{"id":7021,"date":"2019-06-08T05:30:12","date_gmt":"2019-06-08T12:30:12","guid":{"rendered":"https:\/\/www.couchbase.com\/blog\/?p=7021"},"modified":"2025-06-13T23:42:51","modified_gmt":"2025-06-14T06:42:51","slug":"n1ql-query-basic-order-of-execution","status":"publish","type":"post","link":"https:\/\/www.couchbase.com\/blog\/ko\/n1ql-query-basic-order-of-execution\/","title":{"rendered":"N1QL(\ucffc\ub9ac) \uae30\ubcf8 \uc2e4\ud589 \uc21c\uc11c."},"content":{"rendered":"<blockquote><p>\ucffc\ub9ac \uad6c\ubb38\uc774 \uc81c\ud55c\ub418\uc5b4 \uc788\uc2b5\ub2c8\ub2e4. \ucffc\ub9ac\ub294 \ubb34\uc81c\ud55c\uc785\ub2c8\ub2e4.<\/p><\/blockquote>\n<p><a href=\"https:\/\/docs.couchbase.com\/server\/5.5\/performance\/index_pushdowns.html\">\uc220\uc5b4 \ud478\uc2dc\ub2e4\uc6b4<\/a>, <a href=\"https:\/\/www.couchbase.com\/blog\/ko\/understanding-index-grouping-aggregation-couchbase-n1ql-query\/\">\ud478\uc2dc \ub2e4\uc6b4\uc73c\ub85c \uadf8\ub8f9\ud654<\/a>, <a href=\"https:\/\/www.couchbase.com\/blog\/ko\/optimizing-database-pagination-using-couchbase-n1ql\/\">\ud398\uc774\uc9c0 \ub9e4\uae40 \uc624\ud504\uc14b<\/a>, <a href=\"https:\/\/www.couchbase.com\/blog\/ko\/offset-keyset-pagination-n1ql-query-couchbase\/\">\ud0a4\uc138\ud2b8 \ud398\uc774\uc9c0 \ub9e4\uae40<\/a>, <a href=\"https:\/\/www.couchbase.com\/blog\/ko\/ansi-join-support-n1ql\/\">\uc870\uc778 \ucd5c\uc801\ud654<\/a>, <a href=\"https:\/\/www.couchbase.com\/blog\/ko\/n1ql-and-search-how-to-leverage-fts-index-in-n1ql-query\/\">\uac80\uc0c9 \ucd5c\uc801\ud654<\/a>\uc5d0\uc11c \ubaa8\ub450 \uc124\uba85\ud588\uc2b5\ub2c8\ub2e4. \ud558\uc9c0\ub9cc \ub290\ub9ac\uae30\ub294 \ud558\uc9c0\ub9cc \ucffc\ub9ac\uc758 \uae30\ubcf8\uc801\uc774\uace0 \uac04\ub2e8\ud55c \uc2e4\ud589 \ud750\ub984\uc744 \uc774\ud574\ud558\ub294 \uac83\uc774 \uc911\uc694\ud569\ub2c8\ub2e4.<\/p>\n<p>\ub8e8\uce74\uc2a4 \uc5d0\ub354\uac00 \uc124\uba85\ud55c <a href=\"https:\/\/blog.jooq.org\/2016\/12\/09\/a-beginners-guide-to-the-true-order-of-sql-operations\/\">\uc2e4\uc81c SQL \uc2e4\ud589 \uc21c\uc11c<\/a>.  N1QL\uc740 SQL\uc5d0\uc11c \uc601\uac10\uc744 \uc5bb\uc5c8\uace0 SQL\uc744 \ubc00\uc811\ud558\uac8c \ub530\ub974\uae30 \ub54c\ubb38\uc5d0 \uc5ec\uae30\uc5d0\ub3c4 \uadf8 \uc124\uba85\uc774 \uc801\uc6a9\ub429\ub2c8\ub2e4.  \uaf2d \uc77d\uc5b4\ubcf4\uc2dc\uae30\ub97c \uc801\uadf9 \uad8c\uc7a5\ud569\ub2c8\ub2e4.<\/p>\n<p>N1QL\uc744 \uc0ac\uc6a9\ud558\uba74 \uc2dc\uac01\uc801 \uc124\uba85\uc744 \ud1b5\ud574 \uacc4\ud68d \uad6c\uc870\uc640 \ub370\uc774\ud130 \ud750\ub984\uc744 \ud655\uc778\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub807\uac8c \ud558\uba74 \uc778\ub371\uc2a4\ub97c \uc0dd\uc131\ud558\uc5ec \uc131\ub2a5\uc744 \ucd5c\uc801\ud654\ud558\uae30 \uc804\uc5d0 \uc2e4\ud589 \uc21c\uc11c\ub97c \uc27d\uac8c \uc774\ud574\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.  \uc800\ub294 \uae30\ubcf8 \uc81c\uacf5 \uc5ec\ud589 \uc0d8\ud50c\uc744 \uc0ac\uc6a9\ud588\uae30 \ub54c\ubb38\uc5d0 USE INDEX \ud78c\ud2b8\ub97c \uc0ac\uc6a9\ud558\uc5ec \uae30\ubcf8 \uc2a4\uce94\uc744 \uac15\uc81c\ub85c \uc218\ud589\ud588\uc2b5\ub2c8\ub2e4.<\/p>\n<pre class=\"theme:github toolbar:1 whitespace-before:2 whitespace-after:2 lang:mysql decode:true\" title=\"\uc0d8\ud50c N1QL \ucffc\ub9ac\">SELECT hotel.name,\r\n       hotel.country,\r\n       COUNT(hr.ratings.Service) csr,\r\n       RANK() OVER(ORDER BY COUNT(hr.ratings.Service) ),\r\n       DENSE_RANK() OVER(ORDER BY COUNT(hr.ratings.Service))\r\nFROM `travel-sample` AS hotel USE INDEX (def_primary)\r\n    INNER JOIN `travel-sample` AS airport ON (hotel.country = airport.country)\r\n        LEFT OUTER UNNEST \ud638\ud154.reviews AS hr\r\nWHERE hotel.type = \"hotel\"\r\n    AND airport.type = \"airport\"\r\n    AND hr.ratings.Service &gt;= 4\r\nGROUP BY hotel.name,\r\n         hotel.country\r\nHAVING COUNT(hr.ratings.Service) &gt; 0\r\nORDER BY COUNT(hr.ratings.Service)\r\nOFFSET 0\r\nLIMIT 10<\/pre>\n<p>\ub2e4\uc74c\uc740 \uc2dc\uac01\uc801 \uacc4\ud68d\uc785\ub2c8\ub2e4.  \uacc4\ud68d \uc2e4\ud589\uacfc \ub370\uc774\ud130 \ud750\ub984\uc740 \uc0c1\ud5a5\uc2dd\uc785\ub2c8\ub2e4. \uae30\ubcf8 \uc778\ub371\uc2a4 \uc2a4\uce94\uacfc \ubcf4\uc870 \uc778\ub371\uc2a4 \uc2a4\uce94\uc73c\ub85c \uc2dc\uc791\ud558\uc5ec \uacb0\uacfc\ub97c \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc5d0 \ubc18\ud658\ud558\uae30 \uc804\uc5d0 LIMIT \ud398\uc774\uc9c0 \ub9e4\uae40 \uc5f0\uc0b0\uc790\ub85c \ub05d\ub0a9\ub2c8\ub2e4.<\/p>\n<p>\uc2dc\uac01\uc801 \uc124\uba85\uc740 \ub300\ud654\ud615\uc785\ub2c8\ub2e4.  \uc544\ub798 \uc77c\ubd80 \uc5f0\uc0b0\uc790\uc5d0 \ud45c\uc2dc\ub41c \uac83\ucc98\ub7fc \uac01 \uc5f0\uc0b0\uc790\ub97c \ud074\ub9ad\ud558\uba74 \ucd5c\uc801\ud654 \ub3c4\uad6c\uac00 \ud574\ub2f9 \uc5f0\uc0b0\uc790\uc5d0 \uc124\uc815\ud55c \ub9e4\uac1c\ubcc0\uc218\ub97c \ud655\uc778\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<p><a href=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/2019\/06\/Screen-Shot-2019-06-08-at-4.40.08-AM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-7027 alignnone\" src=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/2019\/06\/Screen-Shot-2019-06-08-at-4.40.08-AM-300x168.png\" alt=\"\" width=\"789\" height=\"441\" srcset=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2019\/06\/Screen-Shot-2019-06-08-at-4.40.08-AM-300x168.png 300w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2019\/06\/Screen-Shot-2019-06-08-at-4.40.08-AM-1024x574.png 1024w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2019\/06\/Screen-Shot-2019-06-08-at-4.40.08-AM-768x430.png 768w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2019\/06\/Screen-Shot-2019-06-08-at-4.40.08-AM-1536x861.png 1536w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2019\/06\/Screen-Shot-2019-06-08-at-4.40.08-AM-20x11.png 20w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2019\/06\/Screen-Shot-2019-06-08-at-4.40.08-AM-1320x740.png 1320w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2019\/06\/Screen-Shot-2019-06-08-at-4.40.08-AM.png 2038w\" sizes=\"auto, (max-width: 789px) 100vw, 789px\" \/><\/a><\/p>\n<p><a href=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/2019\/06\/Screen-Shot-2019-06-08-at-4.41.06-AM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-7025 alignnone\" src=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/2019\/06\/Screen-Shot-2019-06-08-at-4.41.06-AM-300x129.png\" alt=\"\" width=\"787\" height=\"338\" srcset=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2019\/06\/Screen-Shot-2019-06-08-at-4.41.06-AM-300x129.png 300w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2019\/06\/Screen-Shot-2019-06-08-at-4.41.06-AM-1024x439.png 1024w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2019\/06\/Screen-Shot-2019-06-08-at-4.41.06-AM-768x330.png 768w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2019\/06\/Screen-Shot-2019-06-08-at-4.41.06-AM-1536x659.png 1536w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2019\/06\/Screen-Shot-2019-06-08-at-4.41.06-AM-20x9.png 20w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2019\/06\/Screen-Shot-2019-06-08-at-4.41.06-AM-1320x566.png 1320w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2019\/06\/Screen-Shot-2019-06-08-at-4.41.06-AM.png 2046w\" sizes=\"auto, (max-width: 