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1) SELECT Deyimi

SELECT deyimi veritabanınızdaki herhangi bir tablodan istediğiniz verileri size listeleyen komuttur.
Select komutu sadece alanlara göre filtreleme yapar,örneğin “adı” bir alan(kolon,sütun)dır.
Kullanımı;

SELECT [Alan adı1],[Alan adı2]… FROM [Tablo Adı]

Örneğin şöyle bir tablomuz olsun;

Bu tablodaki alanlar resimde görüldüğü gibi “Adı”,”Soyadı” ve “Tel” dir.
Biz eğer bu tablodaki kayıtların sadece “Adı” ve “Soyadı” alanlarını listeleyelim komut satırımız şu şekilde olacaktır;

SELECT adı,soyadı FROM tablo1

Bütün kayıtları listelemek isterseniz

SELECT adı,soyadı,tel FROM tablo1

şeklinde yazarız ama sizin tablonuzda 3 değilde 100 alan olursa mantıken bu aptalca olur değil mi? işte bunun çözümü de şöyledir;

SELECT * FROM tablo1

Gördüğünüz gibi “*” tümü anlamını taşımaktadır.

Bu SQL satırını çalıştırdığımız zaman sonuç aşağıdaki gibi olacaktır;

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