how to assign auto increment in sql server code example

Example 1: how to auto increment in sql

CREATE TABLE Persons (
    Personid int NOT NULL AUTO_INCREMENT,
    LastName varchar(255) NOT NULL,
    FirstName varchar(255),
    Age int,
    PRIMARY KEY (Personid)
);
INSERT INTO Persons (FirstName,LastName)
VALUES ('Lars','Monsen');

Example 2: what is auto increment in sql

Autoincrement keyword allows the
user to create a unique number to get
generated whenever a new record is
inserted into the table.
This keyword is usually required 
whenever PRIMARY KEY in SQL is used.

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