{"id":2443,"date":"2023-07-22T06:16:57","date_gmt":"2023-07-22T06:16:57","guid":{"rendered":"https:\/\/statorials.org\/pl\/mongodb-znajdz-duplikaty\/"},"modified":"2023-07-22T06:16:57","modified_gmt":"2023-07-22T06:16:57","slug":"mongodb-znajdz-duplikaty","status":"publish","type":"post","link":"https:\/\/statorials.org\/pl\/mongodb-znajdz-duplikaty\/","title":{"rendered":"Jak znale\u017a\u0107 duplikaty w mongodb"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Aby znale\u017a\u0107 dokumenty ze zduplikowanymi warto\u015bciami w MongoDB, mo\u017cesz u\u017cy\u0107 nast\u0119puj\u0105cej sk\u0142adni:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>db.collection.aggregate([\n    {\" <span style=\"color: #ff0000;\">$group<\/span> \": { \"_id\": \" <span style=\"color: #ff0000;\">$field1<\/span> \", \"count\": { \" <span style=\"color: #ff0000;\">$sum<\/span> \": 1 } } },\n    {\" <span style=\"color: #ff0000;\">$match<\/span> \": {\"_id\" :{ \" <span style=\"color: #ff0000;\">$ne<\/span> \" : null } , \"count\" : {\" <span style=\"color: #ff0000;\">$gt<\/span> \": 1} } }, \n    {\" <span style=\"color: #ff0000;\">$project<\/span> \": {\"name\": \" <span style=\"color: #ff0000;\">$_id<\/span> \", \"_id\": 0} }\n])\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Oto, co robi ta sk\u0142adnia:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>Zgrupuj<\/strong> wszystkie dokumenty o tej samej warto\u015bci w polu 1<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>Dopasuj<\/strong> grupy, kt\u00f3re maj\u0105 wi\u0119cej ni\u017c jeden dokument<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>Wy\u015bwietlaj<\/strong> wszystkie grupy, kt\u00f3re maj\u0105 wi\u0119cej ni\u017c jeden dokument<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">To konkretne zapytanie szuka zduplikowanych warto\u015bci w kolumnie <strong>pole1<\/strong> . Po prostu edytuj t\u0119 warto\u015b\u0107, aby zmieni\u0107 pole wyszukiwania.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Poni\u017cszy przyk\u0142ad pokazuje, jak u\u017cywa\u0107 tej sk\u0142adni w przypadku <span style=\"padding: 1px; border: 1px solid black;\">zespo\u0142u<\/span> zbieraj\u0105cego z nast\u0119puj\u0105cymi dokumentami:<\/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;\">Mavs<\/span> \", position: \" <span style=\"color: #008000;\">Guard<\/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;\">Rockets<\/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>Przyk\u0142ad: Znajd\u017a dokumenty ze zduplikowanymi warto\u015bciami<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Mo\u017cemy u\u017cy\u0107 poni\u017cszego kodu, aby znale\u017a\u0107 wszystkie zduplikowane warto\u015bci w kolumnie \u201ezesp\u00f3\u0142\u201d:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>db.teams.aggregate([\n    {\" <span style=\"color: #ff0000;\">$group<\/span> \": { \"_id\": \" <span style=\"color: #ff0000;\">$team<\/span> \", \"count\": { \" <span style=\"color: #ff0000;\">$sum<\/span> \": 1 } } },\n    {\" <span style=\"color: #ff0000;\">$match<\/span> \": {\"_id\" :{ \" <span style=\"color: #ff0000;\">$ne<\/span> \" : null } , \"count\" : {\" <span style=\"color: #ff0000;\">$gt<\/span> \": 1} } }, \n    {\" <span style=\"color: #ff0000;\">$project<\/span> \": {\"name\": \" <span style=\"color: #ff0000;\">$_id<\/span> \", \"_id\": 0} }\n])<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">To zapytanie zwraca nast\u0119puj\u0105ce wyniki:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>{ name: 'Rockets' }\n{ name: 'Mavs' }<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">To m\u00f3wi nam, \u017ce warto\u015bci \u201eRakiety\u201d i \u201eMavs\u201d pojawiaj\u0105 si\u0119 wielokrotnie w polu \u201ezesp\u00f3\u0142\u201d.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Zauwa\u017c, \u017ce mo\u017cemy po prostu zast\u0105pi\u0107 <strong>$team<\/strong> <strong>$position<\/strong> , aby zamiast tego szuka\u0107 zduplikowanych warto\u015bci w polu \u201eposition\u201d:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>db.teams.aggregate([\n    {\" <span style=\"color: #ff0000;\">$group<\/span> \": { \"_id\": \" <span style=\"color: #ff0000;\">$position<\/span> \", \"count\": { \" <span style=\"color: #ff0000;\">$sum<\/span> \": 1 } } },\n    {\" <span style=\"color: #ff0000;\">$match<\/span> \": {\"_id\" :{ \" <span style=\"color: #ff0000;\">$ne<\/span> \" : null } , \"count\" : {\" <span style=\"color: #ff0000;\">$gt<\/span> \": 1} } }, \n    {\" <span style=\"color: #ff0000;\">$project<\/span> \": {\"name\": \" <span style=\"color: #ff0000;\">$_id<\/span> \", \"_id\": 0} }\n])<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">To zapytanie zwraca nast\u0119puj\u0105ce wyniki:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>{ name: 'Guard' }\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">To m\u00f3wi nam, \u017ce \u201eStra\u017c\u201d pojawia si\u0119 kilka razy w polu \u201ePozycja\u201d.