{"id":2719,"date":"2023-07-21T00:54:50","date_gmt":"2023-07-21T00:54:50","guid":{"rendered":"https:\/\/statorials.org\/pt\/grupo-mongodb-por-soma\/"},"modified":"2023-07-21T00:54:50","modified_gmt":"2023-07-21T00:54:50","slug":"grupo-mongodb-por-soma","status":"publish","type":"post","link":"https:\/\/statorials.org\/pt\/grupo-mongodb-por-soma\/","title":{"rendered":"Mongodb: como agrupar e somar"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Voc\u00ea pode usar a seguinte sintaxe para agrupar e contar no MongoDB:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>db.collection.aggregate([\n    { <span style=\"color: #ff0000;\">$group<\/span> : { <span style=\"color: #3366ff;\">_id<\/span> : \" <span style=\"color: #ff0000;\">$field_name1<\/span> \", <span style=\"color: #3366ff;\">count<\/span> :{ <span style=\"color: #3366ff;\">$sum<\/span> : \" <span style=\"color: #ff0000;\">$field_name2<\/span> \"}}}\n])<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Observe que <span style=\"padding: 1px; border: 1px solid black;\">field_name1<\/span> \u00e9 o campo pelo qual voc\u00ea deseja agrupar e <span style=\"padding: 1px; border: 1px solid black;\">field_name2<\/span> \u00e9 o campo que voc\u00ea deseja somar.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Os exemplos a seguir mostram como usar essa sintaxe com uma <span style=\"padding: 1px; border: 1px solid black;\">equipe<\/span> de cobran\u00e7a com os seguintes documentos:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>db.teams.insertOne({team: \" <span style=\"color: #008000;\">Mavs<\/span> \", position: \" <span style=\"color: #008000;\">Guard<\/span> \", points: <span style=\"color: #ff0000;\">31<\/span> })<\/strong>\n<strong>db.teams.insertOne({team: \" <span style=\"color: #008000;\">Spurs<\/span> \", position: \" <span style=\"color: #008000;\">Forward<\/span> \", points: <span style=\"color: #ff0000;\">22<\/span> })<\/strong>\n<strong>db.teams.insertOne({team: \" <span style=\"color: #008000;\">Rockets<\/span> \", position: \" <span style=\"color: #008000;\">Center<\/span> \", points: <span style=\"color: #ff0000;\">19<\/span> })<\/strong>\n<strong>db.teams.insertOne({team: \" <span style=\"color: #008000;\">Warriors<\/span> \", position: \" <span style=\"color: #008000;\">Forward<\/span> \", points: <span style=\"color: #ff0000;\">26<\/span> })<\/strong>\n<strong>db.teams.insertOne({team: \" <span style=\"color: #008000;\">Cavs<\/span> \", position: \" <span style=\"color: #008000;\">Guard<\/span> \", points: <span style=\"color: #ff0000;\">33<\/span> })<\/strong><\/pre>\n<h3> <span style=\"color: #000000;\"><strong>Exemplo 1: agrupar por e soma<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Podemos usar o c\u00f3digo a seguir para agrupar por campo \u201cposi\u00e7\u00e3o\u201d e contar a soma dos pontos de cada posi\u00e7\u00e3o.<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>db.teams.aggregate([\n    { <span style=\"color: #ff0000;\">$group<\/span> : { <span style=\"color: #3366ff;\">_id<\/span> : \" <span style=\"color: #ff0000;\">$position<\/span> \", <span style=\"color: #3366ff;\">count<\/span> :{ <span style=\"color: #3366ff;\">$sum<\/span> : \" <span style=\"color: #ff0000;\">$points<\/span> \"}}}\n])\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Isso retorna os seguintes resultados:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>{ _id: ' <span style=\"color: #008000;\">Forward<\/span> ', count: 48 }\n{ _id: ' <span style=\"color: #008000;\">Guard<\/span> ', count: 64 }\n{ _id: ' <span style=\"color: #008000;\">Center<\/span> ', count: 19 }<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Isso nos diz:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">Os jogadores na posi\u00e7\u00e3o \u201cAtacante\u201d somam <strong>48<\/strong> pontos no total.<\/span><\/li>\n<li> <span style=\"color: #000000;\">Os jogadores com a posi\u00e7\u00e3o \u201cGuarda\u201d somam <b>64<\/b> pontos no total.<\/span><\/li>\n<li> <span style=\"color: #000000;\">Os jogadores na posi\u00e7\u00e3o \u201cCentro\u201d t\u00eam um total de <b>19<\/b> pontos.<\/span><\/li>\n<\/ul>\n<h3> <span style=\"color: #000000;\"><strong>Exemplo 2: agrupar por e adicionar (depois classificar)<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Podemos usar o c\u00f3digo a seguir para encontrar a soma dos pontos de cada posi\u00e7\u00e3o e classificar automaticamente os resultados em <strong>ordem crescente<\/strong> :<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>db.teams.aggregate([\n    { <span style=\"color: #ff0000;\">$group<\/span> : { <span style=\"color: #3366ff;\">_id<\/span> : \" <span style=\"color: #ff0000;\">$position<\/span> \", <span style=\"color: #3366ff;\">count<\/span> :{ <span style=\"color: #3366ff;\">$sum<\/span> : \" <span style=\"color: #ff0000;\">$points<\/span> \"}}},\n    { <span style=\"color: #ff0000;\">$sort<\/span> : { <span style=\"color: #3366ff;\">count<\/span> : 1}} \n])\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Isso retorna os seguintes resultados:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>{ _id: ' <span style=\"color: #008000;\">Center<\/span> ', count: 19 }\n{ _id: ' <span style=\"color: #008000;\">Forward<\/span> ', count: 48 }\n{ _id: ' <span style=\"color: #008000;\">Guard<\/span> ', count: 64 }<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Os resultados s\u00e3o classificados por pontos em <strong>ordem crescente<\/strong> (do menor para o maior).