{"id":25683,"date":"2025-07-11T15:15:24","date_gmt":"2025-07-11T12:15:24","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/postgresql-birden-cok-tabloda-left-join-kullanimi\/"},"modified":"2025-07-11T15:15:24","modified_gmt":"2025-07-11T12:15:24","slug":"postgresql-birden-cok-tabloda-left-join-kullanimi","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/postgresql-birden-cok-tabloda-left-join-kullanimi\/","title":{"rendered":"PostgreSQL: Birden \u00c7ok Tabloda LEFT JOIN Kullan\u0131m\u0131"},"content":{"rendered":"<p># PostgreSQL&#8217;de \u00c7oklu Tablo LEFT JOIN Nas\u0131l Kullan\u0131l\u0131r?<\/p>\n<p>PostgreSQL veritaban\u0131n\u0131zda birden fazla tablodan veri \u00e7ekmeye mi \u00e7al\u0131\u015f\u0131yorsunuz?  Karma\u015f\u0131k sorgular yazmak zorunda kalmadan, verilerinizi etkili bir \u015fekilde birle\u015ftirmenin en yayg\u0131n ve g\u00fc\u00e7l\u00fc yolu <code class=\"language-\">LEFT JOIN<\/code> kullanmakt\u0131r. Bu makale, PostgreSQL&#8217;de \u00e7oklu tablo <code class=\"language-\">LEFT JOIN<\/code> kullan\u0131m\u0131n\u0131, ad\u0131m ad\u0131m a\u00e7\u0131klamalarla, ger\u00e7ek d\u00fcnya \u00f6rnekleriyle ve performans optimizasyon ipu\u00e7lar\u0131yla ele alacakt\u0131r.  Yeni ba\u015flayanlardan ileri seviye kullan\u0131c\u0131lara kadar herkesin faydalanabilece\u011fi kapsaml\u0131 bir rehber sunuyoruz.<\/p>\n<p><strong>\u00d6\u011frenme Yol Haritas\u0131:<\/strong><\/p>\n<p>* <strong>Yeni Ba\u015flayan:<\/strong> Temel <code class=\"language-\">LEFT JOIN<\/code> kavramlar\u0131, basit \u00f6rnekler ve ad\u0131m ad\u0131m a\u00e7\u0131klamalar.<br \/>\n* <strong>Orta Seviye:<\/strong> Ger\u00e7ek d\u00fcnya senaryolar\u0131, karma\u015f\u0131k <code class=\"language-\">LEFT JOIN<\/code> sorgular\u0131 ve optimizasyon teknikleri.<br \/>\n* <strong>\u0130leri Seviye:<\/strong> Performans analizi, karma\u015f\u0131k sorgular\u0131n optimizasyonu ve nadir g\u00f6r\u00fclen durumlar\u0131n ele al\u0131nmas\u0131.<\/p>\n<p><strong>PostgreSQL&#8217;de LEFT JOIN Nedir?<\/strong><\/p>\n<p>Bir <code class=\"language-\">LEFT JOIN<\/code> i\u015flemi, iki veya daha fazla tabloyu birle\u015ftirerek, sol taraftaki tablodaki t\u00fcm sat\u0131rlar\u0131 ve sa\u011f taraftaki tablodaki e\u015fle\u015fen sat\u0131rlar\u0131 d\u00f6nd\u00fcr\u00fcr.  E\u011fer sa\u011f taraftaki tabloda e\u015fle\u015fen bir sat\u0131r yoksa, sol taraftaki tablodaki sat\u0131r yine de d\u00f6nd\u00fcr\u00fcl\u00fcr, ancak sa\u011f taraftaki tablolardan gelen s\u00fctunlar <code class=\"language-\">NULL<\/code> de\u011ferleriyle doldurulur.  Bu, sol taraftaki tablodaki t\u00fcm verileri koruyarak, sa\u011f taraftaki tablolardaki ek bilgileri eklemek istedi\u011finiz durumlarda son derece faydal\u0131d\u0131r.