{"id":26834,"date":"2025-08-01T12:15:24","date_gmt":"2025-08-01T09:15:24","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/postgresqlde-rastgele-tam-sayi-uretme-orneklerle\/"},"modified":"2025-08-01T12:15:24","modified_gmt":"2025-08-01T09:15:24","slug":"postgresqlde-rastgele-tam-sayi-uretme-orneklerle","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/postgresqlde-rastgele-tam-sayi-uretme-orneklerle\/","title":{"rendered":"PostgreSQL&#8217;de Rastgele Tam Say\u0131 \u00dcretme (\u00d6rneklerle)"},"content":{"rendered":"<p># PostgreSQL&#8217;de Rastgele Tam Say\u0131 \u00dcretme: Ad\u0131m Ad\u0131m K\u0131lavuz<\/p>\n<p>PostgreSQL veritaban\u0131n\u0131zda rastgele veriler \u00fcretmeniz mi gerekiyor?  \u00d6rne\u011fin, test verileri olu\u015fturmak, sim\u00fclasyonlar \u00e7al\u0131\u015ft\u0131rmak veya veri analizi i\u00e7in sentetik veriler olu\u015fturmak isteyebilirsiniz.  Bu makalede, PostgreSQL&#8217;de rastgele tam say\u0131lar \u00fcretmenin farkl\u0131 y\u00f6ntemlerini, performans optimizasyonunu ve ger\u00e7ek d\u00fcnya senaryolar\u0131n\u0131 ad\u0131m ad\u0131m ele alaca\u011f\u0131z.  PostgreSQL&#8217;in g\u00fc\u00e7l\u00fc fonksiyonlar\u0131n\u0131 kullanarak rastgele say\u0131 \u00fcretimini nas\u0131l kontrol edebilece\u011finizi ve olas\u0131 zorluklar\u0131 nas\u0131l a\u015fabilece\u011finizi \u00f6\u011freneceksiniz.<\/p>\n<p><strong>\u00d6\u011frenme Yol Haritas\u0131<\/strong><\/p>\n<p>Bu makale, PostgreSQL&#8217;de rastgele tam say\u0131 \u00fcretmeyi \u00f6\u011frenme yolculu\u011funuzu \u00fc\u00e7 a\u015famada ele almaktad\u0131r:<\/p>\n<p><strong>Yeni Ba\u015flayan:<\/strong> Temel fonksiyonlar ve basit \u00f6rneklerle ba\u015flayaca\u011f\u0131z.<\/p>\n<p><strong>Orta Seviye:<\/strong> Ger\u00e7ek d\u00fcnya senaryolar\u0131 ve optimizasyon tekniklerini inceleyece\u011fiz.<\/p>\n<p><strong>\u0130leri Seviye:<\/strong> Performans analizi ve nadir kar\u015f\u0131la\u015f\u0131lan durumlar (edge case&#8217;ler) \u00fczerinde duraca\u011f\u0131z.<\/p>\n<p><strong>PostgreSQL&#8217;de Rastgele Say\u0131 \u00dcretmenin Temelleri: <code class=\"language-\">random()<\/code> Fonksiyonu<\/strong><\/p>\n<p>PostgreSQL, rastgele say\u0131 \u00fcretmek i\u00e7in <code class=\"language-\">random()<\/code> fonksiyonunu sunar. Bu fonksiyon, 0 ile 1 aras\u0131nda (0 dahil, 1 hari\u00e7) bir ondal\u0131k say\u0131 d\u00f6nd\u00fcr\u00fcr.  Ancak, tam say\u0131 \u00fcretmek i\u00e7in bu fonksiyonu biraz daha i\u015flememiz gerekiyor.  Yeni ba\u015flayanlar i\u00e7in, basit bir \u00f6rnek:<\/p>\n<pre class=\"language-sql\"><code>SELECT random();<\/code><\/pre>\n<p>Bu sorgu, 0 ile 1 aras\u0131nda bir ondal\u0131k say\u0131 d\u00f6nd\u00fcrecektir.  Tam say\u0131 \u00fcretmek i\u00e7in ise, bu say\u0131y\u0131 arzu etti\u011fimiz aral\u0131kla \u00e7arp\u0131p yuvarlamam\u0131z gerekir.  \u00d6rne\u011fin, 1 ile 10 aras\u0131nda bir rastgele tam say\u0131 \u00fcretmek i\u00e7in:<\/p>\n<pre class=\"language-sql\"><code>SELECT floor(random() * 10) + 1;<\/code><\/pre>\n<p>Burada <code class=\"language-\">floor()<\/code> fonksiyonu, ondal\u0131k say\u0131y\u0131 a\u015fa\u011f\u0131ya yuvarlar.  <code class=\"language-\">random() * 10<\/code> ifadesi 0 ile 10 aras\u0131nda (0 dahil, 10 hari\u00e7) bir ondal\u0131k say\u0131 \u00fcretir ve <code class=\"language-\">+ 1<\/code> ekleyerek 1 ile 10 aras\u0131nda (1 dahil, 10 dahil) bir tam say\u0131 elde ederiz.<\/p>\n<p><strong>1 ile 100 Aras\u0131nda Rastgele Tam Say\u0131 \u00dcretme: Uygulamada Basit \u00d6rnekler<\/strong><\/p>\n<p>Yukar\u0131daki \u00f6rne\u011fi geni\u015fleterek, 1 ile 100 aras\u0131nda rastgele tam say\u0131lar \u00fcretelim.  A\u015fa\u011f\u0131daki SQL sorgusu, 10 adet rastgele tam say\u0131 \u00fcretecektir:<\/p>\n<pre class=\"language-sql\"><code>SELECT floor(random() * 100) + 1 FROM generate_series(1, 10);<\/code><\/pre>\n<p><code class=\"language-\">generate_series(1, 10)<\/code> fonksiyonu, 1&#8217;den 10&#8217;a kadar bir say\u0131 dizisi olu\u015fturur.  Bu dizi, <code class=\"language-\">random()<\/code> fonksiyonunun 10 kez \u00e7al\u0131\u015ft\u0131r\u0131lmas\u0131n\u0131 sa\u011flar ve her seferinde farkl\u0131 bir rastgele say\u0131 \u00fcretir.  Bu basit \u00f6rnek, yeni ba\u015flayanlar i\u00e7in PostgreSQL&#8217;de rastgele say\u0131 \u00fcretmenin temel mant\u0131\u011f\u0131n\u0131 kavramak i\u00e7in idealdir.<\/p>\n<p><strong>Ger\u00e7ek D\u00fcnya Senaryolar\u0131: Rastgele Veri \u00dcretimi ve Optimizasyon \u0130pu\u00e7lar\u0131<\/strong><\/p>\n<p>Rastgele veri \u00fcretme, \u00f6zellikle test veritabanlar\u0131 olu\u015fturmak veya veri analizi i\u00e7in sentetik veriler olu\u015fturmak istedi\u011finizde olduk\u00e7a faydal\u0131d\u0131r.  \u00d6rne\u011fin, bir e-ticaret uygulamas\u0131 i\u00e7in test verileri olu\u015fturmak istedi\u011finizi d\u00fc\u015f\u00fcnelim.  \u00dcr\u00fcn fiyatlar\u0131, m\u00fc\u015fteri ya\u015flar\u0131 ve sipari\u015f tarihleri gibi verileri rastgele \u00fcretmeniz gerekebilir.<\/p>\n<pre class=\"language-sql\"><code>-- 10 adet rastgele \u00fcr\u00fcn fiyat\u0131 (10 ile 1000 TL aras\u0131nda)\nSELECT floor(random() * 991) + 10 AS fiyat FROM generate_series(1, 10);\n\n-- 5 adet rastgele m\u00fc\u015fteri ya\u015f\u0131 (18 ile 65 ya\u015f aras\u0131nda)\nSELECT floor(random() * 48) + 18 AS yas FROM generate_series(1, 5);<\/code><\/pre>\n<p>Bu \u00f6rneklerde, <code class=\"language-\">random()<\/code> fonksiyonunu farkl\u0131 aral\u0131klarla kullanarak farkl\u0131 t\u00fcrdeki rastgele verileri \u00fcrettik.  Ancak, b\u00fcy\u00fck miktarda veri \u00fcretmek istedi\u011finizde, performans optimizasyonu \u00f6nemlidir.  B\u00fcy\u00fck veri k\u00fcmeleri i\u00e7in <code class=\"language-\">generate_series()<\/code> fonksiyonunu kullanmak yerine, daha verimli y\u00f6ntemler ara\u015ft\u0131rman\u0131z gerekebilir.  \u00d6rne\u011fin,  PostgreSQL&#8217;in sundu\u011fu di\u011fer fonksiyonlar\u0131 veya \u00f6zel fonksiyonlar yazmay\u0131 d\u00fc\u015f\u00fcnebilirsiniz.  Ayr\u0131ca, <code class=\"language-\">random()<\/code> fonksiyonunun her \u00e7a\u011fr\u0131ld\u0131\u011f\u0131nda yeni bir rastgele say\u0131 \u00fcretti\u011fini unutmay\u0131n.  Performans\u0131 art\u0131rmak i\u00e7in \u00f6nceden belirlenmi\u015f bir rastgele say\u0131 dizisi kullanmay\u0131 d\u00fc\u015f\u00fcnebilirsiniz.