how to create a column that can be used as a primary key auto incrementing in sql code example

Example 1: sql query to make a existing column auto increment

Alter table table_name modify column_name datatype(length) AUTO_INCREMENT PRIMARY KEY

Example 2: create table with primary key auto increment in sql

CREATE TABLE table_name (
    id INT NOT NULL IDENTITY(1, 1),
    name NVARCHAR (100) NULL,
    school NVARCHAR (100) NULL,
    PRIMARY KEY (ID)
);

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