primary key
CREATE TABLE Persons (
Rollno int NOT NULL,
FirstName varchar(255),
LastName varchar(255),
Age int,
PRIMARY KEY (ID)
);primary key
CREATE TABLE Persons (
Rollno int NOT NULL,
FirstName varchar(255),
LastName varchar(255),
Age int,
PRIMARY KEY (ID)
);primary key
Primary Key :
It is unique column in every table in a database
It can ONLY accept;
- nonduplicate values
- cannot be NULLCopyright © 2021 Codeinu
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