{"id":27915,"date":"2025-08-20T18:17:43","date_gmt":"2025-08-20T15:17:43","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/postgresql-calculate-timestamp-difference-in-milliseconds-ceviri\/"},"modified":"2025-08-20T18:17:43","modified_gmt":"2025-08-20T15:17:43","slug":"postgresql-calculate-timestamp-difference-in-milliseconds-ceviri","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/postgresql-calculate-timestamp-difference-in-milliseconds-ceviri\/","title":{"rendered":"PostgreSQL: Calculate Timestamp Difference in Milliseconds (\u00c7eviri)"},"content":{"rendered":"<p># PostgreSQL&#8217;de Zaman Damgas\u0131 Fark\u0131n\u0131 Milisaniye Cinsinden Hesaplama<\/p>\n<p>PostgreSQL veritaban\u0131n\u0131zda zamanlanm\u0131\u015f olaylar aras\u0131ndaki s\u00fcreyi milisaniye hassasiyetinde hesaplaman\u0131z m\u0131 gerekiyor?  Bir e-ticaret platformunda sipari\u015f i\u015fleme s\u00fcrelerini analiz etmek, bir oyun sunucusunda kullan\u0131c\u0131 tepki s\u00fcrelerini \u00f6l\u00e7mek veya bir IoT cihaz\u0131ndan gelen verileri i\u015flemek gibi bir\u00e7ok senaryoda bu ihtiyac\u0131 kar\u015f\u0131lamak hayati \u00f6nem ta\u015f\u0131r. Bu makalede, PostgreSQL&#8217;de zaman damgas\u0131 farklar\u0131n\u0131 milisaniye cinsinden hesaplaman\u0131n farkl\u0131 yollar\u0131n\u0131, performans optimizasyon tekniklerini ve ger\u00e7ek d\u00fcnya \u00f6rneklerini ad\u0131m ad\u0131m ele alaca\u011f\u0131z.  Bu rehber, yeni ba\u015flayanlardan uzmanlara kadar herkes i\u00e7in faydal\u0131 bilgiler sunmaktad\u0131r.<\/p>\n<p><strong>PostgreSQL Zaman Damgas\u0131 \u0130\u015flemleri: Temel Kavramlar<\/strong><\/p>\n<p>PostgreSQL, zaman ve tarih verilerini saklamak ve i\u015flemek i\u00e7in g\u00fc\u00e7l\u00fc fonksiyonlar sunar.  <code class=\"language-\">timestamp<\/code> ve <code class=\"language-\">timestamptz<\/code> veri tipleri, s\u0131ras\u0131yla zaman dilimi bilgisi i\u00e7ermeyen ve i\u00e7eren zaman damgalar\u0131n\u0131 temsil eder. Bu veri tipleri \u00fczerinde aritmetik i\u015flemler yapabilir ve zaman farklar\u0131n\u0131 hesaplayabilirsiniz.  Ancak, PostgreSQL&#8217;in varsay\u0131lan fonksiyonlar\u0131 milisaniye hassasiyetinde sonu\u00e7 \u00fcretmez.  Bu nedenle, milisaniye hassasiyetine ula\u015fmak i\u00e7in ekstra ad\u0131mlar atmam\u0131z gerekir.  <code class=\"language-\">EXTRACT<\/code> fonksiyonu ile saniyeleri elde edip, sonucu 1000 ile \u00e7arparak milisaniye elde edebiliriz.  Ancak, daha efektif ve okunabilir y\u00f6ntemler mevcuttur.