<\/p>\n<p><strong>\u00c7oklu Tablo LEFT JOIN&#8217;i Anlamak<\/strong><\/p>\n<p>Tek bir <code class=\"language-\">LEFT JOIN<\/code> kullanmak nispeten basittir. Ancak, \u00fc\u00e7 veya daha fazla tabloyu birle\u015ftirmek istedi\u011finizde, i\u015fler biraz daha karma\u015f\u0131kla\u015fabilir.  \u00c7oklu tablo <code class=\"language-\">LEFT JOIN<\/code> i\u015flemleri, her bir <code class=\"language-\">JOIN<\/code> i\u015flemini s\u0131rayla uygulayarak \u00e7al\u0131\u015f\u0131r.  \u00d6nemli olan, <code class=\"language-\">JOIN<\/code> ko\u015fullar\u0131n\u0131 do\u011fru bir \u015fekilde belirlemek ve istenen sonucu elde etmek i\u00e7in sorgunuzu dikkatlice yap\u0131land\u0131rmakt\u0131r. Yanl\u0131\u015f bir yap\u0131land\u0131rma, istenmeyen sonu\u00e7lara veya performans sorunlar\u0131na yol a\u00e7abilir.<\/p>\n<p><strong>\u00c7oklu Tablo LEFT JOIN&#8217;i Nas\u0131l Yap\u0131l\u0131r? (Ad\u0131m Ad\u0131m)<\/strong><\/p>\n<p>\u00d6ncelikle, basit bir \u00f6rnek ile ba\u015flayal\u0131m. \u00dc\u00e7 tablo oldu\u011funu varsayal\u0131m: <code class=\"language-\">musteriler<\/code>, <code class=\"language-\">siparisler<\/code> ve <code class=\"language-\">urunler<\/code>.  <code class=\"language-\">musteriler<\/code> tablosunda m\u00fc\u015fteri bilgileri, <code class=\"language-\">siparisler<\/code> tablosunda sipari\u015f bilgileri ve <code class=\"language-\">urunler<\/code> tablosunda \u00fcr\u00fcn bilgileri bulunmaktad\u0131r.  Her sipari\u015f bir m\u00fc\u015fteriye aittir ve her sipari\u015f bir veya daha fazla \u00fcr\u00fcnden olu\u015fabilir.<\/p>\n<p><strong>Yeni Ba\u015flayan:<\/strong><\/p>\n<p>A\u015fa\u011f\u0131daki sorgu, m\u00fc\u015fterilerin sipari\u015flerini ve sipari\u015flerde bulunan \u00fcr\u00fcnleri listeler:<\/p>\n<pre class=\"language-sql\"><code>SELECT\n    m.musteri_adi,\n    s.siparis_no,\n    u.urun_adi\nFROM\n    musteriler m\nLEFT JOIN\n    siparisler s ON m.musteri_id = s.musteri_id\nLEFT JOIN\n    urunler u ON s.siparis_id = u.siparis_id;<\/code><\/pre>\n<p>Bu sorgu, \u00f6nce <code class=\"language-\">musteriler<\/code> ve <code class=\"language-\">siparisler<\/code> tablolar\u0131n\u0131 <code class=\"language-\">musteri_id<\/code> s\u00fctunlar\u0131na g\u00f6re birle\u015ftirir ve ard\u0131ndan olu\u015fan sonucu <code class=\"language-\">urunler<\/code> tablosuyla <code class=\"language-\">siparis_id<\/code> s\u00fctunlar\u0131na g\u00f6re birle\u015ftirir.  Her m\u00fc\u015fteri i\u00e7in t\u00fcm sipari\u015fleri ve her sipari\u015f i\u00e7in t\u00fcm \u00fcr\u00fcnleri listeler.  E\u011fer bir m\u00fc\u015fterinin sipari\u015fi yoksa, <code class=\"language-\">siparis_no<\/code> ve <code class=\"language-\">urun_adi<\/code> s\u00fctunlar\u0131 <code class=\"language-\">NULL<\/code> olur.  E\u011fer bir sipari\u015fte \u00fcr\u00fcn yoksa, yine de sipari\u015f bilgileri g\u00f6r\u00fcnt\u00fclenir ancak <code class=\"language-\">urun_adi<\/code> <code class=\"language-\">NULL<\/code> olur.