558\uc5ec \uad6c\ubb38 \ubc0f \uc758\ubbf8\uc758 \uc815\ud655\uc131\uc744 \ud655\uc778\ud569\ub2c8\ub2e4. \uc801\uc808\ud55c \ud14c\uc774\ube14 \ubc0f \uc5f4 \uc774\ub984, \uc62c\ubc14\ub978 \uad6c\ubb38 \ubc0f \uc720\ud6a8\ud55c \ucc38\uc870\ub97c \ud655\uc778\ud569\ub2c8\ub2e4.<\/p>\n<\/li>\n

  2. \n

    \ucd5c\uc801\ud654:<\/strong> \ucffc\ub9ac\uc758 \uc720\ud6a8\uc131\uc774 \uac80\uc0ac\ub418\uba74 \ucffc\ub9ac \ucd5c\uc801\ud654 \ud504\ub85c\uadf8\ub7a8\uc774 \uc791\ub3d9\ud569\ub2c8\ub2e4. \uc635\ud2f0\ub9c8\uc774\uc800\ub294 \ub2e4\uc591\ud55c \uc2e4\ud589 \uacc4\ud68d\uc744 \ud0d0\uc0c9\ud558\uace0 \uac00\uc7a5 \ud6a8\uc728\uc801\uc778 \uacc4\ud68d\uc744 \uc120\ud0dd\ud569\ub2c8\ub2e4. \uc0ac\uc6a9 \uac00\ub2a5\ud55c \uc778\ub371\uc2a4, \ud1b5\uacc4, \ub370\uc774\ud130\ubca0\uc774\uc2a4\uc758 \ud604\uc7ac \uc0c1\ud0dc\uc640 \uac19\uc740 \uc694\uc18c\ub97c \uace0\ub824\ud558\uc5ec \uc815\ubcf4\uc5d0 \uc785\uac01\ud55c \uacb0\uc815\uc744 \ub0b4\ub9bd\ub2c8\ub2e4.<\/p>\n<\/li>\n

  3. \n

    \uc2e4\ud589 \uacc4\ud68d \uc0dd\uc131:<\/strong> \ucd5c\uc801\ud654 \ud6c4 \uc120\ud0dd\ud55c \uc2e4\ud589 \uacc4\ud68d\uc774 \uc0dd\uc131\ub429\ub2c8\ub2e4. \uc2e4\ud589 \uacc4\ud68d\uc740 \uc77c\ubc18\uc801\uc73c\ub85c \ud2b8\ub9ac\ud615 \uad6c\uc870\ub85c \ud45c\uc2dc\ub418\uba70, \uac01 \ub178\ub4dc\ub294 \uc791\uc5c5(\uc608: \uac80\uc0c9, \uc870\uc778, \uc815\ub82c)\uc744 \ub098\ud0c0\ub0b4\uace0 \ub178\ub4dc \uac04 \uc5f0\uacb0\uc740 \ub370\uc774\ud130 \ud750\ub984\uc744 \ub098\ud0c0\ub0c5\ub2c8\ub2e4.<\/p>\n<\/li>\n

  4. \n

    \uc2e4\ud589:<\/strong> \uc2e4\ud589 \uacc4\ud68d\uc744 \uac16\uace0 DBMS\ub294 \uacc4\ud68d\uc5d0 \uc124\uba85\ub41c \ub2e8\uacc4\uc5d0 \ub530\ub77c \ucffc\ub9ac\ub97c \uc2e4\ud589\ud569\ub2c8\ub2e4. \uc2e4\ud589 \uc911\uc5d0 \uc5d4\uc9c4\uc740 \uc778\ub371\uc2a4 \ud0d0\uc0c9, \uc778\ub371\uc2a4 \uc2a4\uce94, \ud574\uc2dc \uc870\uc778, \uc911\ucca9 \ub8e8\ud504 \uc870\uc778, \uc815\ub82c\uacfc \uac19\uc740 \ub2e4\uc591\ud55c \uae30\uc220\uc744 \ud65c\uc6a9\ud558\uc5ec \ub370\uc774\ud130\ub97c \uac00\uc838\uc624\uace0 \ucc98\ub9ac\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<\/li>\n

  5. \n

    \uacb0\uacfc \uac80\uc0c9:<\/strong> \ub9c8\uc9c0\ub9c9\uc73c\ub85c \ucffc\ub9ac \uc5d4\uc9c4\uc740 \ucffc\ub9ac \uacb0\uacfc\ub97c \uac80\uc0c9\ud558\uc5ec \uc0ac\uc6a9\uc790\ub098 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc5d0 \uc81c\uacf5\ud569\ub2c8\ub2e4.<\/p>\n<\/li>\n<\/ol>\n

    \uc2e4\ud589 \uacc4\ud68d(SQL)\uc758 \ub0b4\ubd80 \uad6c\uc870 \u2013 \uc2e4\ud589 \uacc4\ud68d(SQL) \uc791\ub3d9 \ubc29\uc2dd<\/h2>\n

    \uc2e4\ud589 \uacc4\ud68d\uc758 \ub0b4\ubd80 \uad6c\uc870\ub294 \uae30\ubcf8 \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uc2dc\uc2a4\ud15c\uacfc \ud574\ub2f9 \ucffc\ub9ac \ucd5c\uc801\ud654 \ud504\ub85c\uadf8\ub7a8\uc5d0 \ub530\ub77c \ub2e4\ub985\ub2c8\ub2e4. \uadf8\ub7ec\ub098 \uae30\ubcf8 \uc6d0\uce59\uc740 \ub300\ubd80\ubd84\uc758 DBMS\uc5d0\uc11c \uc77c\uad00\ub418\uac8c \uc720\uc9c0\ub429\ub2c8\ub2e4.<\/p>\n

