{"id":26826,"date":"2025-08-01T09:15:23","date_gmt":"2025-08-01T06:15:23","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/postgresqlde-rastgele-tarih-uretme-orneklerle\/"},"modified":"2025-08-01T09:15:23","modified_gmt":"2025-08-01T06:15:23","slug":"postgresqlde-rastgele-tarih-uretme-orneklerle","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/postgresqlde-rastgele-tarih-uretme-orneklerle\/","title":{"rendered":"PostgreSQL&#8217;de Rastgele Tarih \u00dcretme (\u00d6rneklerle)"},"content":{"rendered":"<p># PostgreSQL&#8217;de Rastgele Tarih \u00dcretme: Ad\u0131m Ad\u0131m K\u0131lavuz<\/p>\n<p>PostgreSQL veritaban\u0131n\u0131zda test verileri olu\u015fturman\u0131z m\u0131 gerekiyor?  Ya da bir raporlama arac\u0131 i\u00e7in rastgele tarih aral\u0131klar\u0131na sahip \u00f6rnek veriler mi \u00fcretmek istiyorsunuz?  Bu makalede, PostgreSQL&#8217;de rastgele tarih \u00fcretmenin farkl\u0131 y\u00f6ntemlerini, performans optimizasyonlar\u0131n\u0131 ve ger\u00e7ek d\u00fcnya senaryolar\u0131n\u0131 ele alarak, bu sorulara kapsaml\u0131 cevaplar sunaca\u011f\u0131z.  PostgreSQL&#8217;in g\u00fc\u00e7l\u00fc fonksiyonlar\u0131n\u0131 kullanarak, ihtiyac\u0131n\u0131za uygun rastgele tarih verilerini nas\u0131l etkili bir \u015fekilde olu\u015fturabilece\u011finizi \u00f6\u011freneceksiniz.<\/p>\n<p><strong>\u00d6\u011frenme Yol Haritas\u0131<\/strong><\/p>\n<p>Bu makale, PostgreSQL&#8217;de rastgele tarih \u00fcretmeyi \u00f6\u011frenmek i\u00e7in \u00fc\u00e7 farkl\u0131 seviyeye ayr\u0131lm\u0131\u015ft\u0131r:<\/p>\n<p><strong>Yeni Ba\u015flayan:<\/strong> Temel fonksiyonlar ve basit bir \u00f6rnek \u00fczerinden ad\u0131m ad\u0131m anlat\u0131m.<\/p>\n<p><strong>Orta Seviye:<\/strong> Ger\u00e7ek d\u00fcnya senaryolar\u0131, optimizasyon ipu\u00e7lar\u0131 ve daha karma\u015f\u0131k \u00f6rnekler.<\/p>\n<p><strong>\u0130leri Seviye:<\/strong> Performans analizi, edge case&#8217;ler ve geli\u015fmi\u015f teknikler.<\/p>\n<p><strong>PostgreSQL&#8217;de Tarih ve Zaman Fonksiyonlar\u0131na Giri\u015f<\/strong><\/p>\n<p>PostgreSQL, tarih ve zaman verilerini y\u00f6netmek i\u00e7in g\u00fc\u00e7l\u00fc fonksiyonlar sunar.  Bu fonksiyonlar, <code class=\"language-\">date<\/code>, <code class=\"language-\">timestamp<\/code>, <code class=\"language-\">timestamptz<\/code> gibi veri tipleriyle \u00e7al\u0131\u015f\u0131r.  Rastgele tarih \u00fcretmek i\u00e7in, \u00f6ncelikle bu veri tiplerini ve temel fonksiyonlar\u0131n\u0131 anlamak \u00f6nemlidir.  \u00d6rne\u011fin, <code class=\"language-\">now()<\/code> fonksiyonu \u015fu anki tarihi ve zaman\u0131 d\u00f6nd\u00fcr\u00fcrken, <code class=\"language-\">generate_series()<\/code> fonksiyonu belirli bir aral\u0131kta tarih serileri olu\u015fturmak i\u00e7in kullan\u0131l\u0131r.  Bu fonksiyonlar, rastgele tarih \u00fcretme i\u015flemlerinin temelini olu\u015fturur.  