<\/p>\n<p><strong>PostgreSQL&#8217;de Zaman Fark\u0131n\u0131 Milisaniye Cinsinden Hesaplama: Ad\u0131m Ad\u0131m Uygulama<\/strong><\/p>\n<p><strong>\u00d6\u011frenme Yol Haritas\u0131:<\/strong><\/p>\n<p><strong>Yeni Ba\u015flayan:<\/strong><\/p>\n<p><strong>Ad\u0131m 1:<\/strong> \u0130ki <code class=\"language-\">timestamp<\/code> de\u011ferini \u00e7\u0131kararak saniye cinsinden fark\u0131 hesaplay\u0131n.<\/p>\n<pre class=\"language-sql\"><code>SELECT (timestamp '2024-10-27 10:00:00' - timestamp '2024-10-27 09:59:55') AS fark_saniye;<\/code><\/pre>\n<p><strong>Ad\u0131m 2:<\/strong> Saniye cinsinden fark\u0131 1000 ile \u00e7arparak milisaniye cinsinden fark\u0131 hesaplay\u0131n.<\/p>\n<pre class=\"language-sql\"><code>SELECT ((timestamp '2024-10-27 10:00:00' - timestamp '2024-10-27 09:59:55') * 1000) AS fark_milisaniye;<\/code><\/pre>\n<p><strong>Ad\u0131m 3:<\/strong>  <code class=\"language-\">EXTRACT<\/code> fonksiyonunu kullanarak daha detayl\u0131 bir hesaplama yap\u0131n (saniye, milisaniye).  Bu y\u00f6ntem, daha karma\u015f\u0131k zaman dilimlerini de do\u011fru bir \u015fekilde i\u015fler.<\/p>\n<pre class=\"language-sql\"><code>SELECT EXTRACT(EPOCH FROM (timestamp '2024-10-27 10:00:00' - timestamp '2024-10-27 09:59:55')) * 1000 AS fark_milisaniye;<\/code><\/pre>\n<p><strong>Orta Seviye:<\/strong><\/p>\n<p><strong>Ger\u00e7ek Hayat \u00d6rne\u011fi:<\/strong> Bir e-ticaret sitesindeki sipari\u015flerin i\u015flenme s\u00fcrelerini hesaplayal\u0131m.  <code class=\"language-\">orders<\/code> tablomuzda <code class=\"language-\">order_placed_at<\/code> ve <code class=\"language-\">order_shipped_at<\/code> s\u00fctunlar\u0131 olsun.<\/p>\n<pre class=\"language-sql\"><code>SELECT \n    order_id,\n    (EXTRACT(EPOCH FROM (order_shipped_at - order_placed_at)) * 1000) AS islenme_suresi_milisaniye\nFROM orders;<\/code><\/pre>\n<p><strong>Optimizasyon \u0130pu\u00e7lar\u0131:<\/strong>  B\u00fcy\u00fck veri k\u00fcmeleri i\u00e7in,  <code class=\"language-\">EXTRACT(EPOCH FROM ...)<\/code>  fonksiyonunun performans\u0131n\u0131 art\u0131rmak i\u00e7in indeksleme kullan\u0131n. <code class=\"language-\">order_placed_at<\/code> ve <code class=\"language-\">order_shipped_at<\/code> s\u00fctunlar\u0131na indeks eklemek sorgulama h\u0131z\u0131n\u0131 \u00f6nemli \u00f6l\u00e7\u00fcde iyile\u015ftirecektir.<\/p>\n<p><strong>\u0130leri Seviye:<\/strong><\/p>\n<p><strong>Performans Analizi:<\/strong>  \u00c7ok b\u00fcy\u00fck veri k\u00fcmeleri \u00fczerinde \u00e7al\u0131\u015f\u0131rken,  <code class=\"language-\">EXTRACT(EPOCH FROM ...)<\/code>  fonksiyonunun performans\u0131n\u0131 analiz etmek \u00f6nemlidir.  <code class=\"language-\">EXPLAIN ANALYZE<\/code> komutu ile sorgulaman\u0131n y\u00fcr\u00fctme plan\u0131n\u0131 ve s\u00fcresini inceleyebilirsiniz.  