{"id":25818,"date":"2025-07-14T00:15:23","date_gmt":"2025-07-13T21:15:23","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/postgresql-bir-dizinin-baska-bir-dizi-icinde-olup-olmadiginin-kontrol-edilmesi\/"},"modified":"2025-07-14T00:15:23","modified_gmt":"2025-07-13T21:15:23","slug":"postgresql-bir-dizinin-baska-bir-dizi-icinde-olup-olmadiginin-kontrol-edilmesi","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/postgresql-bir-dizinin-baska-bir-dizi-icinde-olup-olmadiginin-kontrol-edilmesi\/","title":{"rendered":"PostgreSQL: Bir Dizinin Ba\u015fka Bir Dizi \u0130\u00e7inde Olup Olmad\u0131\u011f\u0131n\u0131n Kontrol Edilmesi"},"content":{"rendered":"<p># PostgreSQL&#8217;de Dizi \u0130\u00e7inde Dizi Kontrol\u00fc: Kapsaml\u0131 Bir Rehber<\/p>\n<p>PostgreSQL veritaban\u0131n\u0131zda \u00e7al\u0131\u015f\u0131yorsunuz ve bir dizinin ba\u015fka bir dizinin alt k\u00fcmesi olup olmad\u0131\u011f\u0131n\u0131 kontrol etmeniz gerekiyor mu?  Bu, \u00f6zellikle \u00fcr\u00fcn kategorileri, kullan\u0131c\u0131 rolleri veya co\u011frafi konumlar gibi verileri dizi olarak saklad\u0131\u011f\u0131n\u0131zda s\u0131k\u00e7a kar\u015f\u0131la\u015f\u0131lan bir durumdur. Bu makale, PostgreSQL&#8217;de dizi i\u00e7erme kontrol\u00fcn\u00fc ad\u0131m ad\u0131m, basit \u00f6rneklerden ileri d\u00fczey optimizasyonlara kadar kapsaml\u0131 bir \u015fekilde ele alacak.  Yeni ba\u015flayanlar i\u00e7in anla\u015f\u0131l\u0131r bir anlat\u0131mla ba\u015flay\u0131p, uzman seviyesine kadar ilerleyece\u011fiz.<\/p>\n<p><strong>\u00d6\u011frenme Yol Haritas\u0131<\/strong><\/p>\n<p>Bu rehber, konuyu kademeli olarak ele alarak, her seviyeden kullan\u0131c\u0131n\u0131n faydalanmas\u0131n\u0131 sa\u011flayacak \u015fekilde tasarlanm\u0131\u015ft\u0131r.<\/p>\n<p>* <strong>Yeni Ba\u015flayan:<\/strong> Temel kavramlar, basit <code class=\"language-\">@><\/code> operat\u00f6r\u00fc kullan\u0131m\u0131 ve \u00f6rnekler.<br \/>\n* <strong>Orta Seviye:<\/strong> Ger\u00e7ek d\u00fcnya senaryolar\u0131, performans optimizasyonu ipu\u00e7lar\u0131 ve <code class=\"language-\">&&<\/code> operat\u00f6r\u00fcn\u00fcn kullan\u0131m\u0131.<br \/>\n* <strong>\u0130leri Seviye:<\/strong> Karma\u015f\u0131k senaryolar, performans analizi, edge case&#8217;ler ve alternatif \u00e7\u00f6z\u00fcm y\u00f6ntemleri.<\/p>\n<p><strong>PostgreSQL Dizileri ile Temel Kavramlar<\/strong><\/p>\n<p>PostgreSQL, verileri tek bir s\u00fctunda birden fazla de\u011fer saklamak i\u00e7in dizi veri tipini destekler. Diziler, ayn\u0131 veri tipindeki de\u011ferlerin virg\u00fcl ile ayr\u0131lm\u0131\u015f ve parantez i\u00e7inde (<code class=\"language-\">{}<\/code>) g\u00f6sterildi\u011fi s\u0131ral\u0131 koleksiyonlard\u0131r. \u00d6rne\u011fin, <code class=\"language-\">{1, 2, 3}<\/code> bir tamsay\u0131 dizisi, <code class=\"language-\">{'elma', 'armut', 'muz'}<\/code> ise bir metin dizisidir.  