<\/p>\n<p><strong>Ger\u00e7ek D\u00fcnya \u00d6rne\u011fi: E-Ticaret Veri Analizi<\/strong><\/p>\n<p>Bir e-ticaret \u015firketinde \u00e7al\u0131\u015ft\u0131\u011f\u0131n\u0131z\u0131 ve m\u00fc\u015fterilerin sat\u0131n ald\u0131\u011f\u0131 \u00fcr\u00fcnleri, sipari\u015f tarihlerini ve \u00f6deme y\u00f6ntemlerini i\u00e7eren bir veri taban\u0131n\u0131z oldu\u011funu varsayal\u0131m.  Bu verileri \u00fc\u00e7 tabloda sakl\u0131yoruz: <code class=\"language-\">musteriler<\/code>, <code class=\"language-\">siparisler<\/code> ve <code class=\"language-\">odemeler<\/code>.  <code class=\"language-\">musteriler<\/code> tablosunda m\u00fc\u015fteri kimli\u011fi (<code class=\"language-\">musteri_id<\/code>), ad\u0131 ve soyad\u0131 bulunur. <code class=\"language-\">siparisler<\/code> tablosunda sipari\u015f kimli\u011fi (<code class=\"language-\">siparis_id<\/code>), m\u00fc\u015fteri kimli\u011fi (<code class=\"language-\">musteri_id<\/code>), sipari\u015f tarihi (<code class=\"language-\">siparis_tarihi<\/code>) ve toplam tutar bulunur.  <code class=\"language-\">odemeler<\/code> tablosunda \u00f6deme kimli\u011fi (<code class=\"language-\">odeme_id<\/code>), sipari\u015f kimli\u011fi (<code class=\"language-\">siparis_id<\/code>) ve \u00f6deme y\u00f6ntemi (<code class=\"language-\">odeme_yontemi<\/code>) bulunur.<\/p>\n<p><strong>Orta Seviye:<\/strong><\/p>\n<p>A\u015fa\u011f\u0131daki sorgu, her m\u00fc\u015fterinin sipari\u015flerini, sipari\u015f tarihlerini ve \u00f6deme y\u00f6ntemlerini listeler:<\/p>\n<pre class=\"language-sql\"><code>SELECT\n    m.musteri_adi,\n    m.musteri_soyadi,\n    s.siparis_tarihi,\n    o.odeme_yontemi\nFROM\n    musteriler m\nLEFT JOIN\n    siparisler s ON m.musteri_id = s.musteri_id\nLEFT JOIN\n    odemeler o ON s.siparis_id = o.siparis_id;<\/code><\/pre>\n<p>Bu sorgu, t\u00fcm m\u00fc\u015fterilerin bilgilerini g\u00f6sterir ve her m\u00fc\u015fteri i\u00e7in sipari\u015fleri ve \u00f6deme y\u00f6ntemlerini listeler.  E\u011fer bir m\u00fc\u015fterinin sipari\u015fi yoksa veya bir sipari\u015fin \u00f6deme bilgisi yoksa, ilgili s\u00fctunlar <code class=\"language-\">NULL<\/code> de\u011ferini al\u0131r.  Bu sorguyu daha da geli\u015ftirerek, \u00f6rne\u011fin, belirli bir tarih aral\u0131\u011f\u0131ndaki sipari\u015fleri filtreleyebilir veya \u00f6deme y\u00f6ntemlerine g\u00f6re gruplayabilirsiniz.<\/p>\n<p><strong>Performans Optimizasyonu \u0130pu\u00e7lar\u0131<\/strong><\/p>\n<p>\u00c7oklu tablo <code class=\"language-\">LEFT JOIN<\/code> sorgular\u0131n\u0131n performans\u0131n\u0131 iyile\u015ftirmek i\u00e7in birka\u00e7 \u00f6nemli ipucu bulunmaktad\u0131r:<\/p>\n<p>* <strong>\u0130ndeksler:<\/strong>  <code class=\"language-\">JOIN<\/code> ko\u015fullar\u0131nda kullan\u0131lan s\u00fctunlara indeks eklemek, sorgu performans\u0131n\u0131 \u00f6nemli \u00f6l\u00e7\u00fcde art\u0131rabilir.