{"id":2755,"date":"2023-07-20T20:46:38","date_gmt":"2023-07-20T20:46:38","guid":{"rendered":"https:\/\/statorials.org\/tr\/mongodb-alt-dizesi\/"},"modified":"2023-07-20T20:46:38","modified_gmt":"2023-07-20T20:46:38","slug":"mongodb-alt-dizesi","status":"publish","type":"post","link":"https:\/\/statorials.org\/tr\/mongodb-alt-dizesi\/","title":{"rendered":"Mongodb: $susbtr i\u015flevi nas\u0131l kullan\u0131l\u0131r?"},"content":{"rendered":"

<\/p>\n

\n

Bir dizeden bir alt dize \u00e7\u0131karmak i\u00e7in MongoDB’deki $substr<\/strong> i\u015flevini kullanabilirsiniz.<\/span><\/p>\n

Bu i\u015flev a\u015fa\u011f\u0131daki temel s\u00f6zdizimini kullan\u0131r:<\/span><\/p>\n

 db.myCollection.aggregate([\n  { $project<\/span> : {substring: { $substr<\/span> : [ \" $fullstring<\/span> \", 0, 4 ] }}}\n])<\/strong><\/pre>\n
 Bu \u00f6zel \u00f6rnek, 0 konumundan ba\u015flayarak “fullString” etiketli alandan d\u00f6rt karakterin t\u00fcm\u00fcn\u00fc \u00e7\u0131kar\u0131r.<\/span><\/p>\n
 A\u015fa\u011f\u0131daki \u00f6rnek, bu s\u00f6zdiziminin pratikte a\u015fa\u011f\u0131daki belgelerle bir koleksiyon sat\u0131\u015f\u0131nda<\/span> nas\u0131l kullan\u0131laca\u011f\u0131n\u0131 g\u00f6sterir:<\/span><\/p>\n
 db.sales.insertOne({yearMonth: 201702, amount: 40<\/span> })\ndb.sales.insertOne({yearMonth: 201802, amount: 32<\/span> })\ndb.sales.insertOne({yearMonth: 201806, amount: 19<\/span> })\ndb.sales.insertOne({yearMonth: 201910, amount: 29<\/span> })\ndb.sales.insertOne({yearMonth: 201907, amount: 35<\/span> })<\/strong><\/pre>\n
 \u00d6rnek: MongoDB’de $susbtr i\u015flevi nas\u0131l kullan\u0131l\u0131r?<\/strong><\/span><\/h3>\n
 “yearMonth” alan\u0131ndan ilk d\u00f6rt karakteri \u00e7\u0131karmak ve bunlar\u0131 “year” adl\u0131 yeni bir alanda g\u00f6r\u00fcnt\u00fclemek i\u00e7in a\u015fa\u011f\u0131daki kodu kullanabiliriz:<\/span><\/p>\n
 db.sales.aggregate([\n  { $project<\/span> : {year: { $substr<\/span> : [ \" $yearMonth<\/span> \", 0, 4 ] }}}\n])\n<\/strong><\/pre>\n
 Bu kod a\u015fa\u011f\u0131daki sonucu \u00fcretir:<\/span><\/p>\n
 { _id: ObjectId(\"620145544cb04b772fd7a929\"), year: '2017' }\n{ _id: ObjectId(\"620145544cb04b772fd7a92a\"), year: '2018' }\n{ _id: ObjectId(\"620145544cb04b772fd7a92b\"), year: '2018' }\n{ _id: ObjectId(\"620145544cb04b772fd7a92c\"), year: '2019' }\n{ _id: ObjectId(\"620145544cb04b772fd7a92d\"), year: '2019' }<\/strong><\/pre>\n
 Her belgenin “ayY\u0131l” alan\u0131n\u0131n ilk d\u00f6rt karakterinin “y\u0131l” etiketli yeni bir alanda g\u00f6r\u00fcnt\u00fclendi\u011fini unutmay\u0131n.<\/span><\/p>\n
 Bu kodun yaln\u0131zca alt dizeyi g\u00f6r\u00fcnt\u00fcledi\u011fine<\/em> dikkat etmek \u00f6nemlidir.<\/span><\/p>\n
 Bu alt dizeyi i\u00e7eren koleksiyona ger\u00e7ekten yeni bir alan eklemek i\u00e7in $merge<\/strong> i\u015flevini a\u015fa\u011f\u0131daki gibi kullanmam\u0131z gerekir:<\/span><\/p>\n
 db.sales.aggregate([\n  { $project<\/span> : {year: { $substr<\/span> : [ \" $yearMonth<\/span> \", 0, 4 ] }}},\n  { $merge<\/span> : \"sales\" }\n])<\/strong><\/pre>\n
 G\u00fcncellenen koleksiyon art\u0131k \u015f\u00f6yle g\u00f6r\u00fcn\u00fcyor:<\/span><\/p>\n