Ayr\u0131ca, <code class=\"language-\">random()<\/code> fonksiyonu, 0 ile 1 aras\u0131nda rastgele bir ondal\u0131k say\u0131 \u00fcretir ve bu say\u0131, tarih aral\u0131klar\u0131n\u0131 belirlemek i\u00e7in kullan\u0131labilir.  <code class=\"language-\">date_part()<\/code> fonksiyonu ise tarih ve zaman verilerinden belirli par\u00e7alar\u0131 (y\u0131l, ay, g\u00fcn vb.) ay\u0131klamam\u0131za olanak tan\u0131r.  Bu fonksiyonlar\u0131n kombinasyonlar\u0131n\u0131 kullanarak, ihtiyac\u0131m\u0131z olan rastgele tarih verilerini elde edebiliriz.<\/p>\n<p><strong>1. Yeni Ba\u015flayanlar \u0130\u00e7in Rastgele Tarih \u00dcretme:  <code class=\"language-\">random()<\/code> ve <code class=\"language-\">date<\/code> Fonksiyonlar\u0131<\/strong><\/p>\n<p>En basit rastgele tarih \u00fcretme y\u00f6ntemi, <code class=\"language-\">random()<\/code> fonksiyonunu kullanarak bir tarih aral\u0131\u011f\u0131 belirlemek ve bu aral\u0131k i\u00e7inde rastgele bir tarih se\u00e7mektir.  \u00d6rne\u011fin, 1 Ocak 2020 ile 31 Aral\u0131k 2023 tarihleri aras\u0131nda rastgele bir tarih \u00fcretmek i\u00e7in a\u015fa\u011f\u0131daki sorguyu kullanabiliriz:<\/p>\n<pre class=\"language-sql\"><code>SELECT date('2020-01-01') + (random() * (julianday('2023-12-31') - julianday('2020-01-01'))) AS rastgele_tarih;<\/code><\/pre>\n<p>Bu sorgu, \u00f6ncelikle ba\u015flang\u0131\u00e7 ve biti\u015f tarihlerinin Julian g\u00fcn say\u0131lar\u0131n\u0131 hesaplar.  Daha sonra, <code class=\"language-\">random()<\/code> fonksiyonu ile 0 ile bu fark aras\u0131nda rastgele bir say\u0131 \u00fcretilir ve bu say\u0131, ba\u015flang\u0131\u00e7 tarihine eklenerek rastgele bir tarih elde edilir.  <code class=\"language-\">date()<\/code> fonksiyonu, sonucu tarih veri tipine d\u00f6n\u00fc\u015ft\u00fcr\u00fcr.<\/p>\n<p><strong>2.  Orta Seviye:  <code class=\"language-\">generate_series()<\/code> ile \u00c7oklu Rastgele Tarih \u00dcretme<\/strong><\/p>\n<p>Tek bir rastgele tarih yerine, belirli bir say\u0131da rastgele tarih \u00fcretmek i\u00e7in <code class=\"language-\">generate_series()<\/code> fonksiyonunu kullanabiliriz.  \u00d6rne\u011fin, 1 Ocak 2022 ile 31 Aral\u0131k 2022 tarihleri aras\u0131nda 10 adet rastgele tarih \u00fcretmek i\u00e7in a\u015fa\u011f\u0131daki sorguyu kullanabiliriz:<\/p>\n<pre class=\"language-sql\"><code>SELECT date('2022-01-01') + (random() * (julianday('2022-12-31') - julianday('2022-01-01'))) AS rastgele_tarih\nFROM generate_series(1, 10);<\/code><\/pre>\n<p><code class=\"language-\">generate_series(1, 10)<\/code> fonksiyonu, 1&#8217;den 10&#8217;a kadar 10 sat\u0131r \u00fcretir ve her sat\u0131r i\u00e7in yukar\u0131daki rastgele tarih \u00fcretme i\u015flemi tekrarlan\u0131r.<\/p>\n<p><strong>3.  Ger\u00e7ek D\u00fcnya \u00d6rne\u011fi:  E-Ticaret Sipari\u015f Tarihleri<\/strong><\/p>\n<p>Bir e-ticaret \u015firketinin veritaban\u0131nda, yeni sipari\u015fler i\u00e7in rastgele tarih \u00fcretmek istedi\u011fimizi d\u00fc\u015f\u00fcnelim.  