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-- ORDER BY : Donen Sonuclari Bir Yada
-- Birden Cok Kolona Göre Sıralama

select * from kisiler;

-- Kişileri ID Kolonuna Gore Büyükten Küçüğe Sırala
select * from kisiler order by id desc;

-- Kişileri Gençten, Yaşlıya Doğru Getir
select * from kisiler order by yas asc;

-- Kişileri Gençten Yaşlıya ve Kiloya Göre Getir
select * from kisiler order by yas asc, kg desc;

-- Limit : SELECT SORGUSU SONUCUNDA
-- DONEN KAYIT MİKTARINI SINIRLAR

-- 3 Kişi Göster
select * from kisiler limit 3;

-- 0,3 Arası Kişiler
select * from kisiler limit 0,3;
select * from kisiler limit 3,3;
select * from kisiler limit 6,3;

-- Kişiler Tablosundan Random 3 Kişi Seç
select * from kisiler order by random() limit 3;

-- GROUP BY : Kayitlari Gruplar
select * from kisiler GROUP BY yas;

-- AGGREGATE FONKSIYONLAR
-- BU FONKSİYONLAR HER ZAMAN AMA HER ZAMAN
-- SONUCU TEK SATIR | TEK KOLON OLARAK DÖNERLER
-- min, max, sum, avg, count

-- Tablodaki Yaşların Toplamı
select sum(yas) as 'Yaslar Toplami' from kisiler;

-- Kişi Sayisi
select count(*) as 'Kisi Sayisi' from kisiler;

-- Kiloların Ortalaması
select avg(kg) as 'KG Ortalama' from kisiler;

-- En Buyuk ve En Kucuk Id
select max(id) as 'MAX ID', min(id) as 'MIN ID' from kisiler;

-- AGGREGATE FONKSIYONLARI SORGU KOSULU OLARAK
-- KULLANMAK ICIN NESTED QUERY IC ICE SORGULAR YAZILIR
select * from kisiler where yas >=
(select avg(yas) from kisiler);

-- Yaslara Gore, Boylarin Ortalamalarini Goster
select yas, avg(boy) as 'Boy Ortalmasi'
from kisiler group by yas;


-- IN Kullanımı : Değerin Bir Grup İçin Olması
-- ID si 1,2, 4, 7 veya 9 olacak

select * from kisiler where id in (1,2,4,7,9);

-- ID si 2,3 veya 5 olmayan kayıtları getir
select * from kisiler where id not in (2,3,5);

-- LIKE Bir kolondaki Değerin Başlangıcı, Bitisi Veya
-- Belli Sartlara Uymasını Kontrol Eder

-- Adında c Harfi Geçen Kişileri Listele
select * from kisiler where ad like '%c%';

-- Adı S Harfi İle Başlayan Kişileri Listele
select * from kisiler where ad like 'S%';

-- Soyadi s ile biten kisileri listele
select * from kisiler where soyad like '%s';

-- Adı 4 Karakter Olan Kisileri Listele
select * from kisiler where ad like '____';


-- Adı 3 Harfli, Bas Harfi C, Son Harfi N Olan
-- kisileri listele
select * from kisiler where ad like 'S__t';


     
 
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