 { _id: ObjectId(\"620145544cb04b772fd7a929\"),\n  yearMonth: 201702,\n  amount: 40,\n  year: '2017' }\n{ _id: ObjectId(\"620145544cb04b772fd7a92a\"),\n  yearMonth: 201802,\n  amount: 32,\n  year: '2018' }\n{ _id: ObjectId(\"620145544cb04b772fd7a92b\"),\n  yearMonth: 201806,\n  amount: 19,\n  year: '2018' }\n{ _id: ObjectId(\"620145544cb04b772fd7a92c\"),\n  yearMonth: 201910,\n  amount: 29,\n  year: '2019' }\n{ _id: ObjectId(\"620145544cb04b772fd7a92d\"),\n  yearMonth: 201907,\n  amount: 35,\n  year: '2019' }<\/strong><\/pre>\n
 Koleksiyondaki her belgeye “y\u0131l” ba\u015fl\u0131kl\u0131 yeni alan\u0131n eklendi\u011fini ve “y\u0131lAy” alan\u0131n\u0131n ilk d\u00f6rt karakterini g\u00f6r\u00fcnt\u00fcledi\u011fini unutmay\u0131n.<\/span><\/p>\n
 Not<\/strong> : $substr<\/strong> i\u015flevine ili\u015fkin t\u00fcm belgeleri burada<\/a> bulabilirsiniz.<\/span><\/p>\n
 Ek kaynaklar<\/strong><\/span><\/h3>\n
 A\u015fa\u011f\u0131daki e\u011fitimlerde MongoDB’de di\u011fer yayg\u0131n i\u015flemlerin nas\u0131l ger\u00e7ekle\u015ftirilece\u011fi a\u00e7\u0131klanmaktad\u0131r:<\/span><\/p>\n
 MongoDB: Alan\u0131n bir dize i\u00e7erip i\u00e7ermedi\u011fi nas\u0131l kontrol edilir<\/a>
 MongoDB: \u0130ki alan\u0131n dizeleri nas\u0131l birle\u015ftirilir<\/a>
 MongoDB: Dizeler nas\u0131l de\u011fi\u015ftirilir?<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
Bir dizeden bir alt dize \u00e7\u0131karmak i\u00e7in MongoDB’deki $substr i\u015flevini kullanabilirsiniz. Bu i\u015flev a\u015fa\u011f\u0131daki temel s\u00f6zdizimini kullan\u0131r: db.myCollection.aggregate([ { $project : {substring: { $substr : [ ” $fullstring “, 0, 4 ] }}} ]) Bu \u00f6zel \u00f6rnek, 0 konumundan ba\u015flayarak “fullString” etiketli alandan d\u00f6rt karakterin t\u00fcm\u00fcn\u00fc \u00e7\u0131kar\u0131r. A\u015fa\u011f\u0131daki \u00f6rnek, bu s\u00f6zdiziminin pratikte a\u015fa\u011f\u0131daki belgelerle bir […]<\/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-2755","post","type-post","status-publish","format-standard","hentry","category-rehber"],"yoast_head":"\nMongoDB: $susbtr i\u015flevi nas\u0131l kullan\u0131l\u0131r - Statorials<\/title>\n<meta name=\"description\" content=\"Bu e\u011fitimde, bir dizeden bir alt dize \u00e7\u0131karmak i\u00e7in MongoDB'deki substr i\u015flevinin nas\u0131l kullan\u0131laca\u011f\u0131 \u00f6rneklerle a\u00e7\u0131klanmaktad\u0131r.\" \/>\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\/tr\/mongodb-alt-dizesi\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"MongoDB: $susbtr i\u015flevi nas\u0131l kullan\u0131l\u0131r - Statorials\" \/>\n<meta property=\"og:description\" content=\"Bu e\u011fitimde, bir dizeden bir alt dize \u00e7\u0131karmak i\u00e7in MongoDB'deki substr i\u015flevinin nas\u0131l kullan\u0131laca\u011f\u0131 \u00f6rneklerle a\u00e7\u0131klanmaktad\u0131r.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/tr\/mongodb-alt-dizesi\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-20T20:46:38+00:00\" \/>\n<meta name=\"author\" content=\"Dr.benjamin anderson\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Yazan:\" \/>\n\t<meta name=\"twitter:data1\" content=\"Dr.benjamin anderson\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tahmini okuma s\u00fcresi\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 dakika\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/statorials.org\/tr\/mongodb-alt-dizesi\/\",\"url\":\"https:\/\/statorials.org\/tr\/mongodb-alt-dizesi\/\",\"name\":\"MongoDB: $susbtr i\u015flevi nas\u0131l kullan\u0131l\u0131r - Statorials\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/tr\/#website\"},\"datePublished\":\"2023-07-20T20:46:38+00:00\",\"dateModified\":\"2023-07-20T20:46:38+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/tr\/#\/schema\/person\/365dc158a39a7c8ae256355451e3de48\"},\"description\":\"Bu e\u011fitimde, bir dizeden bir alt dize \u00e7\u0131karmak i\u00e7in MongoDB'deki substr i\u015flevinin nas\u0131l kullan\u0131laca\u011f\u0131 \u00f6rneklerle a\u00e7\u0131klanmaktad\u0131r.