    \uc2e4\ud589 \uacc4\ud68d\uc740 \uc77c\ubc18\uc801\uc73c\ub85c \ud2b8\ub9ac\uc640 \uac19\uc740 \uad6c\uc870\ub85c \ud45c\uc2dc\ub429\ub2c8\ub2e4. \uc5ec\uae30\uc11c \uac01 \ub178\ub4dc\ub294 \ud2b9\uc815 \uc791\uc5c5\uc5d0 \ud574\ub2f9\ud558\uace0 \uac00\uc7a5\uc790\ub9ac\ub294 \uc791\uc5c5 \uac04\uc758 \ub370\uc774\ud130 \ud750\ub984\uc744 \ub098\ud0c0\ub0c5\ub2c8\ub2e4. \ub178\ub4dc\ub294 \ub2e4\uc74c\uc744 \ud3ec\ud568\ud558\uc5ec \uc5ec\ub7ec \uc720\ud615\uc73c\ub85c \ubd84\ub958\ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n

      \n
    1. \n

      \ud14c\uc774\ube14 \uc2a4\uce94:<\/strong> \uc774 \ub178\ub4dc\ub294 DBMS\uac00 \ud14c\uc774\ube14\uc758 \ubaa8\ub4e0 \ud589\uc744 \uc77d\uc5b4 \ud544\uc694\ud55c \ub370\uc774\ud130\ub97c \ucc3e\ub294 \uc804\uccb4 \ud14c\uc774\ube14 \uc2a4\uce94\uc744 \ub098\ud0c0\ub0c5\ub2c8\ub2e4.<\/p>\n<\/li>\n

    2. \n

      \uc778\ub371\uc2a4 \uc2a4\uce94\/\ud0d0\uc0c9:<\/strong> \uc774\ub7ec\ud55c \ub178\ub4dc\ub294 \uc778\ub371\uc2a4\ub97c \uc0ac\uc6a9\ud558\uc5ec \ub370\uc774\ud130\uc5d0 \uc561\uc138\uc2a4\ud558\ub294 \uac83\uc5d0 \ud574\ub2f9\ud569\ub2c8\ub2e4. \uc778\ub371\uc2a4 \uc2a4\uce94\uc5d0\ub294 \uc778\ub371\uc2a4 \ud56d\ubaa9\uc744 \uc77d\uc740 \ub2e4\uc74c \ud14c\uc774\ube14\uc5d0\uc11c \ud574\ub2f9 \ud589\uc744 \uac00\uc838\uc624\ub294 \uc791\uc5c5\uc774 \ud3ec\ud568\ub418\uba70, \uc778\ub371\uc2a4 \uac80\uc0c9\uc5d0\uc11c\ub294 \uc778\ub371\uc2a4\ub97c \uc0ac\uc6a9\ud558\uc5ec \ud589\uc744 \uc9c1\uc811 \ucc3e\uc2b5\ub2c8\ub2e4.<\/p>\n<\/li>\n

    3. \n

      \ud544\ud130:<\/strong> \ud544\ud130 \ub178\ub4dc\ub294 \uc9c0\uc815\ub41c \uc870\uac74\uc5d0 \ub530\ub77c \ud544\ud130 \ud589\uc5d0 \uc870\uac74\uc790\ub97c \uc801\uc6a9\ud569\ub2c8\ub2e4.<\/p>\n<\/li>\n

    4. \n

      \uc885\ub958:<\/strong> \uc815\ub82c \ub178\ub4dc\ub294 \uc9c0\uc815\ub41c \uc5f4\uc744 \uae30\uc900\uc73c\ub85c \ub370\uc774\ud130 \uc815\ub82c\uc744 \ub2f4\ub2f9\ud569\ub2c8\ub2e4.<\/p>\n<\/li>\n

    5. \n

      \uac00\uc785\ud558\ub2e4:<\/strong> \uc870\uc778 \ub178\ub4dc\ub294 \uc870\uc778 \uc870\uac74\uc5d0 \ub530\ub77c \uc5ec\ub7ec \ud14c\uc774\ube14\uc758 \ub370\uc774\ud130 \uacb0\ud569\uc744 \ucc98\ub9ac\ud569\ub2c8\ub2e4.<\/p>\n<\/li>\n<\/ol>\n

      \ub370\uc774\ud130\ubca0\uc774\uc2a4 \ucd5c\uc801\ud654 \ud504\ub85c\uadf8\ub7a8\uc740 \ub2e4\uc591\ud55c \uc2e4\ud589 \uacc4\ud68d\uc744 \ud3c9\uac00\ud558\uace0 \uac01 \uacc4\ud68d\uc5d0 \ube44\uc6a9\uc744 \ud560\ub2f9\ud569\ub2c8\ub2e4. \ube44\uc6a9\uc774 \uac00\uc7a5 \ub0ae\uc740 \uacc4\ud68d\uc774 \ucd5c\uc801\uc758 \uacc4\ud68d\uc73c\ub85c \uc120\ud0dd\ub418\uc5b4 \ucffc\ub9ac\ub97c \uc774\ud589\ud558\uae30 \uc704\ud574 \uc2e4\ud589\ub429\ub2c8\ub2e4.<\/p>\n

      Execution Plan(SQL)\uc758 \uc8fc\uc694 \uae30\ub2a5 \ubd84\uc11d<\/h2>\n

      SQL \uc2e4\ud589 \uacc4\ud68d\uc758 \uc8fc\uc694 \uae30\ub2a5\uc740 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.<\/p>\n