<\/span><\/p>\n<p> <span style=\"color: #000000;\">Podemos usar <strong>-1<\/strong> no argumento count para classificar os resultados em <strong>ordem decrescente<\/strong> :<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>db.teams.aggregate([\n    { <span style=\"color: #ff0000;\">$group<\/span> : { <span style=\"color: #3366ff;\">_id<\/span> : \" <span style=\"color: #ff0000;\">$position<\/span> \", <span style=\"color: #3366ff;\">count<\/span> :{ <span style=\"color: #3366ff;\">$sum<\/span> : \" <span style=\"color: #ff0000;\">$points<\/span> \"}}},\n    { <span style=\"color: #ff0000;\">$sort<\/span> : { <span style=\"color: #3366ff;\">count<\/span> :-1}} \n])\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Isso retorna os seguintes resultados:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>{ _id: ' <span style=\"color: #008000;\">Guard<\/span> ', count: 64 }\n{ _id: ' <span style=\"color: #008000;\">Forward<\/span> ', count: 48 }\n{ _id: ' <span style=\"color: #008000;\">Center<\/span> ', count: 19 }<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Observe que os resultados s\u00e3o classificados por pontos em <strong>ordem decrescente<\/strong> (do maior para o menor).<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>Nota<\/strong> : Voc\u00ea pode encontrar a documenta\u00e7\u00e3o completa do <strong>$group<\/strong> <a href=\"https:\/\/docs.mongodb.com\/manual\/reference\/operator\/aggregation\/group\/\" target=\"_blank\" rel=\"noopener\">aqui<\/a> .<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Recursos adicionais<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Os tutoriais a seguir explicam como realizar outras opera\u00e7\u00f5es comuns no MongoDB:<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/pt\/conta-separada-mongodb\/\" target=\"_blank\" rel=\"noopener\">MongoDB: Como contar valores distintos em um campo<\/a><br \/><a href=\"https:\/\/statorials.org\/pt\/grupo-mongodb-por-varios-campos\/\" target=\"_blank\" rel=\"noopener\">MongoDB: Como agrupar por v\u00e1rios campos<\/a><br \/> <a href=\"https:\/\/statorials.org\/pt\/grupo-mongodb-por-numero\/\" target=\"_blank\" rel=\"noopener\">MongoDB: Como agrupar e contar<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Voc\u00ea pode usar a seguinte sintaxe para agrupar e contar no MongoDB: db.collection.aggregate([ { $group : { _id : &#8221; $field_name1 &#8220;, count :{ $sum : &#8221; $field_name2 &#8220;}}} ]) Observe que field_name1 \u00e9 o campo pelo qual voc\u00ea deseja agrupar e field_name2 \u00e9 o campo que voc\u00ea deseja somar. Os exemplos a seguir mostram [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"class_list":["post-2719","post","type-post","status-publish","format-standard","hentry","category-guia"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>MongoDB: Como agrupar e adicionar - Estatologia<\/title>\n<meta name=\"description\" content=\"Este tutorial explica como agrupar e somar no MongoDB, com exemplos.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/statorials.org\/pt\/grupo-mongodb-por-soma\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"MongoDB: Como agrupar e adicionar - Estatologia\" \/>\n<meta property=\"og:description\" content=\"Este tutorial explica como agrupar e somar no MongoDB, com exemplos.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pt\/grupo-mongodb-por-soma\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-21T00:54:50+00:00\" \/>\n<meta name=\"author\" content=\"Dr. benjamim anderson\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Escrito por\" \/>\n\t<meta name=\"twitter:data1\" content=\"Dr. benjamim anderson\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tempo estimado de leitura\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/statorials.org\/pt\/grupo-mongodb-por-soma\/\",\"url\":\"https:\/\/statorials.org\/pt\/grupo-mongodb-por-soma\/\",\"name\":\"MongoDB: Como agrupar e adicionar - Estatologia\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pt\/#website\"},\"datePublished\":\"2023-07-21T00:54:50+00:00\",\"dateModified\":\"2023-07-21T00:54:50+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pt\/#\/schema\/person\/e08f98e8db95e0aa9c310e1b27c9c666\"},\"description\":\"Este tutorial explica como agrupar e somar no MongoDB, com exemplos.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pt\/grupo-mongodb-por-soma\/#breadcrumb\"},\"inLanguage\":\"pt-PT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pt\/grupo-mongodb-por-soma\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pt\/grupo-mongodb-por-soma\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Lar\",\"item\":\"https:\/\/statorials.org\/pt\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Mongodb: como agrupar e somar\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/statorials.org\/pt\/#website\",\"url\":\"https:\/\/statorials.org\/pt\/\",\"name\":\"Statorials\",\"description\":\"O seu guia para a literacia estat\u00edstica!\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/statorials.org\/pt\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"pt-PT\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/statorials.org\/pt\/#\/schema\/person\/e08f98e8db95e0aa9c310e1b27c9c666\",\"name\":\"Dr. benjamim anderson\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"pt-PT\",\"@id\":\"https:\/\/statorials.org\/pt\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/statorials.org\/pt\/wp-content\/uploads\/2023\/10\/Dr.-Benjamin-Anderson-96x96.jpg\",\"contentUrl\":\"https:\/\/statorials.org\/pt\/wp-content\/uploads\/2023\/10\/Dr.-Benjamin-Anderson-96x96.jpg\",\"caption\":\"Dr. benjamim anderson\"},\"description\":\"Ol\u00e1, sou Benjamin, um professor aposentado de estat\u00edstica que se tornou professor dedicado na Statorials. 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