{"id":12598,"date":"2025-02-16T04:15:13","date_gmt":"2025-02-16T01:15:13","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/kqlde-distinct-ve-project-operatorleri-karsilastirmasi\/"},"modified":"2025-02-16T04:15:13","modified_gmt":"2025-02-16T01:15:13","slug":"kqlde-distinct-ve-project-operatorleri-karsilastirmasi","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/kqlde-distinct-ve-project-operatorleri-karsilastirmasi\/","title":{"rendered":"KQL’de distinct ve project Operat\u00f6rleri Kar\u015f\u0131la\u015ft\u0131rmas\u0131"},"content":{"rendered":"

<\/p>\n

KQL’de distinct ve project Operat\u00f6rleri Kar\u015f\u0131la\u015ft\u0131rmas\u0131<\/p>\n

Kusto Query Language (KQL), Azure Data Explorer gibi b\u00fcy\u00fck veri platformlar\u0131nda g\u00fc\u00e7l\u00fc sorgulamalar yapmam\u0131z\u0131 sa\u011flayan bir dildir. Bu dilde, verileri filtrelemek ve \u015fekillendirmek i\u00e7in bir\u00e7ok operat\u00f6r bulunur. Bunlardan ikisi, s\u0131kl\u0131kla kar\u0131\u015ft\u0131r\u0131lan ve benzer i\u015flevlere sahip gibi g\u00f6r\u00fcnen distinct<\/code> ve project<\/code> operat\u00f6rleridir. Ancak, aralar\u0131ndaki ince farklar, sorgu performans\u0131n\u0131z\u0131 ve sonu\u00e7lar\u0131n\u0131z\u0131 \u00f6nemli \u00f6l\u00e7\u00fcde etkileyebilir. Bu makalede, bu iki operat\u00f6r\u00fcn \u00f6zelliklerini detayl\u0131 olarak inceleyecek ve hangi durumda hangisinin kullan\u0131lmas\u0131 gerekti\u011fini a\u00e7\u0131klayaca\u011f\u0131z.<\/p>\n

distinct Operat\u00f6r\u00fc<\/h2>\n

distinct<\/code> operat\u00f6r\u00fc, bir tabloda belirtilen s\u00fctun(lar) i\u00e7in benzersiz de\u011ferleri d\u00f6nd\u00fcr\u00fcr. Ba\u015fka bir deyi\u015fle, ayn\u0131 de\u011fere sahip sat\u0131rlar\u0131 tek bir sat\u0131ra indirger. \u00d6rne\u011fin, bir “\u00dcr\u00fcn” tablosunda ayn\u0131 \u00fcr\u00fcn ad\u0131 ile birden fazla kay\u0131t varsa, distinct \u00dcr\u00fcnAd\u0131<\/code> sorgusu sadece benzersiz \u00fcr\u00fcn isimlerini i\u00e7eren bir sonu\u00e7 k\u00fcmesi \u00fcretir. Bu operat\u00f6r, \u00f6zellikle belirli bir s\u00fctun i\u00e7indeki benzersiz de\u011ferleri saymak veya listelemek istedi\u011finizde olduk\u00e7a faydal\u0131d\u0131r. \u00d6rne\u011fin, ka\u00e7 farkl\u0131 \u00fcr\u00fcn t\u00fcr\u00fcm\u00fcz oldu\u011funu \u00f6\u011frenmek i\u00e7in | distinct \u00dcr\u00fcnAd\u0131 | count<\/code> sorgusunu kullanabiliriz. Ayr\u0131ca, distinct<\/code> operat\u00f6r\u00fc, sadece belirtilen s\u00fctunlara odaklan\u0131r, di\u011fer s\u00fctunlardaki verileri dikkate almaz. Bu, verilerin daha kompakt bir \u015fekilde sunulmas\u0131n\u0131 sa\u011flar.<\/p>\n

