{"id":14643,"date":"2025-03-09T06:15:15","date_gmt":"2025-03-09T03:15:15","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/baslangic-seviyesi-sql-mulakat-sorulari-ve-hazirligi\/"},"modified":"2025-03-09T06:15:15","modified_gmt":"2025-03-09T03:15:15","slug":"baslangic-seviyesi-sql-mulakat-sorulari-ve-hazirligi","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/baslangic-seviyesi-sql-mulakat-sorulari-ve-hazirligi\/","title":{"rendered":"Ba\u015flang\u0131\u00e7 Seviyesi SQL M\u00fclakat Sorular\u0131 ve Haz\u0131rl\u0131\u011f\u0131"},"content":{"rendered":"<p><body><\/p>\n<p>Ba\u015flang\u0131\u00e7 Seviyesi SQL M\u00fclakat Sorular\u0131 ve Haz\u0131rl\u0131\u011f\u0131<\/p>\n<p>Bir yaz\u0131l\u0131m geli\u015ftirici olarak kariyerinizde SQL&#8217;i bilmek olduk\u00e7a \u00f6nemlidir.  Veri tabanlar\u0131yla \u00e7al\u0131\u015fmak, hemen hemen her uygulamada ihtiya\u00e7 duyulan bir beceridir.  Bu nedenle, SQL ile ilgili sorular bir\u00e7ok yaz\u0131l\u0131m geli\u015ftirme m\u00fclakat\u0131n\u0131n ayr\u0131lmaz bir par\u00e7as\u0131d\u0131r.  \u00d6zellikle yeni ba\u015flayanlar i\u00e7in, m\u00fclakata  haz\u0131rl\u0131kl\u0131 olmak ve ba\u015far\u0131l\u0131 olmak i\u00e7in en yayg\u0131n sorular\u0131 ve cevaplama stratejilerini bilmek hayati \u00f6nem ta\u015f\u0131r.  Bu makalede, s\u0131k kar\u015f\u0131la\u015f\u0131lan SQL m\u00fclakat sorular\u0131n\u0131 ele alaca\u011f\u0131z ve  ba\u015far\u0131l\u0131 bir m\u00fclakat i\u00e7in nas\u0131l haz\u0131rl\u0131k yapabilece\u011finizi a\u00e7\u0131klayaca\u011f\u0131z.<\/p>\n<h2>En S\u0131k Sorulan SQL Sorular\u0131 ve Cevaplar\u0131<\/h2>\n<p>\u0130\u015fte ba\u015flang\u0131\u00e7 seviyesi SQL m\u00fclakatlar\u0131nda s\u0131kl\u0131kla kar\u015f\u0131la\u015f\u0131lan baz\u0131 sorular ve bunlara verilebilecek \u00f6rnek cevaplar:<\/p>\n<h3>1. SQL Nedir ve Ne \u0130\u015fe Yarar?<\/h3>\n<p>SQL (Structured Query Language), veritabanlar\u0131n\u0131 y\u00f6netmek i\u00e7in kullan\u0131lan bir dildir. Verileri sorgulamak, eklemek, g\u00fcncellemek ve silmek i\u00e7in kullan\u0131l\u0131r.  \u00d6rne\u011fin, bir e-ticaret sitesindeki m\u00fc\u015fteri verilerini y\u00f6netmek veya bir \u015firketin sat\u0131\u015f verilerini analiz etmek i\u00e7in SQL kullan\u0131l\u0131r.  K\u0131sacas\u0131, verileri organize etme ve y\u00f6netme konusunda g\u00fc\u00e7l\u00fc bir ara\u00e7t\u0131r.<\/p>\n<h3>2.  SELECT, FROM, WHERE Komutlar\u0131n\u0131 A\u00e7\u0131klay\u0131n.<\/h3>\n<p> Bunlar SQL&#8217;in temel komutlar\u0131d\u0131r.  <code>SELECT<\/code> komutu hangi s\u00fctunlar\u0131n verilece\u011fini belirtir.  <code>FROM<\/code> komutu hangi tablodaki verilerin al\u0131nd\u0131\u011f\u0131n\u0131 g\u00f6sterir.  <code>WHERE<\/code> komutu ise verilerin filtrelenmesini sa\u011flar.  \u00d6rnek olarak;  <code>SELECT isim, soyad FROM musteriler WHERE sehir = '\u0130stanbul';<\/code> komutu \u0130stanbul \u015fehrindeki m\u00fc\u015fterilerin isimlerini ve soyadlar\u0131n\u0131 getirir.<\/p>\n<h3>3.  JOIN Komutlar\u0131 Nelerdir ve Ne Zaman Kullan\u0131l\u0131r?<\/h3>\n<p>\u0130ki veya daha fazla tablodaki verileri birle\u015ftirmek i\u00e7in <code>JOIN<\/code> komutlar\u0131 kullan\u0131l\u0131r.  En yayg\u0131n olanlar\u0131 <code>INNER JOIN<\/code>, <code>LEFT JOIN<\/code>, <code>RIGHT JOIN<\/code> ve <code>FULL OUTER JOIN<\/code>&#8216;dir.  <code>INNER JOIN<\/code>, her iki tabloda da e\u015fle\u015fen kay\u0131tlar\u0131 getirirken,  <code>LEFT JOIN<\/code> sol tablodaki t\u00fcm kay\u0131tlar\u0131 ve sa\u011f tabloda e\u015fle\u015fen kay\u0131tlar\u0131 getirir.  <code>RIGHT JOIN<\/code> ise bunun tam tersidir.  <code>FULL OUTER JOIN<\/code> ise her iki tablodaki t\u00fcm kay\u0131tlar\u0131 getirir.<\/p>\n<h3>4.  GROUP BY ve HAVING Komutlar\u0131 Nelerdir?<\/h3>\n<p><code>GROUP BY<\/code> komutu verileri grupland\u0131rmak i\u00e7in kullan\u0131l\u0131r.  \u00d6rne\u011fin, her \u015fehirdeki m\u00fc\u015fteri say\u0131s\u0131n\u0131 bulmak i\u00e7in <code>GROUP BY<\/code> kullan\u0131labilir.  <code>HAVING<\/code> komutu ise gruplanm\u0131\u015f verileri filtrelemek i\u00e7in kullan\u0131l\u0131r.  \u00d6rne\u011fin, 10&#8217;dan fazla m\u00fc\u015fterisi olan \u015fehirleri bulmak i\u00e7in <code>HAVING<\/code> kullan\u0131labilir.<\/p>\n<h3>5.  ORDER BY Komutu Nas\u0131l Kullan\u0131l\u0131r?<\/h3>\n<p><code>ORDER BY<\/code> komutu, sonu\u00e7lar\u0131 belirli bir s\u00fctunda artan veya azalan s\u0131rada s\u0131ralamak i\u00e7in kullan\u0131l\u0131r.  \u00d6rne\u011fin, m\u00fc\u015fterileri alfabetik s\u0131raya g\u00f6re s\u0131ralamak i\u00e7in <code>ORDER BY isim ASC<\/code> kullan\u0131labilir (ASC artan, DESC azalan s\u0131ray\u0131 belirtir).<\/p>\n<h2>M\u00fclakata Haz\u0131rl\u0131k \u0130pu\u00e7lar\u0131<\/h2>\n<p>Ba\u015far\u0131l\u0131 bir SQL m\u00fclakat\u0131 i\u00e7in a\u015fa\u011f\u0131daki ipu\u00e7lar\u0131n\u0131 izleyin:<\/p>\n<ul>\n<li>SQL syntax&#8217;ini iyice \u00f6\u011frenin ve pratikte kullan\u0131n.<\/li>\n<li>Farkl\u0131 JOIN t\u00fcrlerini ve kullan\u0131m alanlar\u0131n\u0131 anlay\u0131n.<\/li>\n<li>Veritaban\u0131 y\u00f6netim sistemleri (DBMS) hakk\u0131nda temel bilgiler edinin (\u00f6rne\u011fin, MySQL, PostgreSQL, SQL Server).<\/li>\n<li>\u00c7e\u015fitli SQL sorular\u0131 \u00e7\u00f6zerek kendinizi test edin.  <a href=\"https:\/\/leetcode.com\/problemset\/database\/\">LeetCode<\/a> gibi platformlar pratik yapman\u0131z i\u00e7in harika kaynaklar sunar.<\/li>\n<li>\u00d6rnek veritabanlar\u0131 olu\u015fturun ve \u00fczerinde pratik yap\u0131n.