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Dodatkowe zasoby<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Poni\u017csze samouczki wyja\u015bniaj\u0105, jak wykonywa\u0107 inne typowe operacje w MongoDB:<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/pl\/pole-dodawania-mongodb\/\" target=\"_blank\" rel=\"noopener\">MongoDB: Jak doda\u0107 nowe pole do kolekcji<\/a><br \/> <a href=\"https:\/\/statorials.org\/pl\/grupa-mongodb-wed\u0142ug-numeru\/\" target=\"_blank\" rel=\"noopener\">MongoDB: Jak grupowa\u0107 i liczy\u0107<\/a><br \/><a href=\"https:\/\/statorials.org\/pl\/grupa-mongodb-wed\u0142ug-wielu-pol\/\" target=\"_blank\" rel=\"noopener\">MongoDB: Jak grupowa\u0107 wed\u0142ug wielu p\u00f3l<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Aby znale\u017a\u0107 dokumenty ze zduplikowanymi warto\u015bciami w MongoDB, mo\u017cesz u\u017cy\u0107 nast\u0119puj\u0105cej sk\u0142adni: db.collection.aggregate([ {&#8221; $group &#8222;: { &#8222;_id&#8221;: &#8221; $field1 &#8222;, &#8222;count&#8221;: { &#8221; $sum &#8222;: 1 } } }, {&#8221; $match &#8222;: {&#8222;_id&#8221; :{ &#8221; $ne &#8221; : null } , &#8222;count&#8221; : {&#8221; $gt &#8222;: 1} } }, {&#8221; $project &#8222;: {&#8222;name&#8221;: &#8221; [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-2443","post","type-post","status-publish","format-standard","hentry","category-przewodnik"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Jak znale\u017a\u0107 duplikaty w MongoDB \u2013 Statologia<\/title>\n<meta name=\"description\" content=\"W tym samouczku wyja\u015bniono, jak znale\u017a\u0107 zduplikowane warto\u015bci w MongoDB, podaj\u0105c kilka przyk\u0142ad\u00f3w.\" \/>\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\/pl\/mongodb-znajdz-duplikaty\/\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Jak znale\u017a\u0107 duplikaty w MongoDB \u2013 Statologia\" \/>\n<meta property=\"og:description\" content=\"W tym samouczku wyja\u015bniono, jak znale\u017a\u0107 zduplikowane warto\u015bci w MongoDB, podaj\u0105c kilka przyk\u0142ad\u00f3w.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pl\/mongodb-znajdz-duplikaty\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-22T06:16:57+00:00\" \/>\n<meta name=\"author\" content=\"Benjamin Anderson\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Napisane przez\" \/>\n\t<meta name=\"twitter:data1\" content=\"Benjamin Anderson\" \/>\n\t<meta name=\"twitter:label2\" content=\"Szacowany czas czytania\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minuty\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/statorials.org\/pl\/mongodb-znajdz-duplikaty\/\",\"url\":\"https:\/\/statorials.org\/pl\/mongodb-znajdz-duplikaty\/\",\"name\":\"Jak znale\u017a\u0107 duplikaty w MongoDB \u2013 Statologia\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pl\/#website\"},\"datePublished\":\"2023-07-22T06:16:57+00:00\",\"dateModified\":\"2023-07-22T06:16:57+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/6484727a4612df3e69f016c3129c6965\"},\"description\":\"W tym samouczku wyja\u015bniono, jak znale\u017a\u0107 zduplikowane warto\u015bci w MongoDB, podaj\u0105c kilka przyk\u0142ad\u00f3w.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pl\/mongodb-znajdz-duplikaty\/#breadcrumb\"},\"inLanguage\":\"pl-PL\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pl\/mongodb-znajdz-duplikaty\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pl\/mongodb-znajdz-duplikaty\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Dom\",\"item\":\"https:\/\/statorials.org\/pl\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Jak znale\u017a\u0107 duplikaty w mongodb\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/statorials.org\/pl\/#website\",\"url\":\"https:\/\/statorials.org\/pl\/\",\"name\":\"Statorials\",\"description\":\"Tw\u00f3j przewodnik po kompetencjach statystycznych!\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/statorials.org\/pl\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"pl-PL\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/6484727a4612df3e69f016c3129c6965\",\"name\":\"Benjamin Anderson\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"pl-PL\",\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/statorials.org\/pl\/wp-content\/uploads\/2023\/11\/Benjamin-Anderson-96x96.jpg\",\"contentUrl\":\"https:\/\/statorials.org\/pl\/wp-content\/uploads\/2023\/11\/Benjamin-Anderson-96x96.jpg\",\"caption\":\"Benjamin Anderson\"},\"description\":\"Cze\u015b\u0107, jestem Benjamin i jestem emerytowanym profesorem statystyki, kt\u00f3ry zosta\u0142 oddanym nauczycielem Statorials. 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