{"id":1811,"date":"2014-12-16T17:51:04","date_gmt":"2014-12-16T17:51:03","guid":{"rendered":"https:\/\/www.couchbase.com\/blog\/?p=1811"},"modified":"2025-06-13T21:11:09","modified_gmt":"2025-06-14T04:11:09","slug":"understanding-grouplevel-view-queries-compound-keys","status":"publish","type":"post","link":"https:\/\/www.couchbase.com\/blog\/ko\/understanding-grouplevel-view-queries-compound-keys\/","title":{"rendered":"\ubcf5\ud569 \ud0a4\uac00 \uc788\ub294 \ubdf0 \ucffc\ub9ac\uc5d0\uc11c group_level \uc774\ud574"},"content":{"rendered":"

\ubdf0 \ucffc\ub9ac\ub294 \ubdf0\uc758 \ud575\uc2ec\uc785\ub2c8\ub2e4. \ud6cc\ub96d\ud55c \ubb38\uc11c\uac00 \uc788\uc73c\uba70 \uc5ec\uae30\uc5d0\uc11c \ud655\uc778\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4:\u00a0<\/span>https:\/\/www.couchbase.com\/docs\/couchbase-manual-2.0\/couchbase-views.html<\/a><\/p>\n

\ubcf5\ud569 \ud0a4<\/h3>\n

\uadf8\ub8f9 \ub808\ubca8\uc774 \uc5b4\ub5bb\uac8c \uc791\ub3d9\ud558\ub294\uc9c0 \uc124\uba85\ud558\uae30 \uc704\ud574 \ucd5c\uadfc \ub85c\uadf8\uc778 \ud0c0\uc784\uc2a4\ud0ec\ud504\ub97c \uae30\uc900\uc73c\ub85c \uc0ac\uc6a9\uc790\ub97c \uc815\ub82c\ud558\ub294 \ub9f5 \ud568\uc218\ub97c \uc0ac\uc6a9\ud558\uc5ec \ud574\ub2f9 \ud0c0\uc784\uc2a4\ud0ec\ud504\ub97c '\ubcf5\ud569 \ud0a4'(\ub610\ub294 \ubc30\uc5f4 \ud0a4)\ub77c\uace0 \ud558\ub294 \ubc30\uc5f4[yyyy,MM,dd,hh,mm,ss]\ub85c \ubcc0\ud658\ud558\uc5ec \ub9f5 \ud568\uc218\uc758 \ucd9c\ub825\uc73c\ub85c \uc0ac\uc6a9\ud574 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4:<\/p>\n

