What is the importance of assigning a primary key, such as an auto_increment integer, to each database table?

Assigning a primary key, such as an auto_increment integer, to each database table is important because it uniquely identifies each row in the table. This ensures that each record can be easily referenced and updated without ambiguity. It also helps improve the performance of database operations, such as searching and sorting, as the primary key is indexed by default. 

CREATE TABLE users (
    id INT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(50),
    email VARCHAR(50)
);

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primary key auto_increment database table importance PHP

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