        \n
      1. \n

        \ucd5c\uc801\ud654:<\/strong> \uc2e4\ud589 \uacc4\ud68d\uc740 \ucffc\ub9ac\ub97c \uc2e4\ud589\ud558\ub294 \uac00\uc7a5 \ud6a8\uc728\uc801\uc778 \ubc29\ubc95\uc744 \uc2dd\ubcc4\ud558\uae30 \uc704\ud574 \uc5ec\ub7ec \uc804\ub7b5\uc744 \ud0d0\uc0c9\ud558\ub294 \ucffc\ub9ac \ucd5c\uc801\ud654 \ud504\ub85c\uadf8\ub7a8\uc744 \ud65c\uc6a9\ud569\ub2c8\ub2e4. \uc0ac\uc6a9 \uac00\ub2a5\ud55c \uc778\ub371\uc2a4, \ud1b5\uacc4 \ubc0f \ud14c\uc774\ube14 \ud06c\uae30\uc640 \uac19\uc740 \uc694\uc18c\ub97c \uace0\ub824\ud558\uc5ec \uac01 \uacc4\ud68d\uc758 \ube44\uc6a9\uc744 \ucd94\uc815\ud569\ub2c8\ub2e4.<\/p>\n<\/li>\n

      2. \n

        \uc720\uc5f0\uc131:<\/strong> \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uc2dc\uc2a4\ud15c\uc5d0 \ub530\ub77c \uc2e4\ud589 \uacc4\ud68d\uc740 \uac1c\ubc1c\uc790\uc5d0 \uc758\ud574 \uc601\ud5a5\uc744 \ubc1b\uac70\ub098 \uc2dc\ud589\ub420 \uc218\ub3c4 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub294 SQL \ucffc\ub9ac\uc5d0 \ud3ec\ud568\ub41c \ud78c\ud2b8\ub098 \uc9c0\uc2dc\uc5b4\ub97c \uc0ac\uc6a9\ud558\uc5ec \uc218\ud589\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<\/li>\n

      3. \n

        \ub3d9\uc801 \ucd5c\uc801\ud654:<\/strong> \uc77c\ubd80 \ucd5c\uc2e0 DBMS\ub294 \uc2e4\uc81c \ub370\uc774\ud130 \ubc30\ud3ec \ubc0f \ub9ac\uc18c\uc2a4 \uac00\uc6a9\uc131\uc744 \uae30\ubc18\uc73c\ub85c \ucffc\ub9ac \uc2e4\ud589 \uc911\uc5d0 \uc2e4\ud589 \uacc4\ud68d\uc774 \ubcc0\uacbd\ub420 \uc218 \uc788\ub294 \ub3d9\uc801 \ucd5c\uc801\ud654\ub97c \uc9c0\uc6d0\ud569\ub2c8\ub2e4.<\/p>\n<\/li>\n

      4. \n

        \ud1b5\uacc4 \uae30\ubc18 \uacb0\uc815:<\/strong> \ucffc\ub9ac \ucd5c\uc801\ud654 \ud504\ub85c\uadf8\ub7a8\uc740 \ub370\uc774\ud130\ubca0\uc774\uc2a4\uc758 \ud14c\uc774\ube14 \ubc0f \uc778\ub371\uc2a4\uc5d0 \ub300\ud55c \ud1b5\uacc4\uc5d0 \ud06c\uac8c \uc758\uc874\ud558\uc5ec \uac00\uc7a5 \ud6a8\uc728\uc801\uc778 \uc2e4\ud589 \uacc4\ud68d\uc5d0 \ub300\ud55c \uc815\ubcf4\uc5d0 \uae30\ubc18\ud55c \uacb0\uc815\uc744 \ub0b4\ub9bd\ub2c8\ub2e4.<\/p>\n<\/li>\n<\/ol>\n

        \uc2e4\ud589 \uacc4\ud68d \uc720\ud615(SQL)<\/h2>\n

        \ucffc\ub9ac \ucd5c\uc801\ud654 \ud504\ub85c\uadf8\ub7a8\uc740 \ucffc\ub9ac \ubcf5\uc7a1\uc131, \ub370\uc774\ud130 \ubc30\ud3ec \ubc0f \uc0ac\uc6a9 \uac00\ub2a5\ud55c \ub9ac\uc18c\uc2a4\ub97c \uae30\ubc18\uc73c\ub85c \uace0\ub824\ud560 \uc218 \uc788\ub294 \uc5ec\ub7ec \uc720\ud615\uc758 \uc2e4\ud589 \uacc4\ud68d\uc774 \uc788\uc2b5\ub2c8\ub2e4. \uac00\uc7a5 \uc77c\ubc18\uc801\uc778 \uc720\ud615\uc740 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.<\/p>\n

          \n
        1. \n

          \ud14c\uc774\ube14 \uc2a4\uce94 \uacc4\ud68d:<\/strong> \uc774 \uacc4\ud68d\uc5d0\ub294 \uc804\uccb4 \ud14c\uc774\ube14\uc744 \uc2a4\uce94\ud558\uc5ec \ud544\uc694\ud55c \ub370\uc774\ud130\ub97c \uac80\uc0c9\ud558\ub294 \uc791\uc5c5\uc774 \ud3ec\ud568\ub429\ub2c8\ub2e4. \uc791\uc740 \ud14c\uc774\ube14\uc774\ub098 \ud14c\uc774\ube14\uc758 \uc0c1\ub2f9 \ubd80\ubd84\uc5d0 \uc561\uc138\uc2a4\ud574\uc57c \ud558\ub294 \uacbd\uc6b0\uc5d0 \uc801\ud569\ud569\ub2c8\ub2e4.<\/p>\n<\/li>\n

        2. \n

          \uc778\ub371\uc2a4 \uc2a4\uce94 \uacc4\ud68d:<\/strong> \uc774 \uacc4\ud68d\uc5d0\uc11c \ucffc\ub9ac \ucd5c\uc801\ud654 \ud504\ub85c\uadf8\ub7a8\uc740 \uc778\ub371\uc2a4\ub97c \ud65c\uc6a9\ud558\uc5ec \uc6d0\ud558\ub294 \ud589\uc744 \ud6a8\uc728\uc801\uc73c\ub85c \ucc3e\uc2b5\ub2c8\ub2e4. \uc774\ub294 \uc778\ub371\uc2a4\uc758 \uc120\ud0dd\uc131\uc774 \ub9e4\uc6b0 \ub192\uace0 \ud589\uc758 \uc791\uc740 \ud558\uc704 \uc9d1\ud569\uc5d0\ub9cc \uc561\uc138\uc2a4\ud558\uba74 \ub418\ub294 \uacbd\uc6b0\uc5d0 \uc798 \uc791\ub3d9\ud569\ub2c8\ub2e4.<\/p>\n<\/li>\n