<\/p>\n<p><strong>\u0130leri D\u00fczey Teknikler:  Tohum De\u011feri (Seed) Kullan\u0131m\u0131 ve Performans Analizi<\/strong><\/p>\n<p><code class=\"language-\">random()<\/code> fonksiyonu, her \u00e7al\u0131\u015ft\u0131r\u0131ld\u0131\u011f\u0131nda farkl\u0131 bir rastgele say\u0131 dizisi \u00fcretir.  Ancak, ayn\u0131 rastgele say\u0131 dizisini tekrar \u00fcretmek isteyebilirsiniz.  Bu durumda, <code class=\"language-\">setseed()<\/code> fonksiyonunu kullanarak bir tohum de\u011feri (seed) belirleyebilirsiniz.  Tohum de\u011feri, rastgele say\u0131 \u00fcretecinin ba\u015flang\u0131\u00e7 noktas\u0131n\u0131 belirler.  Ayn\u0131 tohum de\u011feriyle <code class=\"language-\">random()<\/code> fonksiyonunu \u00e7al\u0131\u015ft\u0131rd\u0131\u011f\u0131n\u0131zda, ayn\u0131 rastgele say\u0131 dizisini elde edersiniz.<\/p>\n<pre class=\"language-sql\"><code>SET seed = 123; -- Tohum de\u011ferini 123 olarak ayarl\u0131yoruz.\nSELECT floor(random() * 100) + 1; -- 1 ile 100 aras\u0131nda rastgele say\u0131 \u00fcretiyoruz.<\/code><\/pre>\n<p>Bu kod blo\u011fu her \u00e7al\u0131\u015ft\u0131r\u0131ld\u0131\u011f\u0131nda ayn\u0131 rastgele say\u0131y\u0131 \u00fcretecektir.  B\u00fcy\u00fck veri setlerinde performans analizi i\u00e7in, farkl\u0131 y\u00f6ntemlerin \u00e7al\u0131\u015fma s\u00fcrelerini kar\u015f\u0131la\u015ft\u0131rabilir ve en verimli y\u00f6ntemi se\u00e7ebilirsiniz. <code class=\"language-\">EXPLAIN ANALYZE<\/code> komutu ile sorgular\u0131n\u0131z\u0131n performans\u0131n\u0131 detayl\u0131 olarak inceleyebilirsiniz.<\/p>\n<p><strong>PostgreSQL&#8217;de Rastgele Veri \u00dcretimi i\u00e7in \u00d6zel Fonksiyonlar<\/strong><\/p>\n<p>Karma\u015f\u0131k rastgele veri \u00fcretim senaryolar\u0131 i\u00e7in, kendi \u00f6zel fonksiyonlar\u0131n\u0131z\u0131 yazabilirsiniz.  \u00d6rne\u011fin, belirli bir olas\u0131l\u0131k da\u011f\u0131l\u0131m\u0131na g\u00f6re rastgele say\u0131lar \u00fcreten bir fonksiyon yazabilirsiniz. Bu, daha ger\u00e7ek\u00e7i ve spesifik ihtiya\u00e7lara cevap veren rastgele veriler \u00fcretmenizi sa\u011flar.  Bu fonksiyonlar\u0131 olu\u015ftururken PL\/pgSQL gibi procedural dilleri kullanabilirsiniz.<\/p>\n<p><strong>Rastgele Say\u0131 \u00dcretiminde Kar\u015f\u0131la\u015f\u0131labilecek Sorunlar ve \u00c7\u00f6z\u00fcmler (Edge Case&#8217;ler)<\/strong><\/p>\n<p>Rastgele say\u0131 \u00fcretiminde, \u00f6zellikle b\u00fcy\u00fck veri setlerinde, baz\u0131 sorunlarla kar\u015f\u0131la\u015fabilirsiniz.  \u00d6rne\u011fin, rastgele say\u0131 \u00fcretecinin \u00f6ng\u00f6r\u00fclebilir bir \u015fekilde davranmas\u0131 veya belirli say\u0131lar\u0131n daha s\u0131k ortaya \u00e7\u0131kmas\u0131 gibi durumlar ya\u015fanabilir.  Bu gibi durumlar\u0131 \u00f6nlemek i\u00e7in, uygun tohum de\u011ferleri se\u00e7mek ve rastgele say\u0131 \u00fcretecinin kalitesini kontrol etmek \u00f6nemlidir.  Ayr\u0131ca, b\u00fcy\u00fck veri setleri i\u00e7in daha verimli algoritmalar kullanman\u0131z gerekebilir.  <code class=\"language-\">random()<\/code> fonksiyonunun s\u0131n\u0131rlamalar\u0131n\u0131 anlamak ve alternatif y\u00f6ntemleri ara\u015ft\u0131rmak, olas\u0131 sorunlar\u0131 \u00f6nlemenize yard\u0131mc\u0131 olacakt\u0131r.