Answers for "unique key libere"

SQL
0

unique key

CREATE TABLE students  
(  
S_Id int NOT NULL,  
LastName varchar (255) NOT NULL,  
FirstName varchar (255),  
City varchar (255),  
UNIQUE (S_Id)  
)
Posted by: Guest on October-07-2020
0

unique key

Unique Key:
Only unique value and also can contain NULL
Posted by: Guest on January-27-2021

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