        3. \n

          \uc911\ucca9 \ub8e8\ud504 \uc870\uc778 \uacc4\ud68d:<\/strong> \uc774 \uacc4\ud68d\uc5d0\ub294 \ud55c \ud14c\uc774\ube14\uc744 \ubc18\ubcf5\ud558\uace0 \uc870\uc778 \uc870\uac74\uc5d0 \ub530\ub77c \uc77c\uce58\ud558\ub294 \ud589\uc744 \ucc3e\uae30 \uc704\ud574 \ub2e4\ub978 \ud14c\uc774\ube14\uc744 \uac80\uc0c9\ud558\ub294 \uc791\uc5c5\uc774 \ud3ec\ud568\ub429\ub2c8\ub2e4. \ud14c\uc774\ube14 \uc911 \ud558\ub098\uac00 \uc791\uace0 \uc870\uc778 \uc5f4\uc5d0 \uc778\ub371\uc2a4\uac00 \uc788\ub294 \uacbd\uc6b0 \ud6a8\uc728\uc801\uc785\ub2c8\ub2e4.<\/p>\n<\/li>\n

        4. \n

          \ud574\uc2dc \uc870\uc778 \uacc4\ud68d:<\/strong> \ud574\uc2dc \uc870\uc778\uc740 \ub354 \ud070 \ud14c\uc774\ube14\uc5d0 \uc0ac\uc6a9\ub418\uba70 \uc785\ub825 \ud14c\uc774\ube14 \uc911 \ud558\ub098\uc5d0 \ub300\ud55c \ud574\uc2dc \ud14c\uc774\ube14\uc744 \uc791\uc131\ud55c \ub2e4\uc74c \ub2e4\ub978 \ud14c\uc774\ube14\ub85c \uac80\uc0c9\ud558\ub294 \uc791\uc5c5\uc774 \ud3ec\ud568\ub429\ub2c8\ub2e4. \ub300\uaddc\ubaa8 \uc870\uc778\uc5d0 \ud6a8\uc728\uc801\uc785\ub2c8\ub2e4.<\/p>\n<\/li>\n

        5. \n

          \ubcd1\ud569 \uc870\uc778 \uacc4\ud68d:<\/strong> \ubcd1\ud569 \uc870\uc778\uc740 \ub450 \uc785\ub825 \ud14c\uc774\ube14\uc774 \ubaa8\ub450 \uc870\uc778 \uc5f4\uc5d0 \uc815\ub82c\ub418\uc5b4 \uc788\uc744 \ub54c \uc798 \uc791\ub3d9\ud569\ub2c8\ub2e4. \uc815\ub82c\ub41c \ub370\uc774\ud130\ub97c \ud6a8\uc728\uc801\uc73c\ub85c \ubcd1\ud569\ud558\uc5ec \uc870\uc778\uc744 \uc218\ud589\ud569\ub2c8\ub2e4.<\/p>\n<\/li>\n

        6. \n

          \uc815\ub82c \uacc4\ud68d:<\/strong> \uc774 \uacc4\ud68d\uc740 \uc9c0\uc815\ub41c \uc5f4\uc744 \uae30\uc900\uc73c\ub85c \ub370\uc774\ud130\ub97c \uc815\ub82c\ud569\ub2c8\ub2e4. ORDER BY \ucffc\ub9ac\uc5d0 \uc0ac\uc6a9\ud558\uac70\ub098 \ud2b9\uc815 \uc870\uc778\uc744 \ucd5c\uc801\ud654\ud558\ub294 \ub370 \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<\/li>\n<\/ol>\n

          \uc120\ud0dd\ub418\ub294 \uc2e4\ud589 \uacc4\ud68d \uc720\ud615\uc740 \ucffc\ub9ac \uad6c\uc870, \uc0ac\uc6a9 \uac00\ub2a5\ud55c \uc778\ub371\uc2a4, \uad00\ub828 \ud14c\uc774\ube14 \ud06c\uae30 \ub4f1 \ub2e4\uc591\ud55c \uc694\uc18c\uc5d0 \ub530\ub77c \ub2ec\ub77c\uc9d1\ub2c8\ub2e4.<\/p>\n

          Execution Plan(SQL)\uc758 \uc0ac\uc6a9\ubc29\ubc95\uacfc \uc0ac\uc6a9\uc5d0 \ub530\ub978 \ubb38\uc81c\uc810 \ubc0f \ud574\uacb0\ubc29\uc548<\/h2>\n

          \uc2e4\ud589 \uacc4\ud68d(SQL) \uc0ac\uc6a9 \ubc29\ubc95<\/h3>\n
            \n
          1. \n

            \ucffc\ub9ac \ucd5c\uc801\ud654:<\/strong> \uc2e4\ud589 \uacc4\ud68d\uc758 \uc8fc\uc694 \ubaa9\uc801\uc740 \ucffc\ub9ac \uc131\ub2a5\uc744 \ucd5c\uc801\ud654\ud558\ub294 \uac83\uc785\ub2c8\ub2e4. \uc2e4\ud589 \uacc4\ud68d\uc744 \uc774\ud574\ud568\uc73c\ub85c\uc368 \uac1c\ubc1c\uc790\uc640 \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uad00\ub9ac\uc790\ub294 \ube44\ud6a8\uc728\uc801\uc778 \ucffc\ub9ac\ub97c \uc2dd\ubcc4\ud558\uace0 \uc7ac\uad6c\uc131\ud558\uc5ec \uc2e4\ud589 \uc2dc\uac04\uc744 \ud5a5\uc0c1\uc2dc\ud0ac \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<\/li>\n

