{"id":25573,"date":"2025-07-08T21:15:25","date_gmt":"2025-07-08T18:15:25","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/postgresqlde-countif-nasil-kullanilir\/"},"modified":"2025-07-08T21:15:25","modified_gmt":"2025-07-08T18:15:25","slug":"postgresqlde-countif-nasil-kullanilir","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/postgresqlde-countif-nasil-kullanilir\/","title":{"rendered":"PostgreSQL&#8217;de COUNTIF Nas\u0131l Kullan\u0131l\u0131r"},"content":{"rendered":"<p># PostgreSQL&#8217;de COUNTIF Nas\u0131l Kullan\u0131l\u0131r?<\/p>\n<p>PostgreSQL veritaban\u0131n\u0131zda belirli bir ko\u015fulu sa\u011flayan sat\u0131r say\u0131s\u0131n\u0131 h\u0131zl\u0131ca \u00f6\u011frenmek istiyorsunuz, ancak Excel&#8217;deki gibi kullan\u0131\u015fl\u0131 bir <code class=\"language-\">COUNTIF<\/code> fonksiyonu yok mu? Endi\u015felenmeyin! Bu makalede, PostgreSQL&#8217;de <code class=\"language-\">COUNTIF<\/code> mant\u0131\u011f\u0131n\u0131 nas\u0131l uygulayaca\u011f\u0131n\u0131z\u0131, performans\u0131 nas\u0131l optimize edece\u011finizi ve karma\u015f\u0131k senaryolarla nas\u0131l ba\u015fa \u00e7\u0131kaca\u011f\u0131n\u0131z\u0131 ad\u0131m ad\u0131m \u00f6\u011freneceksiniz.  Veri analizi s\u00fcre\u00e7lerinizi h\u0131zland\u0131racak ve verilerinizden daha fazla bilgi \u00e7\u0131karman\u0131za yard\u0131mc\u0131 olacak pratik y\u00f6ntemler ve ger\u00e7ek d\u00fcnya \u00f6rnekleri sunaca\u011f\u0131z.<\/p>\n<p><strong>PostgreSQL&#8217;de COUNTIF&#8217;e Benzer \u0130\u015flemler: \u00d6\u011frenme Yol Haritas\u0131<\/strong><\/p>\n<p>Bu rehber, PostgreSQL&#8217;de ko\u015fullu say\u0131m yapmay\u0131 \u00f6\u011frenmek i\u00e7in \u00fc\u00e7 seviyeden olu\u015fmaktad\u0131r:<\/p>\n<p><strong>Yeni Ba\u015flayan:<\/strong>  <code class=\"language-\">COUNT<\/code> fonksiyonu ve <code class=\"language-\">WHERE<\/code> klavuzu ile basit ko\u015fullu say\u0131mlar.<\/p>\n<p><strong>Orta:<\/strong>  Karma\u015f\u0131k ko\u015fullar, <code class=\"language-\">CASE<\/code> ifadeleri ve performans optimizasyonu teknikleri.<\/p>\n<p><strong>\u0130leri D\u00fczey:<\/strong>  Performans analizi, indeksleme stratejileri ve nadir durumlar (edge cases).<\/p>\n<p><strong>1. Temel Kavramlar: COUNT ve WHERE Klavuzu<\/strong><\/p>\n<p>PostgreSQL&#8217;de, <code class=\"language-\">COUNT(*)<\/code> fonksiyonu bir tablodaki t\u00fcm sat\u0131rlar\u0131n say\u0131s\u0131n\u0131 verir.  Ancak, belirli bir ko\u015fulu sa\u011flayan sat\u0131rlar\u0131 saymak i\u00e7in <code class=\"language-\">WHERE<\/code> klavuzunu kullanmal\u0131y\u0131z.  Bu, Excel&#8217;deki <code class=\"language-\">COUNTIF<\/code> fonksiyonunun temel i\u015flevselli\u011fine denk gelir.<\/p>\n<p>\u00d6rnek olarak, bir <code class=\"language-\">urunler<\/code> tablomuz olsun ve bu tabloda <code class=\"language-\">kategori<\/code> adl\u0131 bir s\u00fctun bulunsun.  &#8220;Elektronik&#8221; kategorisindeki \u00fcr\u00fcn say\u0131s\u0131n\u0131 saymak i\u00e7in \u015fu sorguyu kullanabiliriz:<\/p>\n<pre class=\"language-sql\"><code>SELECT COUNT(*) \nFROM urunler\nWHERE kategori = 'Elektronik';<\/code><\/pre>\n<p>Bu sorgu, <code class=\"language-\">kategori<\/code> s\u00fctunu &#8220;Elektronik&#8221; olan t\u00fcm sat\u0131rlar\u0131 sayar ve sonucu d\u00f6nd\u00fcr\u00fcr.  