<\/li>\n<li>M\u00fclakat sorular\u0131na yan\u0131t verirken a\u00e7\u0131k ve \u00f6z olun.  Kodunuzu ad\u0131m ad\u0131m a\u00e7\u0131klay\u0131n.<\/li>\n<li>Sorular\u0131 dikkatlice dinleyin ve sorular sorun.<\/li>\n<\/ul>\n<p>Unutmay\u0131n ki, pratikteki uzmanl\u0131\u011f\u0131n\u0131z kadar, SQL kavramlar\u0131n\u0131 ne kadar iyi anlad\u0131\u011f\u0131n\u0131z da \u00f6nemlidir.  Bu nedenle, sadece kod yazmakla kalmay\u0131n, ayn\u0131 zamanda kulland\u0131\u011f\u0131n\u0131z komutlar\u0131n mant\u0131\u011f\u0131n\u0131 da a\u00e7\u0131klayabilmelisiniz.<\/p>\n<p>Daha fazla bilgi i\u00e7in <a href=\"https:\/\/fatihsoysal.com\">fatihsoysal.com<\/a> sitesini ziyaret edebilirsiniz. Ba\u015far\u0131lar!<\/p>\n<p>#Etiketler<br \/>\nSQL, SQL M\u00fclakat Sorular\u0131, Veritaban\u0131, SQL \u00d6\u011frenme, M\u00fclakat Haz\u0131rl\u0131\u011f\u0131, SELECT, FROM, WHERE, JOIN, GROUP BY, HAVING, ORDER BY,  SQL Sorular\u0131, Ba\u015flang\u0131\u00e7 Seviyesi SQL<br \/>\n<\/body><br \/>\n<\/html><\/p>\n","protected":false},"excerpt":{"rendered":"Ba\u015flang\u0131\u00e7 Seviyesi SQL M\u00fclakat Sorular\u0131 ve Haz\u0131rl\u0131\u011f\u0131 Bir yaz\u0131l\u0131m geli\u015ftirici olarak kariyerinizde SQL&#8217;i bilmek olduk\u00e7a \u00f6nemlidir. Veri tabanlar\u0131yla&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":[1],"tags":[],"class_list":{"0":"post-14643","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-genel","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>Ba\u015flang\u0131\u00e7 Seviyesi SQL M\u00fclakat Sorular\u0131 ve Haz\u0131rl\u0131\u011f\u0131<\/title>\n<meta name=\"description\" content=\"Bir yaz\u0131l\u0131m geli\u015ftirici olarak kariyerinizde SQL&#039;i bilmek olduk\u00e7a \u00f6nemlidir. Veri tabanlar\u0131yla \u00e7al\u0131\u015fmak, hemen hemen her uygulamada ihtiya\u00e7 duyulan bir beceridir. Bu nedenle, SQL ile ilgili sorular bir\u00e7ok yaz\u0131l\u0131m geli\u015ftirme m\u00fclakat\u0131n\u0131n ayr\u0131lmaz bir par\u00e7as\u0131d\u0131r. \u00d6zellikle yeni ba\u015flayanlar i\u00e7in, m\u00fclakata haz\u0131rl\u0131kl\u0131 olmak ve ba\u015far\u0131l\u0131 olmak i\u00e7in en yayg\u0131n sorular\u0131 ve cevaplama stratejilerini bilmek hayati \u00f6nem ta\u015f\u0131r. Bu makalede, s\u0131k kar\u015f\u0131la\u015f\u0131lan SQL m\u00fclakat sorular\u0131n\u0131 ele alaca\u011f\u0131z ve ba\u015far\u0131l\u0131 bir m\u00fclakat i\u00e7in nas\u0131l haz\u0131rl\u0131k yapabilece\u011finizi a\u00e7\u0131klayaca\u011f\u0131z.