{"id":26299,"date":"2025-07-23T09:15:24","date_gmt":"2025-07-23T06:15:24","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/postgresql-baska-bir-tablodaki-sutunla-sutun-guncellemesi\/"},"modified":"2025-07-23T09:15:24","modified_gmt":"2025-07-23T06:15:24","slug":"postgresql-baska-bir-tablodaki-sutunla-sutun-guncellemesi","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/postgresql-baska-bir-tablodaki-sutunla-sutun-guncellemesi\/","title":{"rendered":"PostgreSQL: Ba\u015fka Bir Tablodaki S\u00fctunla S\u00fctun G\u00fcncellemesi"},"content":{"rendered":"<p># PostgreSQL: Ba\u015fka Tablodaki S\u00fctunla S\u00fctun G\u00fcncelleme<\/p>\n<p>PostgreSQL veritaban\u0131n\u0131zda bir tablodaki s\u00fctunu ba\u015fka bir tablodaki kar\u015f\u0131l\u0131k gelen s\u00fctunla g\u00fcncellemeniz mi gerekiyor? Bu durum, verilerinizi senkronize etmeniz, veri b\u00fct\u00fcnl\u00fc\u011f\u00fcn\u00fc sa\u011flaman\u0131z veya veri aktar\u0131mlar\u0131n\u0131 y\u00f6netmeniz gerekti\u011finde s\u0131k\u00e7a kar\u015f\u0131la\u015fabilece\u011finiz bir senaryodur.  Bu makale, PostgreSQL&#8217;de farkl\u0131 karma\u015f\u0131kl\u0131k seviyelerinde s\u00fctun g\u00fcncelleme i\u015flemlerini ad\u0131m ad\u0131m a\u00e7\u0131klayacak, ger\u00e7ek d\u00fcnya \u00f6rnekleri sunacak ve performans optimizasyonu tekniklerini ele alacakt\u0131r.  \u00d6\u011frenece\u011finiz teknikler, veritaban\u0131 y\u00f6netiminizde \u00f6nemli bir rol oynayacak ve i\u015f ak\u0131\u015f\u0131n\u0131z\u0131 h\u0131zland\u0131racakt\u0131r.<\/p>\n<p><strong>\u00d6\u011frenme Yol Haritas\u0131<\/strong><\/p>\n<p>Bu makale, PostgreSQL&#8217;de ba\u015fka bir tablodaki s\u00fctunla s\u00fctun g\u00fcncelleme i\u015flemini \u00fc\u00e7 seviyede ele almaktad\u0131r:<\/p>\n<p><strong>Yeni Ba\u015flayan:<\/strong>  Temel <code class=\"language-\">UPDATE<\/code> ve <code class=\"language-\">FROM<\/code> c\u00fcmlelerinin kullan\u0131m\u0131, basit bir \u00f6rnek ile ad\u0131m ad\u0131m a\u00e7\u0131klama.<\/p>\n<p><strong>Orta:<\/strong> Ger\u00e7ek d\u00fcnya senaryolar\u0131, JOIN kullan\u0131m\u0131, performans optimizasyonu ipu\u00e7lar\u0131 ve karma\u015f\u0131k sorgular.<\/p>\n<p><strong>\u0130leri D\u00fczey:<\/strong>  Performans analizi, b\u00fcy\u00fck veri k\u00fcmeleri i\u00e7in optimizasyon stratejileri, edge case&#8217;ler ve olas\u0131 sorunlar\u0131n \u00e7\u00f6z\u00fcmleri.<\/p>\n<p><strong>PostgreSQL&#8217;de Temel G\u00fcncelleme \u0130\u015flemleri: Nas\u0131l Yap\u0131l\u0131r?<\/strong><\/p>\n<p>PostgreSQL&#8217;de bir tablodaki s\u00fctunu ba\u015fka bir tablodaki bir s\u00fctunla g\u00fcncellemenin en temel yolu <code class=\"language-\">UPDATE<\/code> ve <code class=\"language-\">FROM<\/code> c\u00fcmlelerini birlikte kullanmakt\u0131r.  