          2. \n

            \uc131\ub2a5 \ubb38\uc81c \ud574\uacb0:<\/strong> \ucffc\ub9ac\uac00 \uc608\uc0c1\ub300\ub85c \uc218\ud589\ub418\uc9c0 \uc54a\ub294 \uacbd\uc6b0 \uc2e4\ud589 \uacc4\ud68d\uc744 \uc870\uc0ac\ud558\uba74 \uc7a0\uc7ac\uc801\uc778 \ubcd1\ubaa9 \ud604\uc0c1\uc774 \ub4dc\ub7ec\ub0a0 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ub204\ub77d\ub41c \uc778\ub371\uc2a4, \ubd80\uc801\uc808\ud55c \uc870\uc778 \uc804\ub7b5 \ub610\ub294 \uacfc\ub3c4\ud55c \uc815\ub82c\uacfc \uac19\uc740 \ubb38\uc81c\ub97c \uc815\ud655\ud788 \ucc3e\uc544\ub0bc \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<\/li>\n

          3. \n

            \uc778\ub371\uc2a4 \ub514\uc790\uc778:<\/strong> \uc2e4\ud589 \uacc4\ud68d\uc744 \ubd84\uc11d\ud558\uba74 \ucffc\ub9ac \uc2e4\ud589\uc744 \ub354 \uc798 \uc9c0\uc6d0\ud558\uae30 \uc704\ud574 \uc778\ub371\uc2a4\ub97c \ub9cc\ub4e4\uac70\ub098 \uc218\uc815\ud558\ub294 \uac83\uc5d0 \ub300\ud574 \ud604\uba85\ud55c \uacb0\uc815\uc744 \ub0b4\ub9ac\ub294 \ub370 \ub3c4\uc6c0\uc774 \ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<\/li>\n<\/ol>\n

            Execution Plan(SQL) \uc0ac\uc6a9\uacfc \uad00\ub828\ub41c \ubb38\uc81c\uc810 \ubc0f \ud574\uacb0\ubc29\uc548<\/h3>\n
              \n
            1. \n

              \ub204\ub77d\ub418\uac70\ub098 \uc624\ub798\ub41c \ud1b5\uacc4:<\/strong> \uc624\ub798\ub418\uc5c8\uac70\ub098 \ub204\ub77d\ub41c \ud1b5\uacc4\ub294 \ucffc\ub9ac \ucd5c\uc801\ud654 \ud504\ub85c\uadf8\ub7a8\uc744 \uc624\ud574\ud558\uc5ec \ucd5c\uc801\uc774 \uc544\ub2cc \uc2e4\ud589 \uacc4\ud68d\uc73c\ub85c \uc774\uc5b4\uc9c8 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc815\uae30\uc801\uc73c\ub85c \ud1b5\uacc4\ub97c \uc5c5\ub370\uc774\ud2b8\ud558\uba74 \uc815\ud655\ud55c \uce74\ub514\ub110\ub9ac\ud2f0 \ucd94\uc815\uc744 \uc720\uc9c0\ud558\uace0 \ucffc\ub9ac \uc131\ub2a5\uc744 \ud5a5\uc0c1\uc2dc\ud0a4\ub294 \ub370 \ub3c4\uc6c0\uc774 \ub429\ub2c8\ub2e4.<\/p>\n<\/li>\n

            2. \n

              \ube44\ud6a8\uc728\uc801\uc778 \uc870\uc778 \uc804\ub7b5:<\/strong> \uc5b4\ub5a4 \uacbd\uc6b0\uc5d0\ub294 \ucffc\ub9ac \ucd5c\uc801\ud654 \ud504\ub85c\uadf8\ub7a8\uc774 \ubd80\uc801\uc808\ud55c \uc870\uc778 \uc804\ub7b5\uc744 \uc120\ud0dd\ud558\uc5ec \ucffc\ub9ac \uc18d\ub3c4\uac00 \ub290\ub824\uc9c8 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ucffc\ub9ac \ud78c\ud2b8\ub97c \uc0ac\uc6a9\ud558\uac70\ub098 \ucffc\ub9ac\ub97c \uc7ac\uad6c\uc131\ud558\uba74 \ucd5c\uc801\ud654 \ud504\ub85c\uadf8\ub7a8\uc774 \ub354 \ub098\uc740 \uacc4\ud68d\uc744 \uc138\uc6b8 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<\/li>\n

            3. \n

              \uc9c0\uc218 \uc120\ud0dd:<\/strong> \ucffc\ub9ac \ucd5c\uc801\ud654 \ud504\ub85c\uadf8\ub7a8\uc774 \ud56d\uc0c1 \ucffc\ub9ac\uc5d0 \uac00\uc7a5 \uc801\ud569\ud55c \uc778\ub371\uc2a4\ub97c \uc120\ud0dd\ud558\ub294 \uac83\uc740 \uc544\ub2d9\ub2c8\ub2e4. \uc774\ub7ec\ud55c \uc0c1\ud669\uc5d0\uc11c\ub294 \uc778\ub371\uc2a4\ub97c \uc218\ub3d9\uc73c\ub85c \uc9c0\uc815\ud558\uac70\ub098 \uc778\ub371\uc2a4 \ud78c\ud2b8\ub97c \uc0ac\uc6a9\ud558\ub294 \uac83\uc774 \ub3c4\uc6c0\uc774 \ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<\/li>\n