\" \/>\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\/baslangic-seviyesi-sql-mulakat-sorulari-ve-hazirligi\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ba\u015flang\u0131\u00e7 Seviyesi SQL M\u00fclakat Sorular\u0131 ve Haz\u0131rl\u0131\u011f\u0131\" \/>\n<meta property=\"og:description\" content=\"Bir yaz\u0131l\u0131m geli\u015ftirici olarak kariyerinizde SQL&#039;i bilmek olduk\u00e7a \u00f6nemlidir. Veri tabanlar\u0131yla \u00e7al\u0131\u015fmak, hemen hemen her uygulamada ihtiya\u00e7 duyulan bir beceridir. Bu nedenle, SQL ile ilgili sorular bir\u00e7ok yaz\u0131l\u0131m geli\u015ftirme m\u00fclakat\u0131n\u0131n ayr\u0131lmaz bir par\u00e7as\u0131d\u0131r. \u00d6zellikle yeni ba\u015flayanlar i\u00e7in, m\u00fclakata haz\u0131rl\u0131kl\u0131 olmak ve ba\u015far\u0131l\u0131 olmak i\u00e7in en yayg\u0131n sorular\u0131 ve cevaplama stratejilerini bilmek hayati \u00f6nem ta\u015f\u0131r. Bu makalede, s\u0131k kar\u015f\u0131la\u015f\u0131lan SQL m\u00fclakat sorular\u0131n\u0131 ele alaca\u011f\u0131z ve ba\u015far\u0131l\u0131 bir m\u00fclakat i\u00e7in nas\u0131l haz\u0131rl\u0131k yapabilece\u011finizi a\u00e7\u0131klayaca\u011f\u0131z.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/fatihsoysal.com\/blog\/baslangic-seviyesi-sql-mulakat-sorulari-ve-hazirligi\/\" \/>\n<meta property=\"og:site_name\" content=\"Kodlar\u0131n Gizemli D\u00fcnyas\u0131\" \/>\n<meta property=\"article:published_time\" content=\"2025-03-09T03:15:15+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=\"3 dakika\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/baslangic-seviyesi-sql-mulakat-sorulari-ve-hazirligi\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/baslangic-seviyesi-sql-mulakat-sorulari-ve-hazirligi\/\"},\"author\":{\"name\":\"Fatih Soysal\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"headline\":\"Ba\u015flang\u0131\u00e7 Seviyesi SQL M\u00fclakat Sorular\u0131 ve Haz\u0131rl\u0131\u011f\u0131\",\"datePublished\":\"2025-03-09T03:15:15+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/baslangic-seviyesi-sql-mulakat-sorulari-ve-hazirligi\/\"},\"wordCount\":642,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"inLanguage\":\"tr\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/fatihsoysal.com\/blog\/baslangic-seviyesi-sql-mulakat-sorulari-ve-hazirligi\/#respond\"]}],\"copyrightYear\":\"2025\",\"copyrightHolder\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/baslangic-seviyesi-sql-mulakat-sorulari-ve-hazirligi\/\",\"url\":\"https:\/\/fatihsoysal.com\/blog\/baslangic-seviyesi-sql-mulakat-sorulari-ve-hazirligi\/\",\"name\":\"Ba\u015flang\u0131\u00e7 Seviyesi SQL M\u00fclakat Sorular\u0131 ve Haz\u0131rl\u0131\u011f\u0131\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#website\"},\"datePublished\":\"2025-03-09T03:15:15+00:00\",\"description\":\"Bir yaz\u0131l\u0131m geli\u015ftirici olarak kariyerinizde SQL'i bilmek olduk\u00e7a \u00f6nemlidir. 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