Sipari\u015flerin belirli bir zaman aral\u0131\u011f\u0131nda yo\u011funla\u015ft\u0131\u011f\u0131n\u0131 varsayal\u0131m.  Bu durumda, basit rastgele tarih \u00fcretme y\u00f6ntemleri yerine, daha geli\u015fmi\u015f bir yakla\u015f\u0131m kullanmam\u0131z gerekebilir.  \u00d6rne\u011fin, belirli g\u00fcnlerde daha fazla sipari\u015f oldu\u011funu sim\u00fcle etmek i\u00e7in, a\u011f\u0131rl\u0131kl\u0131 rastgele tarih \u00fcretme y\u00f6ntemlerini kullanabiliriz.<\/p>\n<p><strong>4.  Performans Optimizasyonu:  \u00d6nceden Hesaplanm\u0131\u015f Tarihler<\/strong><\/p>\n<p>\u00c7ok say\u0131da rastgele tarih \u00fcretmek gerekiyorsa, performans optimizasyonu \u00f6nemlidir.  Bir y\u00f6ntem, belirli bir tarih aral\u0131\u011f\u0131 i\u00e7in rastgele tarihleri \u00f6nceden hesaplay\u0131p bir tabloda saklamakt\u0131r.  Bu, her seferinde rastgele tarih \u00fcretme i\u015flemini tekrarlamaktan daha h\u0131zl\u0131 olacakt\u0131r.  Bu \u00f6nceden hesaplanm\u0131\u015f tarihler, gerekti\u011finde bu tablodan se\u00e7ilebilir.<\/p>\n<p><strong>5. \u0130leri D\u00fczey:  Karma\u015f\u0131k Tarih Da\u011f\u0131l\u0131mlar\u0131 ve Edge Case&#8217;ler<\/strong><\/p>\n<p>Baz\u0131 senaryolarda, rastgele tarihlerin belirli bir da\u011f\u0131l\u0131ma sahip olmas\u0131 gerekebilir.  \u00d6rne\u011fin, normal da\u011f\u0131l\u0131m veya Poisson da\u011f\u0131l\u0131m\u0131 kullanarak, ger\u00e7ek d\u00fcnyadaki veri setlerine daha yak\u0131n sonu\u00e7lar elde edebiliriz.  Bu durumlar i\u00e7in, daha geli\u015fmi\u015f istatistiksel fonksiyonlar ve olas\u0131l\u0131k da\u011f\u0131l\u0131mlar\u0131 kullan\u0131lmas\u0131 gerekebilir.  Ayr\u0131ca, ay\u0131n son g\u00fcn\u00fc veya y\u0131l\u0131n son g\u00fcn\u00fc gibi edge case&#8217;leri de dikkate almak \u00f6nemlidir.<\/p>\n<p><strong>6.  Nas\u0131l Farkl\u0131 Tarih Aral\u0131klar\u0131nda Rastgele Tarihler \u00dcretilir?<\/strong><\/p>\n<p>Farkl\u0131 tarih aral\u0131klar\u0131nda rastgele tarih \u00fcretmek i\u00e7in, <code class=\"language-\">generate_series()<\/code> fonksiyonu ile birlikte <code class=\"language-\">date<\/code> ve <code class=\"language-\">random()<\/code> fonksiyonlar\u0131n\u0131 kullanarak aral\u0131klar\u0131 belirleyebiliriz.  \u00d6rne\u011fin, belirli bir y\u0131l i\u00e7inde rastgele tarihler \u00fcretmek i\u00e7in:<\/p>\n<pre class=\"language-sql\"><code>SELECT date('2024-01-01') + (random() * (julianday('2024-12-31') - julianday('2024-01-01'))) AS rastgele_tarih\nFROM generate_series(1, 100);<\/code><\/pre>\n<p>Bu sorgu, 2024 y\u0131l\u0131 i\u00e7inde 100 adet rastgele tarih \u00fcretir.  Farkl\u0131 y\u0131llar veya aylar i\u00e7in, ba\u015flang\u0131\u00e7 ve biti\u015f tarihlerini de\u011fi\u015ftirerek benzer sorgular olu\u015fturabilirsiniz.<\/p>\n<p><strong>7.  