\uc9c0\ub3c4 \uae30\ub2a5<\/h5>\n
\n
function(doc, meta) {
\nif (doc.login_timestamp) {
\nemit(dateToArray(doc.login_timestamp), doc.username);
\n}
\n}<\/div>\n<\/div>\n
\uae30\ub2a5 \ucd95\uc18c<\/h5>\n
\n
_count<\/div>\n<\/div>\n
\uacb0\uacfc \ud589(reduce=false \uc0ac\uc6a9)<\/h5>\n\n\n\n\n\n\n\n\n
\n
\n
[2011,10,10,10,10,09]<\/div>\n<\/div>\n<\/td>\n
\n
\n
\"scalabl3\"<\/div>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
[2012,12,24,17,03,59]<\/div>\n<\/div>\n<\/td>\n
\n
\n
\"scalabl3\"<\/div>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
[2013,01,01,08,22,23]<\/div>\n<\/div>\n<\/td>\n
\n
\n
\"scalabl3\"<\/div>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
[2013,01,25,10,38,01]<\/div>\n<\/div>\n<\/td>\n
\n
\n
\"tgrall\"<\/div>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
[2013,01,25,11,02,32]<\/div>\n<\/div>\n<\/td>\n
\n
\n
\"jzablocki\"<\/div>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
[2013,02,01,11,02,32]<\/div>\n<\/div>\n<\/td>\n
\n
\n
\"scalabl3\"<\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\uac00\uc7a5 \uba3c\uc800 \uc8fc\ubaa9\ud574\uc57c \ud560 \uc911\uc694\ud55c \uc810\uc740 \uc790\ubc14\uc2a4\ud06c\ub9bd\ud2b8 \ub9f5 \ud568\uc218\uc758 \uc815\uc218\ucc98\ub7fc \ubcf4\uc774\ub294 \ubc30\uc5f4 \ucd9c\ub825\uc774\uc9c0\ub9cc \uadf8\ub807\uc9c0 \uc54a\uc73c\uba70, \uac01 \uc778\ub371\uc2a4 \ud0a4\ub294 \ubb38\uc790\uc5f4\uc774\uace0 \ub300\uad04\ud638\uc640 \uc27c\ud45c\ub97c \ud3ec\ud568\ud558\uc5ec \ubb38\uc790\uc5f4\ucc98\ub7fc \ubb38\uc790\ubcc4\ub85c \uc815\ub82c\ub418\uc5b4 \uc788\uc73c\uba70, \ubaa8\ub4e0 \ud55c \uc790\ub9ac \uc22b\uc790\ub294 \uc55e\uc5d0 0\uc774 \ubd99\uc5b4 \uc788\uae30 \ub54c\ubb38\uc5d0 \uc21c\uc11c\uac00 \uc720\uc9c0\ub41c\ub2e4\ub294 \uc810\uc785\ub2c8\ub2e4. \uc774\uc640 \ube44\uc2b7\ud558\ubbc0\ub85c \ub530\uc634\ud45c \ubb38\uc790\ub97c \uadf8\ub300\ub85c \uc720\uc9c0\ud558\uaca0\uc2b5\ub2c8\ub2e4:<\/p>\n\n\n\n\n\n\n\n\n
\n
\n
[“2011″,”10″,”10″,”10″,”10″,”09”]<\/div>\n<\/div>\n<\/td>\n
\n
\n
\"scalabl3\"<\/div>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
[“2012″,”12″,”24″,”17″,”03″,”59”]<\/div>\n<\/div>\n<\/td>\n
\n
\n
\"scalabl3\"<\/div>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
[“2013″,”01″,”01″,”08″,”22″,”23”]<\/div>\n<\/div>\n<\/td>\n
\n
\n
\"scalabl3\"<\/div>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
[“2013″,”01″,”25″,”10″,”38″,”01”]<\/div>\n<\/div>\n<\/td>\n
\n
\n
\"tgrall\"<\/div>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
[“2013″,”01″,”25″,”11″,”02″,”32”]<\/div>\n<\/div>\n<\/td>\n
\n
\n
\"jzablocki\"<\/div>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
[“2013″,”02″,”01″,”11″,”02″,”32”]<\/div>\n<\/div>\n<\/td>\n
\n
\n
\"scalabl3\"<\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\ud0a4 \uc8fc\ubb38\uc5d0 \ub300\ud55c \uac04\ub2e8\ud55c \uc124\uba85 \uc608\uc2dc<\/h3>\n

\ub2e4\uc74c\uacfc \uac19\uc740 Map \ucd9c\ub825\uc774 \uc788\ub2e4\uba74, \uc2e4\uc81c\ub85c \uc778\ub371\uc2a4 \ud0a4\uac00 \ud56d\uc0c1 \ubb38\uc790\uc5f4\uc778 Int \ub9e4\uac1c\ubcc0\uc218\uc77c \ub54c\uc640 \ub2e4\ub974\uac8c \uc815\ub82c\ub418\uc5b4 \uc788\uc74c\uc744 \uc54c \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n\n\n
\n
\n
[2012,\"beer\",1]<\/div>\n<\/div>\n<\/td>\n
\n
\n
null<\/div>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
[2012,\"beer\",10]<\/div>\n<\/div>\n<\/td>\n
\n
\n
null<\/div>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
[2012,\"beer\",2]<\/div>\n<\/div>\n<\/td>\n
\n
\n
null<\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\ubb38\uc790\uc5f4 \ube44\uad50\ub85c \uc778\ud574 \uc778\ub371\uc2a4 \ud0a4\uc758 \ub450 \ubc88\uc9f8 '\uc694\uc18c'\ub294 \uc815\uc218\uac00 \uc544\ub2cc \uc138 \ubc88\uc9f8 \uc694\uc18c\ubcf4\ub2e4 \uc55e\uc5d0 \uc624\ub3c4\ub85d \uc815\ub82c\ub418\uc5b4 \uc788\uc74c\uc744 \uc54c \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc608\uc57d\ub41c \ud504\ub85c\uadf8\ub7a8\uc73c\ub85c \ub3cc\uc544\uac00\uc11c...<\/p>\n