            4. \n

              \ub9e4\uac1c\ubcc0\uc218 \uc2a4\ub2c8\ud551:<\/strong> \ucffc\ub9ac \ub9e4\uac1c\ubcc0\uc218\uac00 \ud06c\uac8c \ub2ec\ub77c\uc9c0\ub294 \uacbd\uc6b0 \ud55c \ub9e4\uac1c\ubcc0\uc218 \uc138\ud2b8\uc5d0 \ub300\ud574 \uc0dd\uc131\ub41c \uc2e4\ud589 \uacc4\ud68d\uc774 \ub2e4\ub978 \ub9e4\uac1c\ubcc0\uc218 \uc138\ud2b8\uc5d0\ub294 \ucd5c\uc801\uc774 \uc544\ub2d0 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ub9e4\uac1c\ubcc0\uc218 \uc2a4\ub2c8\ud551\uc774\ub77c\uace0 \uc54c\ub824\uc9c4 \uc774 \ubb38\uc81c\ub294 \ucffc\ub9ac \ub9e4\uac1c\ubcc0\uc218\ud654 \ub610\ub294 \uacc4\ud68d \uce90\uc2f1\uacfc \uac19\uc740 \uae30\uc220\uc744 \uc0ac\uc6a9\ud558\uc5ec \ud574\uacb0\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<\/li>\n<\/ol>\n

              \uc8fc\uc694 \ud2b9\uc9d5 \ubc0f \uae30\ud0c0 \uc720\uc0ac\ud55c \uc6a9\uc5b4\uc640\uc758 \ube44\uad50\ub97c \ud45c\uc640 \ubaa9\ub85d \ud615\ud0dc\ub85c \uc81c\uacf5<\/h2>\n\n\n\n\n\n\n\n\n\n\n
              \ud2b9\uc9d5<\/th>\n\uc2e4\ud589 \uacc4\ud68d(SQL)<\/th>\n\ucffc\ub9ac \uacc4\ud68d<\/th>\n\uc2e4\ud589 \uacc4\ud68d(\ud504\ub85c\uadf8\ub798\ubc0d)<\/th>\n<\/tr>\n<\/thead>\n
              \uc720\ud615<\/td>\n\ub370\uc774\ud130\ubca0\uc774\uc2a4 \ucffc\ub9ac \uc2e4\ud589<\/td>\n\ub370\uc774\ud130\ubca0\uc774\uc2a4 \ucffc\ub9ac \uc2e4\ud589<\/td>\n\ud504\ub85c\uadf8\ub7a8 \uc2e4\ud589<\/td>\n<\/tr>\n
              \ubaa9\uc801<\/td>\n\ucffc\ub9ac \uc131\ub2a5 \ucd5c\uc801\ud654<\/td>\n\ucffc\ub9ac \uc131\ub2a5 \ucd5c\uc801\ud654<\/td>\n\ud504\ub85c\uadf8\ub7a8 \ud750\ub984 \uacb0\uc815<\/td>\n<\/tr>\n
              \uc138\ubd84\uc131<\/td>\n\ucffc\ub9ac \uc218\uc900<\/td>\n\ucffc\ub9ac \uc218\uc900<\/td>\n\uba85\ub839\ubb38 \ub610\ub294 \ucf54\ub4dc \ube14\ub85d \uc218\uc900<\/td>\n<\/tr>\n
              \uc6a9\ubc95<\/td>\n\ub370\uc774\ud130\ubca0\uc774\uc2a4 \uad00\ub9ac<\/td>\n\ub370\uc774\ud130\ubca0\uc774\uc2a4 \uad00\ub9ac<\/td>\n\uc18c\ud504\ud2b8\uc6e8\uc5b4 \uac1c\ubc1c<\/td>\n<\/tr>\n
              \ub300\ud45c<\/td>\n\ub098\ubb34\uc640 \uac19\uc740 \uad6c\uc870<\/td>\n\ub098\ubb34\uc640 \uac19\uc740 \uad6c\uc870<\/td>\n\uc81c\uc5b4 \ud750\ub984 \ub2e4\uc774\uc5b4\uadf8\ub7a8<\/td>\n<\/tr>\n
              \uc815\ubcf4 \uac00\uc6a9\uc131<\/td>\n\ub370\uc774\ud130\ubca0\uc774\uc2a4 \uc2dc\uc2a4\ud15c \uba54\ud0c0\ub370\uc774\ud130<\/td>\n\ub370\uc774\ud130\ubca0\uc774\uc2a4 \uc2dc\uc2a4\ud15c \uba54\ud0c0\ub370\uc774\ud130<\/td>\n\ub7f0\ud0c0\uc784 \uc911\uc5d0 \uc0ac\uc6a9 \uac00\ub2a5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

              Execution Plan(SQL)\uc5d0 \ub300\ud55c \ubbf8\ub798 \uc804\ub9dd\uacfc \uae30\uc220<\/h2>\n

              SQL \uc2e4\ud589 \uacc4\ud68d\uc758 \ubbf8\ub798\ub294 \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uae30\uc220, \ud2b9\ud788 \ucffc\ub9ac \ucd5c\uc801\ud654 \ubc0f \uae30\uacc4 \ud559\uc2b5\uc758 \ubc1c\uc804\uacfc \ubc00\uc811\ud558\uac8c \uc5f0\uad00\ub418\uc5b4 \uc788\uc2b5\ub2c8\ub2e4. \uc7a0\uc7ac\uc801\uc778 \ubbf8\ub798 \uac1c\ubc1c\uc5d0\ub294 \ub2e4\uc74c\uc774 \ud3ec\ud568\ub429\ub2c8\ub2e4.<\/p>\n

                \n
              1. \n

                \uba38\uc2e0\ub7ec\ub2dd \uae30\ubc18 \ucd5c\uc801\ud654:<\/strong> \ub370\uc774\ud130 \ubc0f \ucffc\ub9ac \ubcf5\uc7a1\uc131\uc774 \uacc4\uc18d \uc99d\uac00\ud568\uc5d0 \ub530\ub77c \uae30\uacc4 \ud559\uc2b5 \uae30\uc220\uc774 \ucffc\ub9ac \ucd5c\uc801\ud654\uc5d0 \ud1b5\ud569\ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub294 \ubcf4\ub2e4 \uc801\uc751\uc801\uc774\uace0 \uc0c1\ud669\uc744 \uc778\uc2dd\ud558\ub294 \uc2e4\ud589 \uacc4\ud68d\uc73c\ub85c \uc774\uc5b4\uc9c8 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<\/li>\n

