{"id":8575,"date":"2025-01-04T07:00:16","date_gmt":"2025-01-04T04:00:16","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/yinelenen-degerleri-kaldirma-tam-bir-rehber\/"},"modified":"2025-01-04T07:00:16","modified_gmt":"2025-01-04T04:00:16","slug":"yinelenen-degerleri-kaldirma-tam-bir-rehber","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/yinelenen-degerleri-kaldirma-tam-bir-rehber\/","title":{"rendered":"Yinelenen De\u011ferleri Kald\u0131rma: Tam Bir Rehber"},"content":{"rendered":"

<\/p>\n

Yinelenen De\u011ferleri Kald\u0131rma: Tam Bir Rehber<\/p>\n

Veri temizli\u011fi, her veri bilimcisinin ve yaz\u0131l\u0131m geli\u015ftiricisinin kar\u015f\u0131la\u015ft\u0131\u011f\u0131 \u00f6nemli bir g\u00f6revdir. Veri setlerimizde s\u0131k s\u0131k yinelenen de\u011ferler ile kar\u015f\u0131la\u015f\u0131r\u0131z. Bu yinelenen de\u011ferler, analizlerimizin do\u011frulu\u011funu etkileyebilir ve yanl\u0131\u015f sonu\u00e7lara yol a\u00e7abilir. Bu nedenle, yinelenen de\u011ferleri tespit edip kald\u0131rmak olduk\u00e7a \u00f6nemlidir. Bu makalede, farkl\u0131 programlama dillerinde ve veritabanlar\u0131nda yinelenen de\u011ferleri kald\u0131rman\u0131n \u00e7e\u015fitli y\u00f6ntemlerini ele alaca\u011f\u0131z. \u00d6ncelikle, problemimizi daha iyi anlamak i\u00e7in bir \u00f6rnek \u00fczerinde \u00e7al\u0131\u015fal\u0131m.<\/p>\n

Yinelenen De\u011ferler Problemi ve \u00d6rnek<\/h2>\n

\u00d6rne\u011fin, bir m\u00fc\u015fteri veritaban\u0131n\u0131z oldu\u011funu ve baz\u0131 m\u00fc\u015fterilerin kay\u0131tlar\u0131n\u0131n birden fazla kez yer ald\u0131\u011f\u0131n\u0131 varsayal\u0131m. Bu durum, pazarlama kampanyalar\u0131n\u0131z\u0131n verimlili\u011fini etkileyebilir veya yanl\u0131\u015f raporlamaya neden olabilir. Bu t\u00fcr bir problemi \u00e7\u00f6zmek i\u00e7in, yinelenen de\u011ferleri etkili bir \u015fekilde tespit edip kald\u0131rmal\u0131y\u0131z. Neyse ki, bu i\u015flemi farkl\u0131 y\u00f6ntemlerle ger\u00e7ekle\u015ftirebiliriz.<\/p>\n

Python ile Yinelenen De\u011ferleri Kald\u0131rma<\/h2>\n

Python, veri i\u015flemede yayg\u0131n olarak kullan\u0131lan g\u00fc\u00e7l\u00fc bir dildir. Python’da yinelenen de\u011ferleri kald\u0131rmak i\u00e7in \u00e7e\u015fitli y\u00f6ntemler mevcuttur. Bunlardan en yayg\u0131n olanlar\u0131 setler ve pandas k\u00fct\u00fcphanesini kullanmakt\u0131r. Setler, kendili\u011finden benzersiz de\u011ferler i\u00e7eren yap\u0131lard\u0131r. Dolay\u0131s\u0131yla, bir listeyi sete d\u00f6n\u00fc\u015ft\u00fcrerek kolayca yinelenen de\u011ferleri kald\u0131rabiliriz.<\/p>\n

