PL/SQL CASE WHEN Kullanımı

Merhaba Arkadaşlar,
PL/SQL ‘de Case kullanımı aşağıdaki bir select sorgusu ile örneklenmiştir.
Select
             (
 Case When Sayi=1 THEN ‘Birinci Sayi’
When Sayi=2 THEN ‘İkinci Sayi’
When Sayi=3 THEN ‘Üçüncü Sayi’
When Sayi=4 THEN ‘Dördüncü Sayi’
          end    ) as Sayici,
Sayi
from
Sayisiz
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