787px) 100vw, 787px\" \/><\/a><a href=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/2019\/06\/Screen-Shot-2019-06-08-at-4.42.06-AM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-7024 alignnone\" src=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/2019\/06\/Screen-Shot-2019-06-08-at-4.42.06-AM-300x114.png\" alt=\"\" width=\"784\" height=\"298\" srcset=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2019\/06\/Screen-Shot-2019-06-08-at-4.42.06-AM-300x114.png 300w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2019\/06\/Screen-Shot-2019-06-08-at-4.42.06-AM-1024x391.png 1024w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2019\/06\/Screen-Shot-2019-06-08-at-4.42.06-AM-768x293.png 768w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2019\/06\/Screen-Shot-2019-06-08-at-4.42.06-AM-1536x586.png 1536w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2019\/06\/Screen-Shot-2019-06-08-at-4.42.06-AM-20x8.png 20w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2019\/06\/Screen-Shot-2019-06-08-at-4.42.06-AM-1320x503.png 1320w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2019\/06\/Screen-Shot-2019-06-08-at-4.42.06-AM.png 2048w\" sizes=\"auto, (max-width: 784px) 100vw, 784px\" \/><\/a><a href=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/2019\/06\/Screen-Shot-2019-06-08-at-4.43.06-AM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-7022 alignnone\" src=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/2019\/06\/Screen-Shot-2019-06-08-at-4.43.06-AM-300x149.png\" alt=\"\" width=\"789\" height=\"392\" srcset=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2019\/06\/Screen-Shot-2019-06-08-at-4.43.06-AM-300x149.png 300w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2019\/06\/Screen-Shot-2019-06-08-at-4.43.06-AM-1024x509.png 1024w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2019\/06\/Screen-Shot-2019-06-08-at-4.43.06-AM-768x382.png 768w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2019\/06\/Screen-Shot-2019-06-08-at-4.43.06-AM-1536x763.png 1536w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2019\/06\/Screen-Shot-2019-06-08-at-4.43.06-AM-20x10.png 20w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2019\/06\/Screen-Shot-2019-06-08-at-4.43.06-AM-1320x656.png 1320w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2019\/06\/Screen-Shot-2019-06-08-at-4.43.06-AM.png 2040w\" sizes=\"auto, (max-width: 789px) 100vw, 789px\" \/><\/a><\/p>\n<blockquote><p>\ucffc\ub9ac \uacc4\ud68d\uc740 \ub17c\ub9ac\uc801\uc73c\ub85c \uc774\ub807\uac8c \uc2dc\uc791\ub429\ub2c8\ub2e4.  \uc774 \uc704\uc5d0 \uc788\ub294 \ubaa8\ub4e0 \ucd5c\uc801\ud654\ub294 \uc0ac\ub78c\/\ub3c4\uad6c\uc5d0 \uc758\ud574 \uace0\ub824\ub418\uace0 \ucd5c\uc801\ud654 \ub3c4\uad6c\uac00 \ubaa8\ub4e0 \ucffc\ub9ac\uc5d0 \ub300\ud55c \ub370\uc774\ud130 \ud750\ub984 \uba38\uc2e0\uc744 \uad6c\uc131\ud558\uae30 \uc704\ud574 \uc120\ud0dd\ud569\ub2c8\ub2e4.  \uc635\ud2f0\ub9c8\uc774\uc800\uc758 \ubaa9\ud45c\ub294 \uac00\ub2a5\ud55c \ud55c \uc801\uc740 \uc791\uc5c5\uc744 \uc218\ud589\ud558\uba74\uc11c\ub3c4 \uc815\ud655\ud55c \uacb0\uacfc\ub97c \uc81c\uacf5\ud558\ub294 \uba38\uc2e0\uc744 \ub9cc\ub4dc\ub294 \uac83\uc785\ub2c8\ub2e4.<\/p><\/blockquote>","protected":false},"excerpt":{"rendered":"<p>\ucffc\ub9ac \uad6c\ubb38\uc774 \uc81c\ud55c\ub418\uc5b4 \uc788\uc2b5\ub2c8\ub2e4. \ucffc\ub9ac\ub294 \ubb34\uc81c\ud55c\uc785\ub2c8\ub2e4. \uc870\uac74\ubd80 \ud478\uc2dc\ub2e4\uc6b4, \ud478\uc2dc\ub2e4\uc6b4 \uae30\uc900 \uadf8\ub8f9\ud654, \uc624\ud504\uc14b \ud398\uc774\uc9c0 \ub9e4\uae40, \ud0a4\uc14b \ud398\uc774\uc9c0 \ub9e4\uae40, \uc870\uc778 \ucd5c\uc801\ud654, \uac80\uc0c9 \ucd5c\uc801\ud654 \ub4f1 \ubaa8\ub4e0 \uac83\uc5d0 \ub300\ud574 \uc124\uba85\ud574 \ub4dc\ub838\uc2b5\ub2c8\ub2e4. \ud558\uc9c0\ub9cc [...]