<br \/>\n* <strong>WHERE ko\u015fullar\u0131:<\/strong>  Gerekli verileri filtrelemek i\u00e7in <code class=\"language-\">WHERE<\/code> ko\u015fullar\u0131 kullan\u0131n.  Bu, veritaban\u0131n\u0131n taramas\u0131 gereken veri miktar\u0131n\u0131 azalt\u0131r.<br \/>\n* <strong>S\u00fctun se\u00e7imi:<\/strong>  Sadece gerekli s\u00fctunlar\u0131 se\u00e7in.  Gereksiz s\u00fctunlar\u0131 se\u00e7mek, sorgu performans\u0131n\u0131 olumsuz etkileyebilir.<br \/>\n* <strong>JOIN s\u0131ras\u0131:<\/strong>  <code class=\"language-\">LEFT JOIN<\/code> i\u015flemlerinin s\u0131ras\u0131, sorgu performans\u0131n\u0131 etkileyebilir.  En k\u00fc\u00e7\u00fck tabloyla ba\u015flamak genellikle daha iyidir.<br \/>\n* <strong>EXPLAIN ANALYZE:<\/strong>  <code class=\"language-\">EXPLAIN ANALYZE<\/code> komutunu kullanarak sorgunuzun performans\u0131n\u0131 analiz edin ve iyile\u015ftirme alanlar\u0131n\u0131 belirleyin.  Bu, sorgu y\u00fcr\u00fctme plan\u0131n\u0131 g\u00f6sterir ve performans darbo\u011fazlar\u0131n\u0131 belirlemenize yard\u0131mc\u0131 olur.<\/p>\n<p><strong>\u0130leri D\u00fczey: Karma\u015f\u0131k Sorgular ve Edge Case&#8217;ler<\/strong><\/p>\n<p><strong>\u0130leri Seviye:<\/strong><\/p>\n<p>Daha karma\u015f\u0131k senaryolarda, birden fazla <code class=\"language-\">LEFT JOIN<\/code> kullanarak ve alt sorgular ekleyerek daha detayl\u0131 analizler yapabilirsiniz.  \u00d6rne\u011fin, her m\u00fc\u015fterinin yapt\u0131\u011f\u0131 toplam harcamay\u0131 hesaplamak i\u00e7in alt sorgu kullanabilirsiniz:<\/p>\n<pre class=\"language-sql\"><code>SELECT\n    m.musteri_adi,\n    SUM(s.toplam_tutar) AS toplam_harcama\nFROM\n    musteriler m\nLEFT JOIN\n    siparisler s ON m.musteri_id = s.musteri_id\nGROUP BY\n    m.musteri_adi;<\/code><\/pre>\n<p>Bu sorgu, her m\u00fc\u015fteri i\u00e7in toplam harcamay\u0131 hesaplar ve <code class=\"language-\">NULL<\/code> de\u011ferlerini dikkate almaz.  E\u011fer bir m\u00fc\u015fterinin sipari\u015fi yoksa, <code class=\"language-\">toplam_harcama<\/code> de\u011feri 0 olur.  Bu t\u00fcr karma\u015f\u0131k sorgular\u0131 optimize etmek i\u00e7in, yukar\u0131da belirtilen performans optimizasyon ipu\u00e7lar\u0131n\u0131 uygulamak ve <code class=\"language-\">EXPLAIN ANALYZE<\/code> komutunu kullanarak sorgu y\u00fcr\u00fctme plan\u0131n\u0131 analiz etmek \u00f6nemlidir.  Ayr\u0131ca, b\u00fcy\u00fck veri k\u00fcmeleri i\u00e7in daha geli\u015fmi\u015f optimizasyon tekniklerini, \u00f6rne\u011fin materyalize g\u00f6r\u00fcn\u00fcmleri (materialized views) kullanmay\u0131 d\u00fc\u015f\u00fcnebilirsiniz.<\/p>\n<p><strong>Sonu\u00e7<\/strong><\/p>\n<p>PostgreSQL&#8217;de \u00e7oklu tablo <code class=\"language-\">LEFT JOIN<\/code> kullan\u0131m\u0131, veritaban\u0131n\u0131zdan etkili bir \u015fekilde veri \u00e7ekmenizi sa\u011flar.  