\uadf8\ub8f9 \ub808\ubca8\ub85c \uacc4\uc18d...<\/h3>\n

\uc774\uc81c \uc704 \ubdf0\uc758 \ub85c\uadf8\uc778_\ud0c0\uc784\uc2a4\ud0ec\ud504 \ubaa9\ub85d\uc73c\ub85c \ub3cc\uc544\uac00\uc11c, \uc5f0\ub3c4\ubcc4\ub85c \ub85c\uadf8\uc778\ud55c \uc0ac\ub78c \uc218\ub97c \ud655\uc778\ud558\ub824\uba74 \ucffc\ub9ac \ub9e4\uac1c \ubcc0\uc218 \"group_level=1\"\uc744 \ucd94\uac00\ud558\uba74 \uccab \ubc88\uc9f8 \uc27c\ud45c\uc5d0\uc11c \ubb38\uc790\uc5f4\uc744 \ubd84\ud560\ud558\uace0 \uc67c\ucabd \uc694\uc18c\ub97c \ubb38\uc790\uc5f4 \uc77c\uce58\ub85c \uadf8\ub8f9\ud654\ud55c \ub2e4\uc74c \uadf8\ub8f9\uc5d0\uc11c \uc904\uc5ec\uc11c \uac1c\uc218\ub97c \uc0b0\ucd9c\ud569\ub2c8\ub2e4.<\/p>\n\n\n\n\n\n
\n
\n
[“2011”]<\/div>\n<\/div>\n<\/td>\n
\n
\n
1<\/div>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
[“2012”]<\/div>\n<\/div>\n<\/td>\n
\n
\n
1<\/div>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
[“2013”]<\/div>\n<\/div>\n<\/td>\n
\n
\n
4<\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\uc774\uc81c \ub354 \uc138\ubd84\ud654\ub41c \ubcf4\uae30(\uc5f0\ub3c4, \uc6d4)\ub97c \uc6d0\ud55c\ub2e4\uba74 \uadf8\ub8f9 \uc218\uc900, \uadf8\ub8f9 \uc218\uc900=2\uc5d0 1\uc744 \ub354\ud558\uace0 \ub450 \ubc88\uc9f8 \uc27c\ud45c\uc5d0\uc11c \ubd84\ud560\ud558\uc5ec \uc67c\ucabd \uc694\uc18c\ub97c \uac00\uc838\uc640 \uadf8\ub8f9\ud654\ud55c \ub2e4\uc74c \uc904\uc774\uae30\ub97c \uc218\ud589\ud569\ub2c8\ub2e4. \uc774\ub807\uac8c \ud558\uba74 \ub3d9\uc77c\ud55c \ub370\uc774\ud130\ub85c \ub2e4\uc74c\uacfc \uac19\uc740 \uacb0\uacfc\uac00 \ub098\ud0c0\ub0a9\ub2c8\ub2e4:<\/p>\n\n\n\n\n\n\n
\n
\n
[“2011″,”10”]<\/div>\n<\/div>\n<\/td>\n
\n
\n
1<\/div>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
[“2012″,”12”]<\/div>\n<\/div>\n<\/td>\n
\n
\n
1<\/div>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
[“2013″,”01”]<\/div>\n<\/div>\n<\/td>\n
\n
\n
3<\/div>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
[“2013″,”02”]<\/div>\n<\/div>\n<\/td>\n
\n
\n
1<\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\ub2e4\uc74c \uadf8\ub8f9_\ub808\ubca8\uc778 group_level=3\uc73c\ub85c \uc774\ub3d9\ud558\uba74 \ubcf5\ud569 \ud0a4\uc758 \uc138 \ubc88\uc9f8 \uc694\uc18c\uc778 (yyyy,MM,dd)\ub85c \uadf8\ub8f9\ud654\ub418\uba70, \uc774\ub294 \uc138 \ubc88\uc9f8 \uc27c\ud45c\uc5d0\uc11c \ubd84\ud560\ub418\uc5b4 \uc67c\ucabd \uc694\uc18c\ub97c \ud568\uaed8 \uadf8\ub8f9\ud654\ud558\uc5ec \ucd95\uc18c\ud569\ub2c8\ub2e4:<\/p>\n\n\n\n\n\n\n\n
\n
\n
[“2011″,”10″,”10”]<\/div>\n<\/div>\n<\/td>\n
\n
\n
1<\/div>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
[“2012″,”12″,”24”]<\/div>\n<\/div>\n<\/td>\n
\n
\n
1<\/div>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
[“2013″,”01″,”01”]<\/div>\n<\/div>\n<\/td>\n
\n
\n
1<\/div>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
[“2013″,”01″,”25”]<\/div>\n<\/div>\n<\/td>\n
\n
\n
2<\/div>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
[“2013″,”02″,”01”]<\/div>\n<\/div>\n<\/td>\n
\n
\n
1<\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\uc774 \uc791\uc740 \ub370\uc774\ud130 \uc9d1\ud569\uc5d0\uc11c group_level=4(\uc774 \uacbd\uc6b0 \uc2dc\uac04 \uae30\uc900)\ub85c \uc774\ub3d9\ud558\uba74 \uac01 \uc694\uc18c\ub294 \ubaa8\ub450 \uace0\uc720\ud558\uae30 \ub54c\ubb38\uc5d0 \uadf8\ub8f9\ud654 \ubc0f \ucd95\uc18c\ud560 \uc218 \uc788\ub294 \uc790\uccb4 \ud589 \uacb0\uacfc\uac00 \ub429\ub2c8\ub2e4(yyyy,MM,dd,hh). \ub354 \ud06c\uace0 \ub354 \uc790\uc8fc \uc5c5\ub370\uc774\ud2b8\ub418\ub294 \ub370\uc774\ud130 \uc9d1\ud569\uc5d0\uc11c\ub294 \ubd84 \ub2e8\uc704\ub85c \uadf8\ub8f9\ud654\ud558\uc5ec \ub354 \ub192\uc740 _count \uc218\uce58\ub97c \ubcfc \uc218 \uc788\uc2b5\ub2c8\ub2e4:<\/p>\n\n\n\n\n\n\n\n\n
\n
\n
[“2011″,”10″,”10″,”10”]<\/div>\n<\/div>\n<\/td>\n
\n
\n
1<\/div>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
[“2012″,”12″,”24″,”17”]<\/div>\n<\/div>\n<\/td>\n
\n
\n
1<\/div>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
[“2013″,”01″,”01″,”08”]<\/div>\n<\/div>\n<\/td>\n
\n
\n
1<\/div>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
[“2013″,”01″,”25″,”10”]<\/div>\n<\/div>\n<\/td>\n
\n
\n
1<\/div>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
[“2013″,”01″,”25″,”11”]<\/div>\n<\/div>\n<\/td>\n
\n
\n
1<\/div>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
[“2013″,”02″,”01″,”11”]<\/div>\n<\/div>\n<\/td>\n
\n
\n
1<\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\ubcf5\ud569 \ud0a4 \uc774\ud574<\/h3>\n