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/tr\/mongodb-alt-dizesi\/#breadcrumb\"},\"inLanguage\":\"tr\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/tr\/mongodb-alt-dizesi\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/tr\/mongodb-alt-dizesi\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Ev\",\"item\":\"https:\/\/statorials.org\/tr\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Mongodb: $susbtr i\u015flevi nas\u0131l kullan\u0131l\u0131r?\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/statorials.org\/tr\/#website\",\"url\":\"https:\/\/statorials.org\/tr\/\",\"name\":\"Statorials\",\"description\":\"\u0130statistik okuryazarl\u0131\u011f\u0131 rehberiniz!\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/statorials.org\/tr\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"tr\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/statorials.org\/tr\/#\/schema\/person\/365dc158a39a7c8ae256355451e3de48\",\"name\":\"Dr.benjamin anderson\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"tr\",\"@id\":\"https:\/\/statorials.org\/tr\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/statorials.org\/tr\/wp-content\/uploads\/2023\/10\/Dr.-Benjamin-Anderson-96x96.jpg\",\"contentUrl\":\"https:\/\/statorials.org\/tr\/wp-content\/uploads\/2023\/10\/Dr.-Benjamin-Anderson-96x96.jpg\",\"caption\":\"Dr.benjamin anderson\"},\"description\":\"Merhaba, ben Benjamin, emekli bir istatistik profes\u00f6r\u00fc ve Statorials \u00f6\u011fretmenine d\u00f6n\u00fc\u015ft\u00fcm. \u0130statistik alan\u0131ndaki kapsaml\u0131 deneyimim ve uzmanl\u0131\u011f\u0131mla, \u00f6\u011frencilerimi Statorials arac\u0131l\u0131\u011f\u0131yla g\u00fc\u00e7lendirmek i\u00e7in bilgilerimi payla\u015fmaya can at\u0131yorum. Daha fazlas\u0131n\u0131 bil\",\"sameAs\":[\"https:\/\/statorials.org\/tr\"]}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"MongoDB: $susbtr i\u015flevi nas\u0131l kullan\u0131l\u0131r - Statorials","description":"Bu e\u011fitimde, bir dizeden bir alt dize \u00e7\u0131karmak i\u00e7in MongoDB'deki substr i\u015flevinin nas\u0131l kullan\u0131laca\u011f\u0131 \u00f6rneklerle a\u00e7\u0131klanmaktad\u0131r.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/statorials.org\/tr\/mongodb-alt-dizesi\/","og_locale":"tr_TR","og_type":"article","og_title":"MongoDB: $susbtr i\u015flevi nas\u0131l kullan\u0131l\u0131r - Statorials","og_description":"Bu e\u011fitimde, bir dizeden bir alt dize \u00e7\u0131karmak i\u00e7in MongoDB'deki substr i\u015flevinin nas\u0131l kullan\u0131laca\u011f\u0131 \u00f6rneklerle a\u00e7\u0131klanmaktad\u0131r.","og_url":"https:\/\/statorials.org\/tr\/mongodb-alt-dizesi\/","og_site_name":"Statorials","article_published_time":"2023-07-20T20:46:38+00:00","author":"Dr.benjamin anderson","twitter_card":"summary_large_image","twitter_misc":{"Yazan:":"Dr.benjamin anderson","Tahmini okuma s\u00fcresi":"2 