              2. \n

                \uc790\ub3d9 \uc778\ub371\uc2f1:<\/strong> \ubbf8\ub798\uc758 \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uc2dc\uc2a4\ud15c\uc740 \uae30\uacc4 \ud559\uc2b5 \uc54c\uace0\ub9ac\uc998\uc744 \uc0ac\uc6a9\ud558\uc5ec \ucffc\ub9ac \uc131\ub2a5\uc744 \ud5a5\uc0c1\uc2dc\ud0a4\ub294 \uc778\ub371\uc2a4\ub97c \uc790\ub3d9\uc73c\ub85c \uc2dd\ubcc4\ud558\uace0 \uc0dd\uc131\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<\/li>\n

              3. \n

                \uc2e4\uc2dc\uac04 \ub3d9\uc801 \ucd5c\uc801\ud654:<\/strong> \ub3d9\uc801 \ucd5c\uc801\ud654\ub294 \ub354\uc6b1 \uc815\uad50\ud574\uc9c0\uba70 \ubcc0\ud654\ud558\ub294 \ub370\uc774\ud130 \ubc30\ud3ec \ubc0f \uc6cc\ud06c\ub85c\ub4dc\uc5d0 \ub530\ub77c \uc2e4\ud589 \uacc4\ud68d\uc744 \uc2e4\uc2dc\uac04\uc73c\ub85c \uc870\uc815\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<\/li>\n

              4. \n

                \uadf8\ub798\ud504 \uae30\ubc18 \uc2e4\ud589 \uacc4\ud68d:<\/strong> \uc2e4\ud589 \uacc4\ud68d\uc758 \uadf8\ub798\ud504 \ud45c\ud604\uc744 \ud0d0\uc0c9\ud558\uc5ec \uc6b4\uc601\uacfc \ucd5c\uc801\ud654 \uc804\ub7b5 \uac04\uc758 \ubcf4\ub2e4 \ubcf5\uc7a1\ud55c \uad00\uacc4\ub97c \ud5c8\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<\/li>\n<\/ol>\n

                \ud504\ub85d\uc2dc \uc11c\ubc84\ub97c \uc0ac\uc6a9\ud558\uac70\ub098 \uc2e4\ud589 \uacc4\ud68d(SQL)\uacfc \uc5f0\uacb0\ud558\ub294 \ubc29\ubc95<\/h2>\n

                \ud504\ub85d\uc2dc \uc11c\ubc84\ub294 \ud074\ub77c\uc774\uc5b8\ud2b8\uc640 \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uc11c\ubc84 \uac04\uc758 \uc911\uac1c\uc790 \uc5ed\ud560\uc744 \ud558\uc5ec SQL\uc5d0\uc11c \uc2e4\ud589 \uacc4\ud68d\uc744 \ucd5c\uc801\ud654\ud558\ub294 \uc5ed\ud560\uc744 \ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uadf8\ub4e4\uc740 \ub2e4\uc74c\uacfc \uac19\uc740 \ubc29\ubc95\uc73c\ub85c \ub3c4\uc6c0\uc744 \uc904 \uc218 \uc788\uc2b5\ub2c8\ub2e4:<\/p>\n

                  \n
                1. \n

                  \uce90\uc2f1:<\/strong> \ud504\ub85d\uc2dc \uc11c\ubc84\ub294 \uc790\uc8fc \uc2e4\ud589\ub418\ub294 \ucffc\ub9ac\uc640 \ud574\ub2f9 \uc2e4\ud589 \uacc4\ud68d\uc744 \uce90\uc2dc\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub294 \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uc11c\ubc84\uc758 \ub85c\ub4dc\ub97c \uc904\uc774\uace0 \ud6c4\uc18d \ub3d9\uc77c\ud55c \ucffc\ub9ac\uc5d0 \ub300\ud55c \uc751\ub2f5 \uc2dc\uac04\uc744 \ud5a5\uc0c1\uc2dc\ud0b5\ub2c8\ub2e4.<\/p>\n<\/li>\n

                2. \n

                  \ub85c\ub4dc \ubc38\ub7f0\uc2f1:<\/strong> \ubd84\uc0b0 \ub370\uc774\ud130\ubca0\uc774\uc2a4 \ud658\uacbd\uc5d0\uc11c \ud504\ub85d\uc2dc \uc11c\ubc84\ub294 \uc2e4\ud589 \uacc4\ud68d \ubd84\uc11d\uc744 \uae30\ubc18\uc73c\ub85c \uc5ec\ub7ec \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uc11c\ubc84\uc5d0 \ucffc\ub9ac \ub85c\ub4dc \uade0\ud615\uc744 \ub9de\ucd9c \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<\/li>\n

                3. \n

                  \uc555\ucd95 \ubc0f \ucd95\uc18c:<\/strong> \ud504\ub85d\uc2dc \uc11c\ubc84\ub294 SQL \ucffc\ub9ac\ub97c \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uc11c\ubc84\ub85c \ubcf4\ub0b4\uae30 \uc804\uc5d0 \uc555\ucd95\ud558\uace0 \ucd95\uc18c\ud558\uc5ec \ub124\ud2b8\uc6cc\ud06c \uc624\ubc84\ud5e4\ub4dc\ub97c \uc904\uc774\uace0 \ucffc\ub9ac \uc2e4\ud589 \uc2dc\uac04\uc744 \ud5a5\uc0c1\uc2dc\ud0ac \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<\/li>\n

                4. \n

                  \ucffc\ub9ac \ub77c\uc6b0\ud305:<\/strong> \ud504\ub85d\uc2dc \uc11c\ubc84\ub294 \uc2e4\ud589 \uacc4\ud68d \ubd84\uc11d\uc744 \uae30\ubc18\uc73c\ub85c \uac00\uc7a5 \uc801\ud569\ud55c \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uc11c\ubc84\ub85c \ucffc\ub9ac\ub97c \ub77c\uc6b0\ud305\ud558\uc5ec \ub354 \ub098\uc740 \ucffc\ub9ac \uc131\ub2a5\uc744 \ubcf4\uc7a5\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<\/li>\n<\/ol>\n

