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select *from Calisanlar --116
select *from Etkiler --51
select *from Hekimler --66
select *from Ilaclar --52
select *from Musteriler --131
select *from Receteler --57
select *from Stoklar --52
select *from Tedarikciler --36
select *from Turler --9
select Count(Fiyat) from Ilaclar -- Sutundaki veri olup olmamasıyla ilgilenir dolu olanların sayısını alır.
select distinct(Fiyat) from Ilaclar -- İlaçlar tablosundaki Fiyatı sutunuu farklı değerleri listeler
select IlacAdi, Distinct(Fiyat) from Ilaclar-- Hata veririr yazılmaz
select IlacAdi, Count(Fiyat) from Ilaclar-- Hata veririr yazılmaz
select IlacAdi, sum(Fiyat) from Ilaclar -- Hata veririr yazılmaz
/*Sum avg count distinct aggregate fonklar farklı bir sütunla listelenmez*/
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