<\/p>\n<p><strong>Sonu\u00e7<\/strong><\/p>\n<p>PostgreSQL&#8217;de rastgele tam say\u0131 \u00fcretme, \u00e7e\u015fitli uygulamalar i\u00e7in olduk\u00e7a kullan\u0131\u015fl\u0131 bir yetenektir.  Bu makalede, temel fonksiyonlardan ileri d\u00fczey tekniklere kadar geni\u015f bir yelpazede konuyu ele ald\u0131k.  Ger\u00e7ek d\u00fcnya \u00f6rnekleri ve performans optimizasyonu ipu\u00e7lar\u0131 ile, PostgreSQL&#8217;de rastgele veri \u00fcretimini daha etkin bir \u015fekilde y\u00f6netmenize yard\u0131mc\u0131 olmay\u0131 ama\u00e7lad\u0131k.  Unutmay\u0131n ki, do\u011fru y\u00f6ntemi se\u00e7mek, projenizin \u00f6zel gereksinimlerine ve veri setinin b\u00fcy\u00fckl\u00fc\u011f\u00fcne ba\u011fl\u0131d\u0131r.<\/p>\n<p><strong>S\u0131k\u00e7a Sorulan Sorular:<\/strong><\/p>\n<p>1. <strong>PostgreSQL&#8217;de ba\u015fka hangi rastgele say\u0131 \u00fcretme y\u00f6ntemleri mevcuttur?<\/strong>  Daha geli\u015fmi\u015f olas\u0131l\u0131k da\u011f\u0131l\u0131mlar\u0131na ihtiya\u00e7 duydu\u011funuzda, \u00f6zel PL\/pgSQL fonksiyonlar\u0131 veya \u00fc\u00e7\u00fcnc\u00fc taraf uzant\u0131lar\u0131 kullanabilirsiniz.<\/p>\n<p>2. <strong>Rastgele say\u0131 \u00fcretiminin performans\u0131n\u0131 nas\u0131l optimize edebilirim?<\/strong>  B\u00fcy\u00fck veri setleri i\u00e7in, <code class=\"language-\">generate_series()<\/code> yerine daha verimli y\u00f6ntemler, \u00f6nceden olu\u015fturulmu\u015f bir rastgele say\u0131 dizisi veya optimize edilmi\u015f \u00f6zel fonksiyonlar kullan\u0131n.<\/p>\n<p>3. <strong>Ayn\u0131 rastgele say\u0131 dizisini nas\u0131l tekrar \u00fcretebilirim?<\/strong>  <code class=\"language-\">setseed()<\/code> fonksiyonu ile bir tohum de\u011feri belirleyerek ayn\u0131 rastgele say\u0131 dizisini tekrar \u00fcretebilirsiniz.<\/p>\n<p>4. <strong>Rastgele say\u0131 \u00fcretiminde \u00f6ng\u00f6r\u00fclebilirlik sorunuyla nas\u0131l ba\u015fa \u00e7\u0131kabilirim?<\/strong>  Y\u00fcksek kaliteli bir rastgele say\u0131 \u00fcreteci kullan\u0131n ve tohum de\u011ferini dikkatlice se\u00e7in.<\/p>\n<p>5. <strong>Rastgele say\u0131 \u00fcretiminde hangi olas\u0131l\u0131k da\u011f\u0131l\u0131mlar\u0131n\u0131 kullanabilirim?<\/strong>  PostgreSQL&#8217;in temel fonksiyonlar\u0131 genellikle d\u00fczg\u00fcn da\u011f\u0131l\u0131m sa\u011flar.  Di\u011fer da\u011f\u0131l\u0131mlar i\u00e7in, \u00f6zel fonksiyonlar veya uzant\u0131lar kullanman\u0131z gerekebilir.  Daha detayl\u0131 bilgi i\u00e7in [fatihsoysal.com](https:\/\/fatihsoysal.com) adresini ziyaret edebilirsiniz.<\/p>\n<p>Yazar: Fatih Soysal<\/p>\n","protected":false},"excerpt":{"rendered":"# PostgreSQL&#8217;de Rastgele Tam Say\u0131 \u00dcretme: Ad\u0131m Ad\u0131m K\u0131lavuz PostgreSQL veritaban\u0131n\u0131zda rastgele veriler \u00fcretmeniz mi gerekiyor? \u00d6rne\u011fin, test&hellip;","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"csco_page_header_type":"","csco_page_load_nextpost":"","csco_page_subscribe_form":"","csco_page_contact_form":"","footnotes":""},"categories":[644],"tags":[],"class_list":{"0":"post-26834","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-postgresql","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.5 (Yoast SEO v25.3.1) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>PostgreSQL&#039;de Rastgele Tam Say\u0131 \u00dcretme (\u00d6rneklerle)<\/title>\n<meta name=\"description\" content=\"Hi\u00e7bir etiketi bulunamad\u0131.