                  \uad00\ub828\ub41c \ub9c1\ud06c\ub4e4<\/h2>\n

                  \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uc2dc\uc2a4\ud15c\uc758 SQL(\uc2e4\ud589 \uacc4\ud68d) \ubc0f \ucffc\ub9ac \ucd5c\uc801\ud654\uc5d0 \ub300\ud55c \uc790\uc138\ud55c \ub0b4\uc6a9\uc740 \ub2e4\uc74c \ub9ac\uc18c\uc2a4\ub97c \ucc38\uc870\ud558\uc138\uc694.<\/p>\n

                    \n
                  1. \uc2e4\ud589 \uacc4\ud68d \uc774\ud574<\/a><\/li>\n
                  2. SQL Server \uc2e4\ud589 \uacc4\ud68d<\/a><\/li>\n
                  3. \ub370\uc774\ud130\ubca0\uc774\uc2a4 \ucd5c\uc801\ud654 \uae30\uc220<\/a><\/li>\n<\/ol>\n

                    \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uc131\ub2a5\uc744 \ucd5c\uc801\ud654\ud558\uace0 \uc804\ubc18\uc801\uc778 \uc0ac\uc6a9\uc790 \uacbd\ud5d8\uc744 \ud5a5\uc0c1\uc2dc\ud0a4\ub824\ub294 \uac1c\ubc1c\uc790\uc640 \uad00\ub9ac\uc790\uc5d0\uac8c\ub294 SQL\uc758 \ubcf5\uc7a1\ud55c \uc2e4\ud589 \uacc4\ud68d\uc744 \uc774\ud574\ud558\ub294 \uac83\uc774 \uc911\uc694\ud569\ub2c8\ub2e4. \uc2e4\ud589 \uacc4\ud68d\uc758 \ub0b4\ubd80 \uc791\uc5c5\uc744 \ud30c\uc545\ud568\uc73c\ub85c\uc368 \uc815\ubcf4\uc5d0 \uadfc\uac70\ud55c \uacb0\uc815\uc744 \ub0b4\ub9ac\uace0, \ucffc\ub9ac\ub97c \ubbf8\uc138 \uc870\uc815\ud558\uace0, \ud6a8\uc728\uc801\uc778 \ub370\uc774\ud130 \uac80\uc0c9\uc744 \ubcf4\uc7a5\ud560 \uc218 \uc788\uc73c\ubbc0\ub85c \uc774\ub294 \ud604\ub300 \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uad00\ub9ac \uc2dc\uc2a4\ud15c\uc758 \ud544\uc218 \uc694\uc18c\uc785\ub2c8\ub2e4.<\/p>","protected":false},"featured_media":0,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-477146","wiki","type-wiki","status-publish","hentry"],"acf":{"faq_title":"Frequently Asked Questions about Execution Plan (SQL) in Database Management Systems<\/mark>","faq_items":[{"question":"What is an Execution Plan in SQL?","answer":"

                    An execution plan in SQL is a detailed roadmap that the database management system (DBMS) follows to execute a specific SQL query efficiently. It outlines the steps and operations the DBMS will use to retrieve, join, filter, and process data to fulfill the query's requirements.<\/p>"},{"question":"How does an Execution Plan work?","answer":"

                    When a query is submitted to the DBMS, it undergoes a multi-step process before the actual data retrieval and processing can take place. The DBMS first parses the SQL query to ensure its correctness, then the query optimizer comes into play, exploring different execution plans and choosing the most efficient one. The selected plan is then generated and executed, with the DBMS employing various techniques like index scans, joins, and sorting to fetch and process data.<\/p>"},{"question":"What are the key features of an Execution Plan in SQL?","answer":"

                    The key features of an execution plan in SQL include optimization, flexibility, dynamic optimization, and statistics-based decision-making. The optimizer evaluates various execution plans and assigns a cost to each, choosing the plan with the lowest cost for execution.<\/p>"},{"question":"What types of Execution Plans exist?","answer":"

                    Several types of execution plans can be considered by the query optimizer, such as table scan plan, index scan plan, nested loop join plan, hash join plan, merge join plan, and sort plan. The choice of plan depends on factors like query complexity, data distribution, and available resources.<\/p>"},{"question":"How can I use Execution Plans in SQL?","answer":"

                    You can use execution plans in SQL for query optimization, performance troubleshooting, and index design. By understanding the execution plan, you can identify inefficient queries, optimize their structure, and improve overall database performance.<\/p>"},{"question":"What problems can be encountered with Execution Plans, and how can they be solved?","answer":"

                    Common problems with execution plans include missing or stale statistics, inefficient join strategies, and improper index selection. To address these issues, regularly update statistics, use query hints, and consider manual index specification.<\/p>"},{"question":"What are the future perspectives related to Execution Plans in SQL?","answer":"

                    The future of execution plans in SQL is expected to involve machine learning-based optimization, automated indexing, real-time dynamic optimization, and potentially, graph-based representations of execution plans.<\/p>"},{"question":"How can proxy servers be associated with Execution Plans in SQL?","answer":"

                    Proxy servers can optimize the execution plan in SQL by caching queries, load balancing, compressing and minifying queries, and routing queries to the most appropriate database server based on execution plan analysis. This enhances overall query performance and database management efficiency.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/kr\/wp-json\/wp\/v2\/wiki\/477146","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oneproxy.pro\/kr\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/oneproxy.pro\/kr\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/oneproxy.pro\/kr\/wp-json\/wp\/v2\/wiki\/477146\/revisions"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/kr\/wp-json\/wp\/v2\/media?parent=477146"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}