\uc758 \ub290\ub9ac\uae34 \ud558\uc9c0\ub9cc \uac04\ub2e8\ud55c \uae30\ubcf8 \uc2e4\ud589 \ud750\ub984\uc744 \uc774\ud574\ud558\ub294 \uac83\uc774 \uc911\uc694\ud569\ub2c8\ub2e4.<\/p>","protected":false},"author":55,"featured_media":7028,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[1815,1812],"tags":[1572,2375,1725,1906,2376],"ppma_author":[8929],"class_list":["post-7021","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-best-practices-and-tutorials","category-n1ql-query","tag-database","tag-explain","tag-nosql-database","tag-optimizer","tag-plan"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.0 (Yoast SEO v26.0) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>N1QL (Query) Basic Order of Execution. - The Couchbase Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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Queries are unlimited. Predicate pushdown, group by pushdown, offset pagination, keyset pagination, join optimization, search optimization, we&#8217;ve discussed it all. Still, it&#8217;s important to understand the default, simple &#8212; albeit slow &#8212; execution flow of the [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.couchbase.com\/blog\/ko\/n1ql-query-basic-order-of-execution\/\" \/>\n<meta property=\"og:site_name\" content=\"The Couchbase Blog\" \/>\n<meta property=\"article:published_time\" content=\"2019-06-08T12:30:12+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-06-14T06:42:51+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2019\/06\/N1QL-Optimizer.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1186\" \/>\n\t<meta property=\"og:image:height\" content=\"662\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Keshav Murthy\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@rkeshavmurthy\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Keshav Murthy\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\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\":\"Article\",\"@id\":\"https:\/\/www.couchbase.com\/blog\/n1ql-query-basic-order-of-execution\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.couchbase.com\/blog\/n1ql-query-basic-order-of-execution\/\"},\"author\":{\"name\":\"Keshav Murthy\",\"@id\":\"https:\/\/www.couchbase.com\/blog\/#\/schema\/person\/c261644262bf98e146372fe647682636\"},\"headline\":\"N1QL (Query) Basic Order of Execution.\",\"datePublished\":\"2019-06-08T12:30:12+00:00\",\"dateModified\":\"2025-06-14T06:42:51+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.couchbase.com\/blog\/n1ql-query-basic-order-of-execution\/\"},\"wordCount\":258,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.couchbase.com\/blog\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.couchbase.com\/blog\/n1ql-query-basic-order-of-execution\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2019\/06\/N1QL-Optimizer.png\",\"keywords\":[\"database\",\"explain\",\"NoSQL Database\",\"Optimizer\",\"plan\"],\"articleSection\":[\"Best Practices and Tutorials\",\"SQL++ \/ N1QL Query\"],\"inLanguage\":\"ko-KR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.couchbase.com\/blog\/n1ql-query-basic-order-of-execution\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.couchbase.com\/blog\/n1ql-query-basic-order-of-execution\/\",\"url\":\"https:\/\/www.couchbase.com\/blog\/n1ql-query-basic-order-of-execution\/\",\"name\":\"N1QL (Query) Basic Order of Execution. - 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