\" \/>\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\/postgresqlde-rastgele-tam-sayi-uretme-orneklerle\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PostgreSQL&#039;de Rastgele Tam Say\u0131 \u00dcretme (\u00d6rneklerle)\" \/>\n<meta property=\"og:description\" content=\"Hi\u00e7bir etiketi bulunamad\u0131.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/fatihsoysal.com\/blog\/postgresqlde-rastgele-tam-sayi-uretme-orneklerle\/\" \/>\n<meta property=\"og:site_name\" content=\"Kodlar\u0131n Gizemli D\u00fcnyas\u0131\" \/>\n<meta property=\"article:published_time\" content=\"2025-08-01T09:15:24+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=\"6 dakika\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/postgresqlde-rastgele-tam-sayi-uretme-orneklerle\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/postgresqlde-rastgele-tam-sayi-uretme-orneklerle\/\"},\"author\":{\"name\":\"Fatih Soysal\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"headline\":\"PostgreSQL&#8217;de Rastgele Tam Say\u0131 \u00dcretme (\u00d6rneklerle)\",\"datePublished\":\"2025-08-01T09:15:24+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/postgresqlde-rastgele-tam-sayi-uretme-orneklerle\/\"},\"wordCount\":1073,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"articleSection\":[\"PostgreSQL\"],\"inLanguage\":\"tr\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/fatihsoysal.com\/blog\/postgresqlde-rastgele-tam-sayi-uretme-orneklerle\/#respond\"]}],\"copyrightYear\":\"2025\",\"copyrightHolder\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/postgresqlde-rastgele-tam-sayi-uretme-orneklerle\/\",\"url\":\"https:\/\/fatihsoysal.com\/blog\/postgresqlde-rastgele-tam-sayi-uretme-orneklerle\/\",\"name\":\"PostgreSQL'de Rastgele Tam Say\u0131 \u00dcretme (\u00d6rneklerle)\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#website\"},\"datePublished\":\"2025-08-01T09:15:24+00:00\",\"description\":\"Hi\u00e7bir etiketi bulunamad\u0131.\",\"breadcrumb\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/postgresqlde-rastgele-tam-sayi-uretme-orneklerle\/#breadcrumb\"},\"inLanguage\":\"tr\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/fatihsoysal.com\/blog\/postgresqlde-rastgele-tam-sayi-uretme-orneklerle\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/postgresqlde-rastgele-tam-sayi-uretme-orneklerle\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Anasayfa\",\"item\":\"https:\/\/fatihsoysal.com\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"PostgreSQL&#8217;de Rastgele Tam Say\u0131 \u00dcretme (\u00d6rneklerle)\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#website\",\"url\":\"https:\/\/fatihsoysal.com\/blog\/\",\"name\":\"Fatihsoysal.com\",\"description\":\"Blog - 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