Bu makalede, temel kavramlardan ileri seviye tekniklere kadar ad\u0131m ad\u0131m bir rehber sunduk.  Veri analizinde kar\u015f\u0131la\u015fabilece\u011finiz farkl\u0131 senaryolara uygun \u00f6rnekler verdik ve performans optimizasyonu i\u00e7in \u00f6nemli ipu\u00e7lar\u0131n\u0131 payla\u015ft\u0131k.  Unutmay\u0131n ki, do\u011fru indeksleme ve sorgu optimizasyonu, b\u00fcy\u00fck veri k\u00fcmeleriyle \u00e7al\u0131\u015f\u0131rken performans\u0131 \u00f6nemli \u00f6l\u00e7\u00fcde etkiler.  Daha fazla bilgi ve ileri seviye PostgreSQL teknikleri i\u00e7in [fatihsoysal.com](https:\/\/fatihsoysal.com) adresini ziyaret edebilirsiniz.<\/p>\n<p><strong>S\u0131k\u00e7a Sorulan Sorular:<\/strong><\/p>\n<p>1. <strong><code class=\"language-\">LEFT JOIN<\/code> ile <code class=\"language-\">INNER JOIN<\/code> aras\u0131ndaki fark nedir?<\/strong>  <code class=\"language-\">LEFT JOIN<\/code>, sol taraftaki tablodaki t\u00fcm sat\u0131rlar\u0131 d\u00f6nd\u00fcr\u00fcrken, <code class=\"language-\">INNER JOIN<\/code> sadece her iki tabloda da e\u015fle\u015fen sat\u0131rlar\u0131 d\u00f6nd\u00fcr\u00fcr.<\/p>\n<p>2. <strong>\u00c7oklu <code class=\"language-\">LEFT JOIN<\/code> kullan\u0131rken performans sorunlar\u0131yla nas\u0131l ba\u015fa \u00e7\u0131kabilirim?<\/strong>  \u0130ndeksleme, <code class=\"language-\">WHERE<\/code> ko\u015fullar\u0131, s\u00fctun se\u00e7imi ve <code class=\"language-\">EXPLAIN ANALYZE<\/code> komutu kullanarak performans\u0131 optimize edebilirsiniz.<\/p>\n<p>3. <strong><code class=\"language-\">LEFT JOIN<\/code> sorgular\u0131nda <code class=\"language-\">NULL<\/code> de\u011ferlerini nas\u0131l ele alabilirim?<\/strong>  <code class=\"language-\">COALESCE<\/code> veya <code class=\"language-\">IS NULL<\/code> gibi fonksiyonlar\u0131 kullanarak <code class=\"language-\">NULL<\/code> de\u011ferlerini i\u015fleyebilirsiniz.<\/p>\n<p>4. <strong>\u00c7ok b\u00fcy\u00fck tablolarla \u00e7al\u0131\u015f\u0131rken performans\u0131 nas\u0131l iyile\u015ftirebilirim?<\/strong>  Materyalize g\u00f6r\u00fcn\u00fcmler (materialized views) veya par\u00e7alama (partitioning) gibi geli\u015fmi\u015f teknikleri kullanmay\u0131 d\u00fc\u015f\u00fcnebilirsiniz.<\/p>\n<p>5. <strong>Karma\u015f\u0131k <code class=\"language-\">LEFT JOIN<\/code> sorgular\u0131n\u0131 nas\u0131l debug ederim?<\/strong>  <code class=\"language-\">EXPLAIN ANALYZE<\/code> komutunu kullanarak sorgu y\u00fcr\u00fctme plan\u0131n\u0131 inceleyin ve performans darbo\u011fazlar\u0131n\u0131 belirleyin.