\n\u00dcr\u00fcnler\n| distinct \u00dcr\u00fcnAd\u0131\n<\/code><\/pre>\n
project Operat\u00f6r\u00fc<\/h2>\n
project<\/code> operat\u00f6r\u00fc ise, bir tablodaki belirtilen s\u00fctunlar\u0131 se\u00e7erek yeni bir tablo olu\u015fturur.  Bu, verilerin \u00f6zelle\u015ftirilmesi ve gereksiz s\u00fctunlar\u0131n kald\u0131r\u0131lmas\u0131 i\u00e7in kullan\u0131l\u0131r.  distinct<\/code>‘ten farkl\u0131 olarak,  project<\/code>, t\u00fcm sat\u0131rlar\u0131 korur.  Sadece,  belirtilen s\u00fctunlar d\u0131\u015f\u0131nda kalan s\u00fctunlar\u0131 atar.  Dolay\u0131s\u0131yla,  bir tabloda bir\u00e7ok s\u00fctun varsa ve sadece belli ba\u015fl\u0131 s\u00fctunlarla ilgileniyorsan\u0131z, project<\/code> operat\u00f6r\u00fc ile daha verimli bir sorgu olu\u015fturabilirsiniz. \u00d6rne\u011fin,  bir “Sipari\u015fler” tablosundan sadece Sipari\u015fID ve Tarih s\u00fctunlar\u0131n\u0131 se\u00e7mek i\u00e7in  | project Sipari\u015fID, Tarih<\/code> sorgusunu kullanabiliriz.  Bu,  sorgunun i\u015flem s\u00fcresini k\u0131salt\u0131r ve sadece gerekli verileri d\u00f6nd\u00fcr\u00fcr.<\/p>\n
\nSipari\u015fler\n| project Sipari\u015fID, Tarih\n<\/code><\/pre>\n
distinct ve project’in Birlikte Kullan\u0131m\u0131<\/h2>\n
\u0130ki operat\u00f6r\u00fcn birlikte kullan\u0131m\u0131, daha karma\u015f\u0131k sorgulamalar olu\u015fturmak i\u00e7in olduk\u00e7a g\u00fc\u00e7l\u00fc bir ara\u00e7t\u0131r.  \u00d6rne\u011fin,  bir tabloda belirli bir s\u00fctun i\u00e7in benzersiz de\u011ferleri bulmak ve bu de\u011ferlere ait di\u011fer s\u00fctunlar\u0131 da g\u00f6rmek istiyorsan\u0131z, \u00f6nce distinct<\/code> kullanarak benzersiz sat\u0131rlar\u0131 se\u00e7ebilir, daha sonra project<\/code> ile  gerekli s\u00fctunlar\u0131 se\u00e7ebilirsiniz. Bu durum, performans\u0131 art\u0131rabilir ve istenen sonu\u00e7lar\u0131 daha etkili bir \u015fekilde elde etmenizi sa\u011flar. Anca  s\u0131ralama \u00f6nemliyse, bu durumlarda  summarize<\/code>  operat\u00f6r\u00fcn\u00fcn kullan\u0131lmas\u0131 daha etkili olabilir.<\/p>\n
\n\u00dcr\u00fcnler\n| distinct \u00dcr\u00fcnAd\u0131, \u00dcr\u00fcnKategorisi\n| project \u00dcr\u00fcnAd\u0131, \u00dcr\u00fcnKategorisi\n<\/code><\/pre>\n
Sonu\u00e7<\/h2>\n
Hem distinct<\/code> hem de project<\/code>, KQL’de veri manip\u00fclasyonu i\u00e7in \u00f6nemli operat\u00f6rlerdir.  Ancak, ama\u00e7lar\u0131 farkl\u0131d\u0131r.  distinct<\/code> benzersiz de\u011ferleri se\u00e7erken, project<\/code> belirli s\u00fctunlar\u0131 se\u00e7er.  Hangi operat\u00f6r\u00fcn kullan\u0131laca\u011f\u0131, sorgu gereksinimlerine ba\u011fl\u0131d\u0131r.  Do\u011fru operat\u00f6r\u00fcn se\u00e7imi, sorgu performans\u0131n\u0131 ve netli\u011fini art\u0131r\u0131r.  Bu makalede verilen \u00f6rnekler, bu iki operat\u00f6r\u00fcn kullan\u0131m\u0131n\u0131 ve aralar\u0131ndaki farklar\u0131 daha iyi anlaman\u0131za yard\u0131mc\u0131 olacakt\u0131r.  Daha fazla bilgi i\u00e7in fatihsoysal.com<\/a> adresini ziyaret edebilirsiniz.<\/p>\n
Daha fazla KQL \u00f6\u011frenmek i\u00e7in  Microsoft KQL dok\u00fcmantasyonuna<\/a> g\u00f6z atabilirsiniz.<\/p>\n
#Etiketler: KQL, distinct, project, Azure Data Explorer, veri analizi, sorgu optimizasyonu, benzersiz de\u011ferler, s\u00fctun se\u00e7imi, Kusto Query Language,  fatihsoysal.com
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