\ubcf4\uc2dc\ub2e4\uc2dc\ud53c \ubcf5\ud569 \ud0a4\ub294 \ub9e4\uc6b0 \uc720\uc6a9\ud558\uc9c0\ub9cc \uc5b4\ub290 \uc815\ub3c4 \uc774\ud574\uac00 \uc788\uc5b4\uc57c \uc62c\ubc14\ub974\uac8c \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ubb38\uc790\uc5f4 \ube44\uad50\ub77c\ub294 \uc810\uc744 \uae30\uc5b5\ud558\uba74 \uc608\uc0c1\ud55c \ub300\ub85c \uc815\ub82c\ub418\uc9c0 \uc54a\ub294 \ud0a4\ub97c \ub9cc\ub4e4\uc9c0 \uc54a\ub294 \ub370 \ub3c4\uc6c0\uc774 \ub429\ub2c8\ub2e4. \ub610\ud55c \uc815\uc218 '\uac12'\uc774 \uc544\ub2cc \ubb38\uc790\uc5f4 \ube44\uad50\uc774\ubbc0\ub85c \uc62c\ubc14\ub978 \uc21c\uc11c\ub97c \uc720\uc9c0\ud558\uae30 \uc704\ud574 \ud328\ub4dc \ubc88\ud638\uc5d0 0\uc744 \ub0a8\uaca8\ub450\ub294 \uac83\uc774 \uc88b\uc2b5\ub2c8\ub2e4:<\/p>\n