<\/p>\n<p>Yazar: Fatih Soysal<\/p>\n","protected":false},"excerpt":{"rendered":"# PostgreSQL&#8217;de \u00c7oklu Tablo LEFT JOIN Nas\u0131l Kullan\u0131l\u0131r? PostgreSQL veritaban\u0131n\u0131zda birden fazla tablodan veri \u00e7ekmeye mi \u00e7al\u0131\u015f\u0131yorsunuz? Karma\u015f\u0131k&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-25683","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: Birden \u00c7ok Tabloda LEFT JOIN Kullan\u0131m\u0131<\/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\/postgresql-birden-cok-tabloda-left-join-kullanimi\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PostgreSQL: Birden \u00c7ok Tabloda LEFT JOIN Kullan\u0131m\u0131\" \/>\n<meta property=\"og:description\" content=\"Hi\u00e7bir etiketi bulunamad\u0131.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/fatihsoysal.com\/blog\/postgresql-birden-cok-tabloda-left-join-kullanimi\/\" \/>\n<meta property=\"og:site_name\" content=\"Kodlar\u0131n Gizemli D\u00fcnyas\u0131\" \/>\n<meta property=\"article:published_time\" content=\"2025-07-11T12:15:24+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=\"7 dakika\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/postgresql-birden-cok-tabloda-left-join-kullanimi\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/postgresql-birden-cok-tabloda-left-join-kullanimi\/\"},\"author\":{\"name\":\"Fatih Soysal\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"headline\":\"PostgreSQL: Birden \u00c7ok Tabloda LEFT JOIN Kullan\u0131m\u0131\",\"datePublished\":\"2025-07-11T12:15:24+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/postgresql-birden-cok-tabloda-left-join-kullanimi\/\"},\"wordCount\":1113,\"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\/postgresql-birden-cok-tabloda-left-join-kullanimi\/#respond\"]}],\"copyrightYear\":\"2025\",\"copyrightHolder\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/postgresql-birden-cok-tabloda-left-join-kullanimi\/\",\"url\":\"https:\/\/fatihsoysal.com\/blog\/postgresql-birden-cok-tabloda-left-join-kullanimi\/\",\"name\":\"PostgreSQL: Birden \u00c7ok Tabloda LEFT JOIN Kullan\u0131m\u0131\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#website\"},\"datePublished\":\"2025-07-11T12:15:24+00:00\",\"description\":\"Hi\u00e7bir etiketi bulunamad\u0131.\",\"breadcrumb\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/postgresql-birden-cok-tabloda-left-join-kullanimi\/#breadcrumb\"},\"inLanguage\":\"tr\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/fatihsoysal.com\/blog\/postgresql-birden-cok-tabloda-left-join-kullanimi\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/postgresql-birden-cok-tabloda-left-join-kullanimi\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Anasayfa\",\"item\":\"https:\/\/fatihsoysal.com\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"PostgreSQL: Birden \u00c7ok Tabloda LEFT JOIN Kullan\u0131m\u0131\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#website\",\"url\":\"https:\/\/fatihsoysal.com\/blog\/\",\"name\":\"Fatihsoysal.com\",\"description\":\"Blog - 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