Diziler, ili\u015fkili verileri tek bir s\u00fctunda tutarak veritaban\u0131 tasar\u0131m\u0131 ve sorgulamalar\u0131n\u0131 basitle\u015ftirebilir. Ancak, karma\u015f\u0131k sorgulamalar i\u00e7in \u00f6zel operat\u00f6rler ve fonksiyonlar kullan\u0131lmas\u0131 gerekebilir.  Daha detayl\u0131 bilgi i\u00e7in [Fatih Soysal&#8217;\u0131n PostgreSQL ile ilgili blog yaz\u0131lar\u0131n\u0131](https:\/\/fatihsoysal.com) inceleyebilirsiniz.<\/p>\n<p><strong>PostgreSQL&#8217;de Dizi \u0130\u00e7inde Dizi Kontrol\u00fc: <code class=\"language-\">@><\/code> Operat\u00f6r\u00fc<\/strong><\/p>\n<p>Bir dizinin ba\u015fka bir diziyi i\u00e7erip i\u00e7ermedi\u011fini kontrol etmenin en basit yolu, PostgreSQL&#8217;in sa\u011flad\u0131\u011f\u0131 <code class=\"language-\">@><\/code> operat\u00f6r\u00fcd\u00fcr. Bu operat\u00f6r, sol taraftaki dizinin sa\u011f taraftaki diziyi <strong>tam olarak<\/strong> i\u00e7erip i\u00e7ermedi\u011fini kontrol eder.  E\u011fer sol taraftaki dizi, sa\u011f taraftaki dizinin t\u00fcm elemanlar\u0131n\u0131 i\u00e7eriyorsa, sonu\u00e7 <code class=\"language-\">true<\/code>, aksi takdirde <code class=\"language-\">false<\/code> olur.<\/p>\n<p><strong>Yeni Ba\u015flayan \u00d6rne\u011fi:<\/strong><\/p>\n<pre class=\"language-sql\"><code>SELECT '{1, 2, 3}' @&gt; '{1, 2}'; -- true\nSELECT '{1, 2, 3}' @&gt; '{1, 4}'; -- false\nSELECT '{1, 2, 3, 4}' @&gt; '{1, 2, 3}'; -- true\nSELECT '{1, 2, 3}' @&gt; '{1, 2, 3, 4}'; -- false<\/code><\/pre>\n<p>Bu \u00f6rneklerde, <code class=\"language-\">@><\/code> operat\u00f6r\u00fc, sol taraftaki dizinin sa\u011f taraftaki diziyi i\u00e7erip i\u00e7ermedi\u011fini kontrol eder.  S\u0131ra \u00f6nemlidir.  Elemanlar\u0131n s\u0131ras\u0131 ayn\u0131 olmal\u0131d\u0131r.<\/p>\n<p><strong>Ger\u00e7ek D\u00fcnya \u00d6rne\u011fi: \u00dcr\u00fcn Kategorileri<\/strong><\/p>\n<p>Bir e-ticaret sitesinin \u00fcr\u00fcn kategorilerini d\u00fc\u015f\u00fcnelim.  Her \u00fcr\u00fcn bir veya daha fazla kategoriye ait olabilir.  \u00dcr\u00fcnler ve kategoriler \u015fu \u015fekilde bir tabloda saklanabilir:<\/p>\n<pre class=\"language-sql\"><code>CREATE TABLE products (\n    product_id INT PRIMARY KEY,\n    categories INT[]\n);\n\nINSERT INTO products (product_id, categories) VALUES\n(1, '{1, 2}'),\n(2, '{2, 3}'),\n(3, '{1, 2, 3}');<\/code><\/pre>\n<p>\u015eimdi, <code class=\"language-\">1<\/code> ve <code class=\"language-\">2<\/code> kategorilerini i\u00e7eren \u00fcr\u00fcnleri bulmak istedi\u011fimizi varsayal\u0131m:<\/p>\n<pre class=\"language-sql\"><code>SELECT * FROM products WHERE categories @&gt; '{1, 2}';<\/code><\/pre>\n<p>Bu sorgu, <code class=\"language-\">product_id<\/code>&#8216;si 1 ve 3 olan \u00fcr\u00fcnleri d\u00f6nd\u00fcrecektir.<\/p>\n<p><strong>Performans Optimizasyonu \u0130pu\u00e7lar\u0131<\/strong><\/p>\n<p>B\u00fcy\u00fck veri k\u00fcmeleri \u00fczerinde \u00e7al\u0131\u015f\u0131rken, dizi i\u00e7erme kontrol\u00fc performans\u0131 etkileyebilir.  \u0130\u015fte baz\u0131 optimizasyon ipu\u00e7lar\u0131:<\/p>\n<p>* <strong>\u0130ndeks kullan\u0131m\u0131:<\/strong> Diziler \u00fczerinde indeks olu\u015fturmak, sorgulama performans\u0131n\u0131 art\u0131rabilir. Ancak, dizilerin uzunlu\u011fu ve eleman say\u0131s\u0131 artt\u0131k\u00e7a indekslerin performans\u0131 d\u00fc\u015febilir.<br \/>\n* <strong>GIN indeksleri:<\/strong>  GIN (Generalized Inverted Index) indeksleri, dizi i\u00e7erme kontrol\u00fc i\u00e7in daha uygun olabilir.<br \/>\n* <strong>Par\u00e7al\u0131 indeksleme:<\/strong> \u00c7ok b\u00fcy\u00fck diziler i\u00e7in, dizileri daha k\u00fc\u00e7\u00fck par\u00e7alara b\u00f6lerek indeksleme performans\u0131n\u0131 art\u0131rabilirsiniz.<br \/>\n* <strong>Alternatif veri yap\u0131lar\u0131:<\/strong>  E\u011fer dizi i\u00e7erme kontrol\u00fc s\u0131k\u00e7a yap\u0131l\u0131yorsa, ili\u015fkisel tablolar kullanmak daha verimli olabilir.<\/p>\n<p><strong>PostgreSQL&#8217;de Dizi \u0130\u00e7inde Dizi Kontrol\u00fc: <code class=\"language-\">&&<\/code> Operat\u00f6r\u00fc<\/strong><\/p>\n<p><code class=\"language-\">@><\/code> operat\u00f6r\u00fcn\u00fcn aksine, <code class=\"language-\">&&<\/code> operat\u00f6r\u00fc iki dizinin ortak elemanlar\u0131n\u0131n olup olmad\u0131\u011f\u0131n\u0131 kontrol eder.  E\u011fer iki dizi ortak en az bir elemana sahipse, sonu\u00e7 <code class=\"language-\">true<\/code>, aksi takdirde <code class=\"language-\">false<\/code> olur.<\/p>\n<p><strong>Orta Seviye \u00d6rne\u011fi:<\/strong><\/p>\n<pre class=\"language-sql\"><code>SELECT '{1, 2, 3}' &amp;&amp; '{3, 4, 5}'; -- true\nSELECT '{1, 2}' &amp;&amp; '{3, 4}'; -- false<\/code><\/pre>\n<p>Bu operat\u00f6r, bir \u00fcr\u00fcn\u00fcn birden fazla kategoriye ait oldu\u011fu durumlarda, belirli bir kategoriye ait \u00fcr\u00fcnleri bulmak i\u00e7in kullan\u0131labilir.<\/p>\n<p><strong>\u0130leri D\u00fczey Senaryolar: Karma\u015f\u0131k Ko\u015fullar ve Edge Case&#8217;ler<\/strong><\/p>\n<p>Bazen, daha karma\u015f\u0131k ko\u015fullar i\u00e7eren dizi i\u00e7erme kontrol\u00fc gerekebilir. \u00d6rne\u011fin, bir dizinin ba\u015fka bir diziyi <strong>k\u0131smen<\/strong> i\u00e7erip i\u00e7ermedi\u011fini kontrol etmek isteyebilirsiniz. Bu durumda, <code class=\"language-\">@><\/code> operat\u00f6r\u00fc yerine, <code class=\"language-\">unnest<\/code> fonksiyonu ve <code class=\"language-\">ANY<\/code> operat\u00f6r\u00fc kullan\u0131labilir.<\/p>\n<p><strong>\u0130leri Seviye \u00d6rne\u011fi:<\/strong><\/p>\n<pre class=\"language-sql\"><code>SELECT * FROM products WHERE 1 = ANY(categories);<\/code><\/pre>\n<p>Bu sorgu, <code class=\"language-\">categories<\/code> dizisi i\u00e7inde <code class=\"language-\">1<\/code> de\u011ferini i\u00e7eren t\u00fcm \u00fcr\u00fcnleri d\u00f6nd\u00fcr\u00fcr.  Bu, <code class=\"language-\">@><\/code> operat\u00f6r\u00fcnden farkl\u0131 olarak, dizinin sadece bir k\u0131sm\u0131n\u0131n kontrol edilmesini sa\u011flar.<\/p>\n<p><strong>Performans Analizi ve Optimizasyon<\/strong><\/p>\n<p>B\u00fcy\u00fck veri k\u00fcmeleri i\u00e7in performans analizi kritik \u00f6neme sahiptir.  <code class=\"language-\">EXPLAIN ANALYZE<\/code> komutu, sorgu plan\u0131n\u0131 ve y\u00fcr\u00fctme s\u00fcresini g\u00f6sterir.  Bu bilgiye dayanarak, indeksleme stratejilerini optimize edebilir ve alternatif sorgu y\u00f6ntemleri deneyebilirsiniz.<\/p>\n<p><strong>Sonu\u00e7<\/strong><\/p>\n<p>PostgreSQL&#8217;de dizi i\u00e7erme kontrol\u00fc, <code class=\"language-\">@><\/code> ve <code class=\"language-\">&&<\/code> operat\u00f6rleri kullan\u0131larak kolayca ger\u00e7ekle\u015ftirilebilir.  Ancak, performans optimizasyonu, \u00f6zellikle b\u00fcy\u00fck veri k\u00fcmeleri i\u00e7in \u00f6nemlidir.  Bu makalede ele al\u0131nan ipu\u00e7lar\u0131 ve \u00f6rnekler, PostgreSQL&#8217;de dizi i\u015flemlerini daha etkili bir \u015fekilde y\u00f6netmenize yard\u0131mc\u0131 olacakt\u0131r.  [Fatih Soysal&#8217;\u0131n web sitesi](https:\/\/fatihsoysal.com) \u00fczerinden daha fazla PostgreSQL i\u00e7eri\u011fine ula\u015fabilirsiniz.<\/p>\n<p><strong>S\u0131k\u00e7a Sorulan Sorular:<\/strong><\/p>\n<p>1. <strong>Diziler \u00fczerinde indeks olu\u015fturman\u0131n performansa etkisi nedir?<\/strong>  Diziler \u00fczerinde indeks olu\u015fturmak, k\u00fc\u00e7\u00fck diziler i\u00e7in faydal\u0131 olabilir, ancak b\u00fcy\u00fck diziler i\u00e7in performans d\u00fc\u015f\u00fc\u015f\u00fcne neden olabilir. GIN indeksleri daha etkili olabilir.<br \/>\n2. <strong><code class=\"language-\">@><\/code> ve <code class=\"language-\">&&<\/code> operat\u00f6rleri aras\u0131ndaki fark nedir?<\/strong> <code class=\"language-\">@><\/code> operat\u00f6r\u00fc tam i\u00e7erme kontrol\u00fc yaparken, <code class=\"language-\">&&<\/code> operat\u00f6r\u00fc ortak eleman kontrol\u00fc yapar.<br \/>\n3. <strong>Dizi i\u00e7erme kontrol\u00fc i\u00e7in alternatif y\u00f6ntemler nelerdir?<\/strong> \u0130li\u015fkisel tablolar, \u00f6zellikle \u00e7ok say\u0131da dizi i\u00e7erme kontrol\u00fc gerekti\u011finde daha verimli olabilir.<br \/>\n4. <strong>Performans sorunlar\u0131n\u0131 nas\u0131l tespit edebilirim?<\/strong> <code class=\"language-\">EXPLAIN ANALYZE<\/code> komutu ile sorgu plan\u0131n\u0131 ve y\u00fcr\u00fctme s\u00fcresini inceleyebilirsiniz.<br \/>\n5. <strong>\u00c7ok b\u00fcy\u00fck diziler i\u00e7in ne yapabilirim?<\/strong> \u00c7ok b\u00fcy\u00fck dizileri daha k\u00fc\u00e7\u00fck par\u00e7alara b\u00f6lerek indeksleme performans\u0131n\u0131 art\u0131rabilirsiniz veya alternatif veri yap\u0131lar\u0131 kullanabilirsiniz.<\/p>\n<p>Yazar: Fatih Soysal<\/p>\n","protected":false},"excerpt":{"rendered":"# PostgreSQL&#8217;de Dizi \u0130\u00e7inde Dizi Kontrol\u00fc: Kapsaml\u0131 Bir Rehber PostgreSQL veritaban\u0131n\u0131zda \u00e7al\u0131\u015f\u0131yorsunuz ve bir dizinin ba\u015fka bir dizinin&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-25818","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 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