PostgreSQL&#8217;de Rastgele Tarih \u00dcretme: Performans Analizi ve Optimizasyon \u0130pu\u00e7lar\u0131<\/strong><\/p>\n<p>B\u00fcy\u00fck miktarda rastgele tarih \u00fcretme i\u015flemlerinde performans \u00f6nemli bir fakt\u00f6rd\u00fcr.  <code class=\"language-\">generate_series()<\/code> fonksiyonu ile birlikte <code class=\"language-\">random()<\/code> fonksiyonunu kullanmak, performans a\u00e7\u0131s\u0131ndan uygun bir y\u00f6ntemdir.  Ancak, \u00e7ok b\u00fcy\u00fck miktarlarda veri \u00fcretmeniz gerekiyorsa, \u00f6nceden olu\u015fturulmu\u015f bir rastgele tarih tablosundan verileri se\u00e7mek daha h\u0131zl\u0131 olabilir.  Ayr\u0131ca, indeksleme ve sorgular\u0131 optimize etmek de performans\u0131 art\u0131rabilir.  [fatihsoysal.com](https:\/\/fatihsoysal.com) adresindeki blog yaz\u0131lar\u0131mda, PostgreSQL performans optimizasyonu hakk\u0131nda daha fazla bilgi bulabilirsiniz.<\/p>\n<p><strong>Sonu\u00e7<\/strong><\/p>\n<p>Bu makalede, PostgreSQL&#8217;de rastgele tarih \u00fcretmenin farkl\u0131 y\u00f6ntemlerini, ger\u00e7ek d\u00fcnya \u00f6rneklerini ve performans optimizasyonlar\u0131n\u0131 ele ald\u0131k.  Basit \u00f6rneklerden karma\u015f\u0131k da\u011f\u0131l\u0131mlara kadar, \u00e7e\u015fitli senaryolar i\u00e7in \u00e7\u00f6z\u00fcmler sunduk.  Unutmay\u0131n ki, do\u011fru y\u00f6ntem, projenizin \u00f6zel gereksinimlerine ba\u011fl\u0131d\u0131r.  Uygulamada kar\u015f\u0131la\u015faca\u011f\u0131n\u0131z zorluklar i\u00e7in, [fatihsoysal.com](https:\/\/fatihsoysal.com) adresini ziyaret ederek daha fazla bilgi edinebilirsiniz.<\/p>\n<p><strong>S\u0131k\u00e7a Sorulan Sorular:<\/strong><\/p>\n<p>1. <strong>Rastgele tarihler nas\u0131l e\u015fit da\u011f\u0131l\u0131ml\u0131 hale getirilir?<\/strong>  <code class=\"language-\">random()<\/code> fonksiyonu zaten e\u015fit da\u011f\u0131l\u0131ml\u0131 rastgele say\u0131lar \u00fcretir. Ancak, tarih aral\u0131\u011f\u0131n\u0131n uzunlu\u011fu ve da\u011f\u0131l\u0131m\u0131, sonu\u00e7lar\u0131 etkileyebilir.<br \/>\n2. <strong>Belirli bir tarih aral\u0131\u011f\u0131ndan daha fazla rastgele tarih nas\u0131l \u00fcretilir?<\/strong>  <code class=\"language-\">generate_series()<\/code> fonksiyonunda \u00fcretilen sat\u0131r say\u0131s\u0131n\u0131 art\u0131rarak daha fazla rastgele tarih \u00fcretebilirsiniz.<br \/>\n3. <strong>Rastgele tarihlerin belirli bir da\u011f\u0131l\u0131ma sahip olmas\u0131 nas\u0131l sa\u011flan\u0131r?<\/strong>  Daha geli\u015fmi\u015f istatistiksel fonksiyonlar ve olas\u0131l\u0131k da\u011f\u0131l\u0131mlar\u0131 kullanman\u0131z gerekebilir.<br \/>\n4. <strong>\u00c7ok b\u00fcy\u00fck miktarda veri \u00fcretilirken performans nas\u0131l iyile\u015ftirilir?<\/strong>  \u00d6nceden olu\u015fturulmu\u015f bir tablo kullanabilir veya sorgular\u0131 optimize edebilirsiniz.