Bu y\u00f6ntem, iki tablo aras\u0131nda bir ili\u015fki (genellikle birincil anahtar &#8211; yabanc\u0131 anahtar ili\u015fkisi) gerektirir.<\/p>\n<p><strong>Yeni Ba\u015flayan:<\/strong><\/p>\n<p>\u00d6rne\u011fin, <code class=\"language-\">musteriler<\/code> adl\u0131 bir tablomuz ve <code class=\"language-\">siparisler<\/code> adl\u0131 bir tablomuz olsun.  <code class=\"language-\">musteriler<\/code> tablosunda <code class=\"language-\">musteri_adi<\/code> ve <code class=\"language-\">sehir<\/code> s\u00fctunlar\u0131, <code class=\"language-\">siparisler<\/code> tablosunda ise <code class=\"language-\">musteri_id<\/code> (musteriler tablosuna yabanc\u0131 anahtar), <code class=\"language-\">siparis_tutari<\/code> ve <code class=\"language-\">musteri_sehir<\/code> s\u00fctunlar\u0131 bulunmaktad\u0131r.  <code class=\"language-\">musteriler<\/code> tablosundaki <code class=\"language-\">sehir<\/code> s\u00fctununu <code class=\"language-\">siparisler<\/code> tablosundaki <code class=\"language-\">musteri_sehir<\/code> s\u00fctunuyla g\u00fcncellemek i\u00e7in a\u015fa\u011f\u0131daki sorguyu kullanabiliriz:<\/p>\n<pre class=\"language-sql\"><code>UPDATE musteriler\nSET sehir = siparisler.musteri_sehir\nFROM siparisler\nWHERE musteriler.musteri_id = siparisler.musteri_id;<\/code><\/pre>\n<p>Bu sorgu, <code class=\"language-\">musteriler<\/code> tablosundaki her sat\u0131r\u0131, <code class=\"language-\">siparisler<\/code> tablosundaki kar\u015f\u0131l\u0131k gelen sat\u0131rla e\u015fle\u015ftirir ( <code class=\"language-\">musteri_id<\/code> \u00fczerinden) ve <code class=\"language-\">sehir<\/code> s\u00fctununu <code class=\"language-\">musteri_sehir<\/code> s\u00fctunuyla g\u00fcnceller.<\/p>\n<p><strong>Orta:<\/strong><\/p>\n<p>\u015eimdi daha ger\u00e7ek\u00e7i bir senaryo ele alal\u0131m. Bir e-ticaret sitesinin \u00fcr\u00fcn kategorilerini g\u00fcncellememiz gerekiyor. <code class=\"language-\">urunler<\/code> ve <code class=\"language-\">kategoriler<\/code> tablolar\u0131m\u0131z olsun. <code class=\"language-\">urunler<\/code> tablosunda <code class=\"language-\">urun_id<\/code>, <code class=\"language-\">kategori_id<\/code> ve <code class=\"language-\">kategori_adi<\/code> s\u00fctunlar\u0131 bulunurken, <code class=\"language-\">kategoriler<\/code> tablosunda <code class=\"language-\">kategori_id<\/code> ve <code class=\"language-\">yeni_kategori_adi<\/code> s\u00fctunlar\u0131 bulunmaktad\u0131r.  <code class=\"language-\">urunler<\/code> tablosundaki <code class=\"language-\">kategori_adi<\/code> s\u00fctununu <code class=\"language-\">kategoriler<\/code> tablosundaki <code class=\"language-\">yeni_kategori_adi<\/code> ile g\u00fcncelleyelim:<\/p>\n<pre class=\"language-sql\"><code>UPDATE urunler\nSET kategori_adi = k.yeni_kategori_adi\nFROM kategoriler k\nWHERE urunler.kategori_id = k.kategori_id;<\/code><\/pre>\n<p>Bu \u00f6rnekte, <code class=\"language-\">FROM<\/code> c\u00fcmlesinde bir takma ad (<code class=\"language-\">k<\/code>) kulland\u0131k. Bu, sorgunun okunabilirli\u011fini art\u0131r\u0131r ve b\u00fcy\u00fck sorgularda hata yapma riskini azalt\u0131r.