Bu, <code class=\"language-\">COUNTIF<\/code>&#8216;in en basit uygulamas\u0131d\u0131r.<\/p>\n<p><strong>2.  Nas\u0131l Yap\u0131l\u0131r? \u00c7oklu Ko\u015fullar ve CASE \u0130fadeleri<\/strong><\/p>\n<p><code class=\"language-\">WHERE<\/code> klavuzu ile birden fazla ko\u015ful ekleyerek daha karma\u015f\u0131k say\u0131mlar yapabiliriz.  \u00d6rne\u011fin, hem &#8220;Elektronik&#8221; kategorisinde hem de fiyat\u0131 1000 TL&#8217;den fazla olan \u00fcr\u00fcn say\u0131s\u0131n\u0131 saymak i\u00e7in:<\/p>\n<pre class=\"language-sql\"><code>SELECT COUNT(*)\nFROM urunler\nWHERE kategori = 'Elektronik' AND fiyat &gt; 1000;<\/code><\/pre>\n<p>Daha karma\u015f\u0131k ko\u015fullar i\u00e7in <code class=\"language-\">CASE<\/code> ifadelerini kullanabiliriz.  \u00d6rne\u011fin, fiyat\u0131 1000 TL&#8217;den fazla olan \u00fcr\u00fcnlere &#8220;Pahal\u0131&#8221;, de\u011filse &#8220;Ucuz&#8221; etiketi atayarak her kategorideki \u00fcr\u00fcn say\u0131s\u0131n\u0131 sayal\u0131m:<\/p>\n<pre class=\"language-sql\"><code>SELECT\n  COUNT(CASE WHEN fiyat &gt; 1000 THEN 1 END) AS PahaliUrunSayisi,\n  COUNT(CASE WHEN fiyat &lt;= 1000 THEN 1 END) AS UcuzUrunSayisi\nFROM urunler;<\/code><\/pre>\n<p>Bu sorgu, <code class=\"language-\">CASE<\/code> ifadesi ile her sat\u0131r i\u00e7in bir ko\u015ful kontrol eder ve <code class=\"language-\">COUNT<\/code> fonksiyonu ile her ko\u015fulu sa\u011flayan sat\u0131rlar\u0131 sayar.<\/p>\n<p><strong>3. Ger\u00e7ek Hayat \u00d6rne\u011fi: E-Ticaret Veri Analizi<\/strong><\/p>\n<p>Bir e-ticaret sitesinin verilerini ele alal\u0131m.  <code class=\"language-\">siparisler<\/code> adl\u0131 bir tablomuz olsun ve bu tabloda <code class=\"language-\">durum<\/code> (\u00d6rn: &#8220;Tamamland\u0131&#8221;, &#8220;\u0130ptal Edildi&#8221;, &#8220;Teslimat Bekliyor&#8221;) ve <code class=\"language-\">odeme_yontemi<\/code> (\u00d6rn: &#8220;Kredi Kart\u0131&#8221;, &#8220;Havale&#8221;, &#8220;Kap\u0131da \u00d6deme&#8221;) s\u00fctunlar\u0131 bulunsun.<\/p>\n<p>&#8220;Kredi Kart\u0131&#8221; ile yap\u0131lan ve &#8220;Tamamland\u0131&#8221; durumundaki sipari\u015f say\u0131s\u0131n\u0131 bulmak i\u00e7in:<\/p>\n<pre class=\"language-sql\"><code>SELECT COUNT(*)\nFROM siparisler\nWHERE odeme_yontemi = 'Kredi Kart\u0131' AND durum = 'Tamamland\u0131';<\/code><\/pre>\n<p>Daha ileri giderek, her \u00f6deme y\u00f6ntemine g\u00f6re tamamlanan sipari\u015f say\u0131s\u0131n\u0131 g\u00f6rmek istersek:<\/p>\n<pre class=\"language-sql\"><code>SELECT odeme_yontemi, COUNT(*) AS tamamlanan_siparis_sayisi\nFROM siparisler\nWHERE durum = 'Tamamland\u0131'\nGROUP BY odeme_yontemi;<\/code><\/pre>\n<p>Bu sorgu, <code class=\"language-\">GROUP BY<\/code> klavuzu ile her \u00f6deme y\u00f6ntemini grupland\u0131r\u0131r ve her grup i\u00e7in tamamlanan sipari\u015f say\u0131s\u0131n\u0131 g\u00f6sterir.<\/p>\n<p><strong>4. Performans Optimizasyonu: \u0130ndeksleme ve Sorgu Planlay\u0131c\u0131s\u0131<\/strong><\/p>\n<p>B\u00fcy\u00fck veri k\u00fcmeleriyle \u00e7al\u0131\u015f\u0131rken, sorgu performans\u0131 kritik \u00f6neme sahiptir.  <code class=\"language-\">WHERE<\/code> klavuzunda kulland\u0131\u011f\u0131n\u0131z s\u00fctunlara indeks eklemek, sorgu h\u0131z\u0131n\u0131 \u00f6nemli \u00f6l\u00e7\u00fcde art\u0131rabilir.  \u00d6rne\u011fin, <code class=\"language-\">urunler<\/code> tablosundaki <code class=\"language-\">kategori<\/code> ve <code class=\"language-\">fiyat<\/code> s\u00fctunlar\u0131na indeks eklemek i\u00e7in:<\/p>\n<pre class=\"language-sql\"><code>CREATE INDEX kategori_index ON urunler (kategori);\nCREATE INDEX fiyat_index ON urunler (fiyat);<\/code><\/pre>\n<p>Ayr\u0131ca, PostgreSQL&#8217;in sorgu planlay\u0131c\u0131s\u0131n\u0131 kullanarak sorgular\u0131n\u0131z\u0131n performans\u0131n\u0131 analiz edebilir ve gerekti\u011finde optimize edebilirsiniz.  <code class=\"language-\">EXPLAIN<\/code> komutu ile sorgu plan\u0131n\u0131 inceleyebilirsiniz:<\/p>\n<pre class=\"language-sql\"><code>EXPLAIN SELECT COUNT(*) FROM urunler WHERE kategori = 'Elektronik';<\/code><\/pre>\n<p>Bu komut, sorgu plan\u0131n\u0131 g\u00f6sterir ve hangi indekslerin kullan\u0131ld\u0131\u011f\u0131n\u0131, hangi tablolar\u0131n tarand\u0131\u011f\u0131n\u0131 ve di\u011fer performans bilgilerini i\u00e7erir.<\/p>\n<p><strong>5. \u0130leri D\u00fczey Teknikler:  Karma\u015f\u0131k Ko\u015fullar ve Fonksiyonlar<\/strong><\/p>\n<p><code class=\"language-\">WHERE<\/code> klavuzunda daha karma\u015f\u0131k ko\u015fullar kullanabilirsiniz.  \u00d6rne\u011fin, <code class=\"language-\">LIKE<\/code> operat\u00f6r\u00fc ile belirli bir kal\u0131ba uyan sat\u0131rlar\u0131 sayabilirsiniz:<\/p>\n<pre class=\"language-sql\"><code>SELECT COUNT(*)\nFROM urunler\nWHERE urun_adi LIKE '%Telefon%';<\/code><\/pre>\n<p>Ayr\u0131ca, tarih ve zaman fonksiyonlar\u0131n\u0131 kullanarak tarih aral\u0131klar\u0131na g\u00f6re say\u0131mlar yapabilirsiniz:<\/p>\n<pre class=\"language-sql\"><code>SELECT COUNT(*)\nFROM siparisler\nWHERE siparis_tarihi BETWEEN '2023-10-01' AND '2023-10-31';<\/code><\/pre>\n<p><strong>6. Edge Case&#8217;ler ve Hata Ay\u0131klama<\/strong><\/p>\n<p>Veri temizli\u011fi ve tutarl\u0131l\u0131\u011f\u0131, do\u011fru sonu\u00e7lar elde etmek i\u00e7in \u00e7ok \u00f6nemlidir.  Bo\u015f veya NULL de\u011ferler, beklenmedik sonu\u00e7lara yol a\u00e7abilir.  <code class=\"language-\">WHERE<\/code> klavuzunda <code class=\"language-\">IS NULL<\/code> veya <code class=\"language-\">IS NOT NULL<\/code> ko\u015fullar\u0131n\u0131 kullanarak NULL de\u011ferleri ele alabilirsiniz.<\/p>\n<p>\u00d6rne\u011fin, <code class=\"language-\">kategori<\/code> s\u00fctununda NULL de\u011feri olan \u00fcr\u00fcn say\u0131s\u0131n\u0131 saymak i\u00e7in:<\/p>\n<pre class=\"language-sql\"><code>SELECT COUNT(*)\nFROM urunler\nWHERE kategori IS NULL;<\/code><\/pre>\n<p><strong>7.  Nas\u0131l Yap\u0131l\u0131r?  Performans Analizi ve Optimizasyon \u0130pu\u00e7lar\u0131<\/strong><\/p>\n<p>PostgreSQL&#8217;in sundu\u011fu ara\u00e7lar\u0131 kullanarak sorgu performans\u0131n\u0131 analiz edebilir ve iyile\u015ftirebilirsiniz.  <code class=\"language-\">EXPLAIN ANALYZE<\/code> komutu, sorgu y\u00fcr\u00fctme s\u00fcresi ve maliyetine ili\u015fkin detayl\u0131 bilgiler sa\u011flar.  