\nliste = [1, 2, 2, 3, 4, 4, 5]\nbenzersiz_liste = list(set(liste))\nprint(benzersiz_liste)  # \u00c7\u0131kt\u0131: [1, 2, 3, 4, 5]\n<\/code><\/pre>\n
Pandas k\u00fct\u00fcphanesi ise daha b\u00fcy\u00fck veri setleriyle \u00e7al\u0131\u015fmak i\u00e7in idealdir.  Pandas’\u0131n drop_duplicates()<\/code> fonksiyonu, yinelenen sat\u0131rlar\u0131 kolayca kald\u0131rabilir.  Ayr\u0131nt\u0131l\u0131 kullan\u0131m i\u00e7in pandas d\u00f6k\u00fcmanlar\u0131n\u0131 inceleyebilirsiniz.<\/p>\n
JavaScript ile Yinelenen De\u011ferleri Kald\u0131rma<\/h2>\n
JavaScript, web geli\u015ftirmede s\u0131k\u00e7a kullan\u0131lan bir dildir.  JavaScript’te yinelenen de\u011ferleri kald\u0131rmak i\u00e7in \u00e7e\u015fitli y\u00f6ntemler vard\u0131r. Bunlardan biri, filter()<\/code> metodu ile benzersiz de\u011ferleri filtrelemektir.<\/p>\n
\nlet dizi = [1, 2, 2, 3, 4, 4, 5];\nlet benzersizDizi = dizi.filter((item, index) => dizi.indexOf(item) === index);\nconsole.log(benzersizDizi); \/\/ \u00c7\u0131kt\u0131: [1, 2, 3, 4, 5]\n<\/code><\/pre>\n
Bu y\u00f6ntem, dizinin her \u00f6\u011fesinin ilk g\u00f6r\u00fcn\u00fcm\u00fcn\u00fc koruyarak yinelenenleri kald\u0131r\u0131r.  Daha geli\u015fmi\u015f senaryolar i\u00e7in, JavaScript’in di\u011fer fonksiyonlar\u0131n\u0131 kullanabilirsiniz.<\/p>\n
SQL ile Yinelenen De\u011ferleri Kald\u0131rma<\/h2>\n
Veritabanlar\u0131nda yinelenen de\u011ferlerle ba\u015fa \u00e7\u0131kmak i\u00e7in SQL kullanabiliriz.  SQL’de,  ROW_NUMBER()<\/code> ve PARTITION BY<\/code> gibi fonksiyonlar\u0131 kullanarak yinelenen sat\u0131rlar\u0131 tespit edebilir ve DELETE<\/code> komutu ile silebiliriz.  Bu i\u015flemin veritaban\u0131n\u0131z\u0131n yap\u0131s\u0131na g\u00f6re \u00f6zelle\u015ftirilmesi gerekebilir.<\/p>\n
\u00d6rne\u011fin,  bir “m\u00fc\u015fteriler” tablosunda yinelenen kay\u0131tlar\u0131 silmek i\u00e7in a\u015fa\u011f\u0131daki SQL sorgusunu kullanabilirsiniz:<\/p>\n
\nDELETE FROM musteriler\nWHERE rowid NOT IN (SELECT MIN(rowid) FROM musteriler GROUP BY musteri_id);\n<\/code><\/pre>\n
Bu sorgu, her m\u00fc\u015fteri i\u00e7in en d\u00fc\u015f\u00fck rowid’li sat\u0131r\u0131 koruyarak di\u011fer yinelenen kay\u0131tlar\u0131 siler.  Dikkatli bir \u015fekilde kullanman\u0131z gereken bu sorgular\u0131 uygulamadan \u00f6nce mutlaka yedekleme yapmal\u0131s\u0131n\u0131z. Daha fazla bilgi i\u00e7in W3Schools SQL DELETE Referans\u0131na<\/a> bakabilirsiniz.<\/p>\n
Sonu\u00e7<\/h2>\n
Yinelenen de\u011ferleri kald\u0131rmak, veri temizli\u011fi s\u00fcrecinin \u00f6nemli bir par\u00e7as\u0131d\u0131r.  Bu makalede, Python, JavaScript ve SQL kullanarak yinelenen de\u011ferleri nas\u0131l kald\u0131raca\u011f\u0131n\u0131z\u0131 \u00f6\u011frendiniz.  Hangi y\u00f6ntemi se\u00e7meniz gerekti\u011fi, kulland\u0131\u011f\u0131n\u0131z programlama diline, veri setinizin b\u00fcy\u00fckl\u00fc\u011f\u00fcne ve veritaban\u0131 yap\u0131n\u0131za ba\u011fl\u0131d\u0131r.  Unutmay\u0131n, veri temizli\u011fi, do\u011fru ve g\u00fcvenilir sonu\u00e7lar elde etmek i\u00e7in hayati \u00f6nem ta\u015f\u0131r.  Daha fazla veri analizi ve temizli\u011fi  ile ilgili bilgiye  fatihsoysal.com<\/a> adresinden ula\u015fabilirsiniz.<\/p>\n
#Etiketler: yinelenen de\u011ferler, duplicate value, veri temizli\u011fi, data cleaning, python, javascript, sql, veri analizi, data analysis, fatihsoysal<\/p>\n