dakika"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/statorials.org\/tr\/mongodb-alt-dizesi\/","url":"https:\/\/statorials.org\/tr\/mongodb-alt-dizesi\/","name":"MongoDB: $susbtr i\u015flevi nas\u0131l kullan\u0131l\u0131r - Statorials","isPartOf":{"@id":"https:\/\/statorials.org\/tr\/#website"},"datePublished":"2023-07-20T20:46:38+00:00","dateModified":"2023-07-20T20:46:38+00:00","author":{"@id":"https:\/\/statorials.org\/tr\/#\/schema\/person\/365dc158a39a7c8ae256355451e3de48"},"description":"Bu e\u011fitimde, bir dizeden bir alt dize \u00e7\u0131karmak i\u00e7in MongoDB'deki substr i\u015flevinin nas\u0131l kullan\u0131laca\u011f\u0131 \u00f6rneklerle a\u00e7\u0131klanmaktad\u0131r.","breadcrumb":{"@id":"https:\/\/statorials.org\/tr\/mongodb-alt-dizesi\/#breadcrumb"},"inLanguage":"tr","potentialAction":[{"@type":"ReadAction","target":["https:\/\/statorials.org\/tr\/mongodb-alt-dizesi\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/statorials.org\/tr\/mongodb-alt-dizesi\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Ev","item":"https:\/\/statorials.org\/tr\/"},{"@type":"ListItem","position":2,"name":"Mongodb: $susbtr i\u015flevi nas\u0131l kullan\u0131l\u0131r?"}]},{"@type":"WebSite","@id":"https:\/\/statorials.org\/tr\/#website","url":"https:\/\/statorials.org\/tr\/","name":"Statorials","description":"\u0130statistik okuryazarl\u0131\u011f\u0131 rehberiniz!","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/statorials.org\/tr\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"tr"},{"@type":"Person","@id":"https:\/\/statorials.org\/tr\/#\/schema\/person\/365dc158a39a7c8ae256355451e3de48","name":"Dr.benjamin anderson","image":{"@type":"ImageObject","inLanguage":"tr","@id":"https:\/\/statorials.org\/tr\/#\/schema\/person\/image\/","url":"https:\/\/statorials.org\/tr\/wp-content\/uploads\/2023\/10\/Dr.-Benjamin-Anderson-96x96.jpg","contentUrl":"https:\/\/statorials.org\/tr\/wp-content\/uploads\/2023\/10\/Dr.-Benjamin-Anderson-96x96.jpg","caption":"Dr.benjamin anderson"},"description":"Merhaba, ben Benjamin, emekli bir istatistik profes\u00f6r\u00fc ve Statorials \u00f6\u011fretmenine d\u00f6n\u00fc\u015ft\u00fcm. \u0130statistik alan\u0131ndaki kapsaml\u0131 deneyimim ve uzmanl\u0131\u011f\u0131mla, \u00f6\u011frencilerimi Statorials arac\u0131l\u0131\u011f\u0131yla g\u00fc\u00e7lendirmek i\u00e7in bilgilerimi payla\u015fmaya can at\u0131yorum. Daha fazlas\u0131n\u0131 bil","sameAs":["https:\/\/statorials.org\/tr"]}]}},"yoast_meta":{"yoast_wpseo_title":"","yoast_wpseo_metadesc":"","yoast_wpseo_canonical":""},"_links":{"self":[{"href":"https:\/\/statorials.org\/tr\/wp-json\/wp\/v2\/posts\/2755","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/statorials.org\/tr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/statorials.org\/tr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/statorials.org\/tr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/statorials.org\/tr\/wp-json\/wp\/v2\/comments?post=2755"}],"version-history":[{"count":0,"href":"https:\/\/statorials.org\/tr\/wp-json\/wp\/v2\/posts\/2755\/revisions"}],"wp:attachment":[{"href":"https:\/\/statorials.org\/tr\/wp-json\/wp\/v2\/media?parent=2755"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/statorials.org\/tr\/wp-json\/wp\/v2\/categories?post=2755"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/statorials.org\/tr\/wp-json\/wp\/v2\/tags?post=2755"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}