Gerekirse,  PostgreSQL&#8217;in  <code class=\"language-\">pg_stat_statements<\/code> uzant\u0131s\u0131 ile sorgulamalar\u0131n performans\u0131n\u0131 izleyebilirsiniz.  Bu uzant\u0131, en yava\u015f sorgulamalar\u0131 tespit etmenize ve optimizasyon yapman\u0131za yard\u0131mc\u0131 olur.<\/p>\n<p><strong>Edge Case&#8217;ler:<\/strong>  Zaman dilimlerinin farkl\u0131 oldu\u011fu durumlarda, <code class=\"language-\">timestamptz<\/code> veri tipinin kullan\u0131lmas\u0131 ve zaman dilimi farklar\u0131n\u0131n do\u011fru bir \u015fekilde hesaplanmas\u0131 \u00f6nemlidir.  <code class=\"language-\">AT TIME ZONE<\/code> fonksiyonu ile zaman dilimlerini d\u00f6n\u00fc\u015ft\u00fcrebilirsiniz.<\/p>\n<p><strong>PostgreSQL&#8217;de Zaman Fark\u0131 Hesaplama: Vaka Analizleri<\/strong><\/p>\n<p><strong>Vaka 1:  Web Sunucu Yan\u0131t S\u00fcreleri:<\/strong> Bir web sunucusunun yan\u0131t s\u00fcrelerini analiz etmek i\u00e7in, her istek i\u00e7in ba\u015flang\u0131\u00e7 ve biti\u015f zamanlar\u0131n\u0131 kaydeden bir tablo olu\u015fturabiliriz.  Bu tabloda,  <code class=\"language-\">EXTRACT(EPOCH FROM ...)<\/code> fonksiyonunu kullanarak her istek i\u00e7in yan\u0131t s\u00fcresini milisaniye cinsinden hesaplayabiliriz.  Bu verileri daha sonra grafiksel olarak temsil ederek sunucunun performans\u0131n\u0131 analiz edebiliriz.<\/p>\n<p><strong>Vaka 2:  Oyun Sunucusu Tepki S\u00fcreleri:<\/strong>  \u00c7ok oyunculu bir oyunda, oyuncular\u0131n sunucuya g\u00f6nderdikleri komutlar\u0131n yan\u0131t s\u00fcrelerini \u00f6l\u00e7mek \u00f6nemlidir.  Her komut i\u00e7in g\u00f6nderim ve al\u0131m zamanlar\u0131n\u0131 kaydederek,  <code class=\"language-\">EXTRACT(EPOCH FROM ...)<\/code> fonksiyonunu kullanarak tepki s\u00fcrelerini milisaniye cinsinden hesaplayabiliriz. Bu verileri kullanarak oyunun performans\u0131n\u0131 iyile\u015ftirmek i\u00e7in ad\u0131mlar atabiliriz.<\/p>\n<p><strong>Vaka 3:  End\u00fcstriyel IoT Cihazlar\u0131ndan Veri Analizi:<\/strong> Bir\u00e7ok sens\u00f6rden veri toplayan bir end\u00fcstriyel IoT sisteminde, her sens\u00f6rden gelen verilerin zaman damgalar\u0131n\u0131 kaydeder ve aralar\u0131ndaki zaman farklar\u0131n\u0131 analiz ederek, sistemdeki gecikmeleri tespit edebiliriz.  Bu, sistem performans\u0131n\u0131 iyile\u015ftirmek ve olas\u0131 sorunlar\u0131 \u00f6nlemek i\u00e7in hayati \u00f6nem ta\u015f\u0131r.<\/p>\n<p><strong>Sonu\u00e7<\/strong><\/p>\n<p>PostgreSQL&#8217;de zaman damgas\u0131 farklar\u0131n\u0131 milisaniye cinsinden hesaplamak,  <code class=\"language-\">EXTRACT(EPOCH FROM ...)<\/code> fonksiyonu ve uygun indeksleme stratejileriyle etkili bir \u015fekilde yap\u0131labilir. Bu makalede ele ald\u0131\u011f\u0131m\u0131z y\u00f6ntemler ve ger\u00e7ek d\u00fcnya \u00f6rnekleri, PostgreSQL&#8217;i kullanan uygulamalar\u0131n\u0131zda zaman tabanl\u0131 analizler yapman\u0131za yard\u0131mc\u0131 olacakt\u0131r.  