<\/p>\n<p><strong>JOIN Kullan\u0131m\u0131 ve Performans Optimizasyonu: Nas\u0131l Yap\u0131l\u0131r?<\/strong><\/p>\n<p>Yukar\u0131daki \u00f6rneklerde kullan\u0131lan <code class=\"language-\">FROM<\/code> c\u00fcmlesi asl\u0131nda bir <code class=\"language-\">INNER JOIN<\/code> i\u015flemini ger\u00e7ekle\u015ftirir.  Daha karma\u015f\u0131k senaryolarda, <code class=\"language-\">LEFT JOIN<\/code>, <code class=\"language-\">RIGHT JOIN<\/code> veya <code class=\"language-\">FULL OUTER JOIN<\/code> gibi farkl\u0131 JOIN t\u00fcrlerini kullanman\u0131z gerekebilir.  \u00d6rne\u011fin, <code class=\"language-\">urunler<\/code> tablosunda olmayan bir <code class=\"language-\">kategori_id<\/code> ile g\u00fcncelleme yapmamak i\u00e7in <code class=\"language-\">LEFT JOIN<\/code> kullanabiliriz.<\/p>\n<p><strong>Orta:<\/strong>  B\u00fcy\u00fck veri k\u00fcmeleri i\u00e7in performans\u0131 art\u0131rmak i\u00e7in a\u015fa\u011f\u0131daki ipu\u00e7lar\u0131n\u0131 kullanabilirsiniz:<\/p>\n<p>* <strong>\u0130ndeksler:<\/strong>  <code class=\"language-\">musteri_id<\/code> ve <code class=\"language-\">kategori_id<\/code> gibi s\u0131k\u00e7a kullan\u0131lan s\u00fctunlara indeks eklemek sorgu performans\u0131n\u0131 \u00f6nemli \u00f6l\u00e7\u00fcde art\u0131rabilir.<br \/>\n* <strong>WHERE ko\u015fulu:<\/strong>  <code class=\"language-\">WHERE<\/code> c\u00fcmlesini m\u00fcmk\u00fcn oldu\u011funca spesifik hale getirerek g\u00fcncellenecek sat\u0131r say\u0131s\u0131n\u0131 azalt\u0131n.<br \/>\n* <strong>\u0130\u015flem Boyutu:<\/strong> \u00c7ok b\u00fcy\u00fck veri k\u00fcmeleri i\u00e7in i\u015flemi par\u00e7alara ay\u0131rmak (\u00f6rne\u011fin, <code class=\"language-\">LIMIT<\/code> ve <code class=\"language-\">OFFSET<\/code> kullanarak) daha iyi performans sa\u011flayabilir.  Bu, \u00f6zellikle g\u00fcncelleme i\u015fleminin uzun s\u00fcrmesi durumunda veritaban\u0131 sunucusunun kaynaklar\u0131n\u0131 daha verimli kullanman\u0131za yard\u0131mc\u0131 olur.<br \/>\n* <strong>Analiz:<\/strong> <code class=\"language-\">EXPLAIN ANALYZE<\/code> komutu ile sorgunuzun performans\u0131n\u0131 analiz edin ve iyile\u015ftirme alanlar\u0131n\u0131 belirleyin.<\/p>\n<p><strong>Ger\u00e7ek D\u00fcnya Senaryolar\u0131 ve Vaka Analizleri<\/strong><\/p>\n<p><strong>Orta:<\/strong>  Bir online al\u0131\u015fveri\u015f sitesinin m\u00fc\u015fteri adres bilgilerini g\u00fcncellemesi gerekti\u011fini d\u00fc\u015f\u00fcnelim.  M\u00fc\u015fteri adresleri ayr\u0131 bir tablodaki g\u00fcncel verilere g\u00f6re g\u00fcncellenmelidir. Bu durumda, <code class=\"language-\">UPDATE<\/code> ve <code class=\"language-\">FROM<\/code> c\u00fcmlelerini kullanarak verileri do\u011fru ve verimli bir \u015fekilde g\u00fcncelleyebiliriz.  