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Veri setlerimizde s\u0131k s\u0131k yinelenen de\u011ferler ile kar\u015f\u0131la\u015f\u0131r\u0131z. Bu yinelenen de\u011ferler, analizlerimizin do\u011frulu\u011funu etkileyebilir ve yanl\u0131\u015f sonu\u00e7lara yol a\u00e7abilir. Bu nedenle, yinelenen de\u011ferleri tespit edip kald\u0131rmak olduk\u00e7a \u00f6nemlidir. Bu makalede, farkl\u0131 programlama dillerinde ve veritabanlar\u0131nda yinelenen de\u011ferleri kald\u0131rman\u0131n \u00e7e\u015fitli y\u00f6ntemlerini ele alaca\u011f\u0131z. \u00d6ncelikle, problemimizi daha iyi anlamak i\u00e7in bir \u00f6rnek \u00fczerinde \u00e7al\u0131\u015fal\u0131m.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/fatihsoysal.com\/blog\/yinelenen-degerleri-kaldirma-tam-bir-rehber\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Yinelenen De\u011ferleri Kald\u0131rma: Tam Bir Rehber\" \/>\n<meta property=\"og:description\" content=\"Veri temizli\u011fi, her veri bilimcisinin ve yaz\u0131l\u0131m geli\u015ftiricisinin kar\u015f\u0131la\u015ft\u0131\u011f\u0131 \u00f6nemli bir g\u00f6revdir. Veri setlerimizde s\u0131k s\u0131k yinelenen de\u011ferler ile kar\u015f\u0131la\u015f\u0131r\u0131z. Bu yinelenen de\u011ferler, analizlerimizin do\u011frulu\u011funu etkileyebilir ve yanl\u0131\u015f sonu\u00e7lara yol a\u00e7abilir. Bu nedenle, yinelenen de\u011ferleri tespit edip kald\u0131rmak olduk\u00e7a \u00f6nemlidir. Bu makalede, farkl\u0131 programlama dillerinde ve veritabanlar\u0131nda yinelenen de\u011ferleri kald\u0131rman\u0131n \u00e7e\u015fitli y\u00f6ntemlerini ele alaca\u011f\u0131z. \u00d6ncelikle, problemimizi daha iyi anlamak i\u00e7in bir \u00f6rnek \u00fczerinde \u00e7al\u0131\u015fal\u0131m.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/fatihsoysal.com\/blog\/yinelenen-degerleri-kaldirma-tam-bir-rehber\/\" \/>\n<meta property=\"og:site_name\" content=\"Kodlar\u0131n Gizemli D\u00fcnyas\u0131\" \/>\n<meta property=\"article:published_time\" content=\"2025-01-04T04:00:16+00:00\" \/>\n<meta name=\"author\" content=\"Fatih Soysal\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Yazan:\" \/>\n\t<meta name=\"twitter:data1\" content=\"Fatih Soysal\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tahmini okuma s\u00fcresi\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 dakika\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/yinelenen-degerleri-kaldirma-tam-bir-rehber\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/yinelenen-degerleri-kaldirma-tam-bir-rehber\/\"},\"author\":{\"name\":\"Fatih Soysal\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"headline\":\"Yinelenen De\u011ferleri Kald\u0131rma: Tam Bir Rehber\",\"datePublished\":\"2025-01-04T04:00:16+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/yinelenen-degerleri-kaldirma-tam-bir-rehber\/\"},\"wordCount\":603,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"inLanguage\":\"tr\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/fatihsoysal.com\/blog\/yinelenen-degerleri-kaldirma-tam-bir-rehber\/#respond\"]}],\"copyrightYear\":\"2025\",\"copyrightHolder\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/yinelenen-degerleri-kaldirma-tam-bir-rehber\/\",\"url\":\"https:\/\/fatihsoysal.com\/blog\/yinelenen-degerleri-kaldirma-tam-bir-rehber\/\",\"name\":\"Yinelenen De\u011ferleri Kald\u0131rma: Tam Bir Rehber\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#website\"},\"datePublished\":\"2025-01-04T04:00:16+00:00\",\"description\":\"Veri temizli\u011fi, her veri bilimcisinin ve yaz\u0131l\u0131m geli\u015ftiricisinin kar\u015f\u0131la\u015ft\u0131\u011f\u0131 \u00f6nemli bir g\u00f6revdir. 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