\n
\ud568\uc218 (\ubb38\uc11c, \uba54\ud0c0) {
\nif (doc.year && doc.type == \"beer\" && doc.int_value) {
\nvar val = doc.int_value.toString();
\nvar max =\"000000000\u2033;
\nvar pval = max.substring(0, max.length - val.length) + val;
\nemit([doc.year, doc.type, pval], null);
\n}
\n}<\/div>\n<\/div>\n
\uacb0\uacfc \ud589(reduce=false \uc0ac\uc6a9)<\/h5>\n\n\n\n\n\n
\n
\n
[2012,\u201dbeer\u201d,\u201d000000001\u2033]<\/div>\n<\/div>\n<\/td>\n
\n
\n
1<\/div>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
[2012,\u201dbeer\u201d,\u201d000000002\u2033]<\/div>\n<\/div>\n<\/td>\n
\n
\n
1<\/div>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
[2012,\u201dbeer\u201d,\u201d000000010\u2033]<\/div>\n<\/div>\n<\/td>\n
\n
\n
1<\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\ubb3c\ub860 \ubc30\uc5f4\uc5d0\ub294 \ub0a0\uc9dcToArray\ubfd0\ub9cc \uc544\ub2c8\ub77c \ubb34\uc5c7\uc774\ub4e0 \ub123\uc744 \uc218 \uc788\uc2b5\ub2c8\ub2e4! \uc774\ub294 \ud56d\ubaa9\uc744 \uadf8\ub8f9\ud654\ud558\uc5ec \uc904\uc77c \uc218 \uc788\ub294 \uc720\uc6a9\ud55c \uc804\ub7b5\uc785\ub2c8\ub2e4. \ub9c8\uc9c0\ub9c9\uc73c\ub85c \uae30\uc5b5\ud574\uc57c \ud560 \uac83\uc740 0\uc73c\ub85c \ud328\ub529\ud558\uba74 \ubb38\uc790\uc5f4\uc774\ubbc0\ub85c \uacb0\uacfc \uc778\ub371\uc2a4 \ud0a4\uc5d0 \ub300\ud574 \ubc94\uc704 \ucffc\ub9ac\ub97c \uc218\ud589\ud558\ub824\ub294 \uacbd\uc6b0, \uc608\ub97c \ub4e4\uc5b4 \ud2b9\uc815 \ubc94\uc704\ub97c \ucc3e\uace0 \uc788\ub2e4\uba74 \ud574\ub2f9 \ubc94\uc704\ub3c4 0\uc73c\ub85c \ud328\ub529\ud574\uc57c \ud55c\ub2e4\ub294 \uac83\uc785\ub2c8\ub2e4:<\/p>\n

\n
startkey=[2012,\u201dbeer\u201d,\u201d000000002\u2033]
\n&endkey=[2012,\u201dbeer\u201d,\u201d000000007\u2033]<\/div>\n<\/div>\n

\uc720\ub2c8\ucf54\ub4dc \ucf5c\ub808\uc774\uc158 \uc774\ud574<\/h3>\n

\ubb38\uc790\uc5f4 \ubb38\uc790 \uc21c\uc11c\uc5d0 \ub300\ud55c \uc790\uc138\ud55c \ub0b4\uc6a9\uc740 \ubdf0\uc758 \uc720\ub2c8\ucf54\ub4dc \uc815\ub82c\uc5d0 \ub300\ud55c \uac8c\uc2dc\ubb3c\uc744 \ucc38\uc870\ud558\uc138\uc694. \uc774 \uc21c\uc11c\ub294 \ubc14\uc774\ud2b8 \uc21c\uc11c\uac00 \uc544\ub2c8\uba70 \ubcf5\ud569 \ud0a4\uc5d0\ub3c4 \uc801\uc6a9\ub429\ub2c8\ub2e4: \ubdf0 \ucffc\ub9ac\uc5d0\uc11c \ubb38\uc790 \uc21c\uc11c \uc9c0\uc815 \uc774\ud574<\/a><\/p>\n

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Querying Views is what views are all about. 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