Bu i\u015flem, veritaban\u0131 b\u00fct\u00fcnl\u00fc\u011f\u00fcn\u00fc sa\u011flamak ve m\u00fc\u015fterilere do\u011fru adres bilgileriyle hizmet vermek i\u00e7in hayati \u00f6nem ta\u015f\u0131r.<\/p>\n<p><strong>\u0130leri D\u00fczey:<\/strong>  Bir \u015firketin, farkl\u0131 kaynaklardan gelen verileri birle\u015ftirerek m\u00fc\u015fteri profillerini g\u00fcncellemesi gerekti\u011fini d\u00fc\u015f\u00fcnelim.  Bu senaryoda, farkl\u0131 tablolar aras\u0131nda birden fazla JOIN kullan\u0131lmas\u0131 ve veri temizli\u011fi i\u015flemleri gerekebilir.  Bu durum, edge case&#8217;leri ve veri tutars\u0131zl\u0131klar\u0131n\u0131 ele almay\u0131 gerektirir.  \u00d6rne\u011fin, bir m\u00fc\u015fteri i\u00e7in birden fazla kay\u0131t varsa, hangi kayd\u0131n kullan\u0131laca\u011f\u0131na karar vermek i\u00e7in bir kural belirlemeniz gerekebilir.<\/p>\n<p><strong>B\u00fcy\u00fck Veri K\u00fcmeleri ve Performans Analizi: Nas\u0131l Yap\u0131l\u0131r?<\/strong><\/p>\n<p><strong>\u0130leri D\u00fczey:<\/strong>  Milyonlarca sat\u0131r\u0131 i\u00e7eren b\u00fcy\u00fck tablolarla \u00e7al\u0131\u015f\u0131rken, performans optimizasyonu kritik \u00f6nem ta\u015f\u0131r.  <code class=\"language-\">UPDATE<\/code> sorgular\u0131n\u0131n performans\u0131n\u0131 analiz etmek i\u00e7in <code class=\"language-\">EXPLAIN ANALYZE<\/code> komutunu kullanabilirsiniz.  Bu komut, sorgunun y\u00fcr\u00fct\u00fclme plan\u0131n\u0131 g\u00f6sterir ve hangi i\u015flemlerin en fazla zaman ald\u0131\u011f\u0131n\u0131 belirlemenize yard\u0131mc\u0131 olur.<\/p>\n<p><strong>\u0130leri D\u00fczey:<\/strong>  B\u00fcy\u00fck veri k\u00fcmeleri i\u00e7in, g\u00fcncelleme i\u015flemini par\u00e7alara ay\u0131rmak (\u00f6rne\u011fin, belirli bir say\u0131da sat\u0131r\u0131 g\u00fcncellemek ve sonraki bir ad\u0131mda geri kalan sat\u0131rlar\u0131 g\u00fcncellemek) performans\u0131 art\u0131rabilir.  Bu, veritaban\u0131 sunucusunun kaynaklar\u0131n\u0131 daha verimli kullanman\u0131za yard\u0131mc\u0131 olur.<\/p>\n<p><strong>PostgreSQL S\u00fctun G\u00fcncelleme \u0130\u015flemlerinde S\u0131k\u00e7a Sorulan Sorular (SSS)<\/strong><\/p>\n<p>1. <strong><code class=\"language-\">UPDATE<\/code> sorgusunda hata al\u0131rsam ne yapmal\u0131y\u0131m?<\/strong> Hata mesaj\u0131n\u0131 dikkatlice inceleyin ve hatan\u0131n nedenini belirleyin.  Sorgunuzda yaz\u0131m hatas\u0131 olabilir veya tablo yap\u0131n\u0131zda bir sorun olabilir.  Hata mesaj\u0131 size yard\u0131mc\u0131 olmazsa, sorguyu ad\u0131m ad\u0131m test edin ve hatan\u0131n hangi b\u00f6l\u00fcmde oldu\u011funu bulun.<\/p>\n<p>2. <strong><code class=\"language-\">UPDATE<\/code> sorgusu \u00e7ok uzun s\u00fcr\u00fcyorsa ne yapmal\u0131y\u0131m?