Bu bilgiler \u0131\u015f\u0131\u011f\u0131nda, indeksleme stratejilerinizi revize edebilir, sorgu yap\u0131n\u0131z\u0131 de\u011fi\u015ftirebilir veya daha verimli fonksiyonlar kullanabilirsiniz.<\/p>\n<p>\u00d6rne\u011fin, b\u00fcy\u00fck bir tabloda <code class=\"language-\">WHERE<\/code> klavuzu ile \u00e7ok say\u0131da ko\u015ful kullan\u0131yorsan\u0131z, indeksleme stratejinizi g\u00f6zden ge\u00e7irmeniz gerekebilir.  Birden fazla s\u00fctunu i\u00e7eren bir kompozit indeks olu\u015fturmak performans\u0131 art\u0131rabilir.<\/p>\n<p><strong>8.  PostgreSQL&#8217;de COUNTIF&#8217;in Alternatifleri<\/strong><\/p>\n<p>PostgreSQL&#8217;de do\u011frudan <code class=\"language-\">COUNTIF<\/code> fonksiyonu bulunmamas\u0131na ra\u011fmen, <code class=\"language-\">COUNT<\/code> fonksiyonu ile <code class=\"language-\">WHERE<\/code> klavuzu ve <code class=\"language-\">CASE<\/code> ifadelerini birle\u015ftirerek ayn\u0131 i\u015flevi ger\u00e7ekle\u015ftirebilirsiniz.  Ayr\u0131ca, daha karma\u015f\u0131k durumlar i\u00e7in <code class=\"language-\">FILTER<\/code> klavuzu veya pencere fonksiyonlar\u0131 kullanabilirsiniz.<\/p>\n<p><strong>Sonu\u00e7<\/strong><\/p>\n<p>Bu makalede, PostgreSQL&#8217;de <code class=\"language-\">COUNTIF<\/code> mant\u0131\u011f\u0131n\u0131 nas\u0131l uygulayaca\u011f\u0131n\u0131z\u0131, performans\u0131 nas\u0131l optimize edece\u011finizi ve karma\u015f\u0131k senaryolarla nas\u0131l ba\u015fa \u00e7\u0131kaca\u011f\u0131n\u0131z\u0131 \u00f6\u011frendiniz.  Veri analizi s\u00fcre\u00e7lerinizi h\u0131zland\u0131racak ve verilerinizden daha fazla bilgi \u00e7\u0131karman\u0131za yard\u0131mc\u0131 olacak pratik y\u00f6ntemler ve ger\u00e7ek d\u00fcnya \u00f6rnekleri sunduk.  Unutmay\u0131n ki, veritaban\u0131 performans\u0131 i\u00e7in indeksleme ve sorgu optimizasyonu \u00e7ok \u00f6nemlidir.  Uygulamalar\u0131n\u0131zda bu teknikleri kullanarak daha verimli sorgular olu\u015fturabilirsiniz.  Daha detayl\u0131 bilgi ve ileri d\u00fczey konular 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>PostgreSQL&#8217;de <code class=\"language-\">COUNTIF<\/code> fonksiyonu var m\u0131?<\/strong>  Hay\u0131r, do\u011frudan bir <code class=\"language-\">COUNTIF<\/code> fonksiyonu yok, ancak <code class=\"language-\">COUNT<\/code> ve <code class=\"language-\">WHERE<\/code> klavuzu ile ayn\u0131 i\u015flevselli\u011fi sa\u011flayabilirsiniz.<\/p>\n<p>2. <strong>NULL de\u011ferleri nas\u0131l ele alabilirim?<\/strong>  <code class=\"language-\">WHERE<\/code> klavuzunda <code class=\"language-\">IS NULL<\/code> veya <code class=\"language-\">IS NOT NULL<\/code> ko\u015fullar\u0131n\u0131 kullanarak NULL de\u011ferleri kontrol edebilirsiniz.<\/p>\n<p>3. <strong>Performans\u0131 nas\u0131l optimize edebilirim?<\/strong>  \u0130ndeksleme, sorgu optimizasyonu ve veritaban\u0131 ayarlar\u0131n\u0131 inceleyerek performans\u0131 art\u0131rabilirsiniz.<\/p>\n<p>4. <strong>Karma\u015f\u0131k ko\u015fullar i\u00e7in hangi fonksiyonlar\u0131 kullanabilirim?<\/strong>  <code class=\"language-\">CASE<\/code>, <code class=\"language-\">LIKE<\/code>, tarih ve zaman fonksiyonlar\u0131 gibi bir\u00e7ok fonksiyon karma\u015f\u0131k ko\u015fullar olu\u015fturman\u0131za yard\u0131mc\u0131 olabilir.