<br \/>\n5. <strong>Rastgele tarih \u00fcretiminde hangi veri tipleri kullan\u0131l\u0131r?<\/strong>  <code class=\"language-\">date<\/code>, <code class=\"language-\">timestamp<\/code> ve <code class=\"language-\">timestamptz<\/code> veri tipleri kullan\u0131labilir.<\/p>\n<p>Yazar: Fatih Soysal<\/p>\n","protected":false},"excerpt":{"rendered":"# PostgreSQL&#8217;de Rastgele Tarih \u00dcretme: Ad\u0131m Ad\u0131m K\u0131lavuz PostgreSQL veritaban\u0131n\u0131zda test verileri olu\u015fturman\u0131z m\u0131 gerekiyor? Ya da bir&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-26826","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 Tarih \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-tarih-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 Tarih \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-tarih-uretme-orneklerle\/\" \/>\n<meta property=\"og:site_name\" content=\"Kodlar\u0131n Gizemli D\u00fcnyas\u0131\" \/>\n<meta property=\"article:published_time\" content=\"2025-08-01T06:15:23+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-tarih-uretme-orneklerle\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/postgresqlde-rastgele-tarih-uretme-orneklerle\/\"},\"author\":{\"name\":\"Fatih Soysal\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"headline\":\"PostgreSQL&#8217;de Rastgele Tarih \u00dcretme (\u00d6rneklerle)\",\"datePublished\":\"2025-08-01T06:15:23+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/postgresqlde-rastgele-tarih-uretme-orneklerle\/\"},\"wordCount\":1056,\"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-tarih-uretme-orneklerle\/#respond\"]}],\"copyrightYear\":\"2025\",\"copyrightHolder\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/postgresqlde-rastgele-tarih-uretme-orneklerle\/\",\"url\":\"https:\/\/fatihsoysal.com\/blog\/postgresqlde-rastgele-tarih-uretme-orneklerle\/\",\"name\":\"PostgreSQL'de Rastgele Tarih \u00dcretme (\u00d6rneklerle)\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#website\"},\"datePublished\":\"2025-08-01T06:15:23+00:00\",\"description\":\"Hi\u00e7bir etiketi bulunamad\u0131.\",\"breadcrumb\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/postgresqlde-rastgele-tarih-uretme-orneklerle\/#breadcrumb\"},\"inLanguage\":\"tr\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/fatihsoysal.com\/blog\/postgresqlde-rastgele-tarih-uretme-orneklerle\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/postgresqlde-rastgele-tarih-uretme-orneklerle\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Anasayfa\",\"item\":\"https:\/\/fatihsoysal.com\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"PostgreSQL&#8217;de Rastgele Tarih \u00dcretme (\u00d6rneklerle)\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#website\",\"url\":\"https:\/\/fatihsoysal.com\/blog\/\",\"name\":\"Fatihsoysal.com\",\"description\":\"Blog - 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