<\/strong>  Performans optimizasyonu tekniklerini uygulay\u0131n (indeksler, <code class=\"language-\">WHERE<\/code> ko\u015fulu, i\u015flem boyutu).  <code class=\"language-\">EXPLAIN ANALYZE<\/code> komutunu kullanarak sorgunuzun performans\u0131n\u0131 analiz edin.<\/p>\n<p>3. <strong>Birden fazla tablodaki s\u00fctunlar\u0131 ayn\u0131 anda g\u00fcncelleyebilir miyim?<\/strong> Evet, birden fazla <code class=\"language-\">UPDATE<\/code> sorgusunu bir i\u015flem i\u00e7inde kullanarak veya daha karma\u015f\u0131k sorgular yazarak bunu yapabilirsiniz. Ancak, dikkatlice planlama ve test yapman\u0131z \u00f6nemlidir.<\/p>\n<p>4. <strong><code class=\"language-\">UPDATE<\/code> sorgusu verileri yanl\u0131\u015f g\u00fcncelliyor ise ne yapmal\u0131y\u0131m?<\/strong> Sorgunuzu dikkatlice inceleyin ve <code class=\"language-\">WHERE<\/code> ko\u015fulunu do\u011fru \u015fekilde yazd\u0131\u011f\u0131n\u0131zdan emin olun.  Test ortam\u0131nda sorgunuzu \u00e7al\u0131\u015ft\u0131r\u0131n ve sonu\u00e7lar\u0131 dikkatlice kontrol edin.<\/p>\n<p>5. <strong>G\u00fcncelleme i\u015flemini geri alabilir miyim?<\/strong> Evet, <code class=\"language-\">ROLLBACK<\/code> komutunu kullanarak g\u00fcncelleme i\u015flemini geri alabilirsiniz. Ancak, bu i\u015flem sadece i\u015flem tamamlanmadan \u00f6nce m\u00fcmk\u00fcnd\u00fcr.  \u0130\u015flemin tamamlanmas\u0131ndan sonra, veritaban\u0131 yedeklemesini kullanarak verileri geri y\u00fcklemeniz gerekebilir.<\/p>\n<p><strong>Sonu\u00e7<\/strong><\/p>\n<p>Bu makalede, PostgreSQL&#8217;de ba\u015fka bir tablodaki s\u00fctunla s\u00fctun g\u00fcncelleme i\u015flemlerini ad\u0131m ad\u0131m a\u00e7\u0131klad\u0131k, ger\u00e7ek d\u00fcnya \u00f6rnekleri sunduk ve performans optimizasyonu tekniklerini ele ald\u0131k.  Farkl\u0131 karma\u015f\u0131kl\u0131k seviyelerindeki senaryolar\u0131 inceleyerek, veritaban\u0131 y\u00f6netiminizde bu \u00f6nemli i\u015flemi g\u00fcvenle ve verimli bir \u015fekilde ger\u00e7ekle\u015ftirebilirsiniz.  Unutmay\u0131n ki, b\u00fcy\u00fck veri k\u00fcmeleri i\u00e7in performans optimizasyonu kritik \u00f6neme sahiptir ve <code class=\"language-\">EXPLAIN ANALYZE<\/code> komutu bu konuda size b\u00fcy\u00fck yard\u0131mc\u0131 olacakt\u0131r. Daha fazla PostgreSQL ipucu ve teknikleri i\u00e7in [fatihsoysal.com](https:\/\/fatihsoysal.com) adresini ziyaret edebilirsiniz.<\/p>\n<p>Yazar: Fatih Soysal<\/p>\n","protected":false},"excerpt":{"rendered":"# PostgreSQL: Ba\u015fka Tablodaki S\u00fctunla S\u00fctun G\u00fcncelleme PostgreSQL veritaban\u0131n\u0131zda bir tablodaki s\u00fctunu ba\u015fka bir tablodaki kar\u015f\u0131l\u0131k gelen s\u00fctunla&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-26299","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) - 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