Performans optimizasyonu i\u00e7in  <code class=\"language-\">EXPLAIN ANALYZE<\/code> komutunu ve <code class=\"language-\">pg_stat_statements<\/code> uzant\u0131s\u0131n\u0131 kullanmay\u0131 unutmay\u0131n. Daha detayl\u0131 PostgreSQL bilgisi i\u00e7in [fatihsoysal.com](https:\/\/fatihsoysal.com) sitesini ziyaret edebilirsiniz.<\/p>\n<p><strong>S\u0131k\u00e7a Sorulan Sorular:<\/strong><\/p>\n<p>1. <strong><code class=\"language-\">timestamp<\/code> ve <code class=\"language-\">timestamptz<\/code> aras\u0131ndaki fark nedir?<\/strong> <code class=\"language-\">timestamp<\/code>, zaman dilimi bilgisi i\u00e7ermezken, <code class=\"language-\">timestamptz<\/code> zaman dilimi bilgisini i\u00e7erir.  Zaman dilimi hassasiyeti gerekti\u011finde <code class=\"language-\">timestamptz<\/code> kullan\u0131lmal\u0131d\u0131r.<\/p>\n<p>2. <strong>B\u00fcy\u00fck veri k\u00fcmeleri i\u00e7in performans\u0131 nas\u0131l iyile\u015ftirebilirim?<\/strong>  <code class=\"language-\">order_placed_at<\/code> ve <code class=\"language-\">order_shipped_at<\/code> gibi s\u00fctunlara indeks eklemek sorgulama performans\u0131n\u0131 \u00f6nemli \u00f6l\u00e7\u00fcde iyile\u015ftirir.<\/p>\n<p>3. <strong>Zaman dilimi d\u00f6n\u00fc\u015f\u00fcmleri nas\u0131l yap\u0131l\u0131r?<\/strong> <code class=\"language-\">AT TIME ZONE<\/code> fonksiyonu ile zaman dilimlerini d\u00f6n\u00fc\u015ft\u00fcrebilirsiniz.<\/p>\n<p>4. <strong>Milisaniye hassasiyetinden daha y\u00fcksek hassasiyete nas\u0131l ula\u015fabilirim?<\/strong> PostgreSQL varsay\u0131lan olarak milisaniyeden daha y\u00fcksek hassasiyet sunmaz.  Daha y\u00fcksek hassasiyet gerekti\u011finde, farkl\u0131 bir veri tipi veya yakla\u015f\u0131m kullanman\u0131z gerekebilir.<\/p>\n<p>5.  <strong>PostgreSQL&#8217;de zamanla ilgili daha fazla bilgi nerede bulabilirim?<\/strong> PostgreSQL resmi dok\u00fcmanlar\u0131na ve [fatihsoysal.com](https:\/\/fatihsoysal.com) gibi kaynaklara bakabilirsiniz.<\/p>\n<p>Yazar: Fatih Soysal<\/p>\n","protected":false},"excerpt":{"rendered":"# PostgreSQL&#8217;de Zaman Damgas\u0131 Fark\u0131n\u0131 Milisaniye Cinsinden Hesaplama PostgreSQL veritaban\u0131n\u0131zda zamanlanm\u0131\u015f olaylar aras\u0131ndaki s\u00fcreyi milisaniye hassasiyetinde hesaplaman\u0131z m\u0131&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-27915","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: Calculate Timestamp Difference in Milliseconds (\u00c7eviri)<\/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\" 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