<\/p>\n<p>5. <strong>Sorgu performans\u0131m\u0131 nas\u0131l analiz edebilirim?<\/strong>  <code class=\"language-\">EXPLAIN<\/code> ve <code class=\"language-\">EXPLAIN ANALYZE<\/code> komutlar\u0131 ile sorgu plan\u0131n\u0131 ve performans\u0131n\u0131 inceleyebilirsiniz.<\/p>\n<p>Yazar: Fatih Soysal<\/p>\n","protected":false},"excerpt":{"rendered":"# PostgreSQL&#8217;de COUNTIF Nas\u0131l Kullan\u0131l\u0131r? PostgreSQL veritaban\u0131n\u0131zda belirli bir ko\u015fulu sa\u011flayan sat\u0131r say\u0131s\u0131n\u0131 h\u0131zl\u0131ca \u00f6\u011frenmek istiyorsunuz, ancak Excel&#8217;deki&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-25573","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 COUNTIF Nas\u0131l Kullan\u0131l\u0131r<\/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-countif-nasil-kullanilir\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PostgreSQL&#039;de COUNTIF Nas\u0131l Kullan\u0131l\u0131r\" \/>\n<meta property=\"og:description\" content=\"Hi\u00e7bir etiketi bulunamad\u0131.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/fatihsoysal.com\/blog\/postgresqlde-countif-nasil-kullanilir\/\" \/>\n<meta property=\"og:site_name\" content=\"Kodlar\u0131n Gizemli D\u00fcnyas\u0131\" \/>\n<meta property=\"article:published_time\" content=\"2025-07-08T18:15:25+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-countif-nasil-kullanilir\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/postgresqlde-countif-nasil-kullanilir\/\"},\"author\":{\"name\":\"Fatih Soysal\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"headline\":\"PostgreSQL&#8217;de COUNTIF Nas\u0131l Kullan\u0131l\u0131r\",\"datePublished\":\"2025-07-08T18:15:25+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/postgresqlde-countif-nasil-kullanilir\/\"},\"wordCount\":999,\"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-countif-nasil-kullanilir\/#respond\"]}],\"copyrightYear\":\"2025\",\"copyrightHolder\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/postgresqlde-countif-nasil-kullanilir\/\",\"url\":\"https:\/\/fatihsoysal.com\/blog\/postgresqlde-countif-nasil-kullanilir\/\",\"name\":\"PostgreSQL'de COUNTIF Nas\u0131l Kullan\u0131l\u0131r\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#website\"},\"datePublished\":\"2025-07-08T18:15:25+00:00\",\"description\":\"Hi\u00e7bir etiketi bulunamad\u0131.\",\"breadcrumb\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/postgresqlde-countif-nasil-kullanilir\/#breadcrumb\"},\"inLanguage\":\"tr\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/fatihsoysal.com\/blog\/postgresqlde-countif-nasil-kullanilir\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/postgresqlde-countif-nasil-kullanilir\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Anasayfa\",\"item\":\"https:\/\/fatihsoysal.com\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"PostgreSQL&#8217;de COUNTIF Nas\u0131l Kullan\u0131l\u0131r\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#website\",\"url\":\"https:\/\/fatihsoysal.com\/blog\/\",\"name\":\"Fatihsoysal.com\",\"description\":\"Blog - 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