What are the advantages of using "SELECT id" instead of "SELECT *" in database queries in PHP?

Using "SELECT id" instead of "SELECT *" in database queries in PHP can improve the performance of your application by reducing the amount of data fetched from the database. When you only select the specific columns you need, it can lead to faster query execution and less memory consumption. Additionally, it can make your code more readable and maintainable by explicitly stating which columns you are retrieving. 

// Using "SELECT id" instead of "SELECT *"
$query = "SELECT id FROM table_name";
$result = mysqli_query($connection, $query);

// Fetching the results
while ($row = mysqli_fetch_assoc($result)) {
    echo $row['id'] . "<br>";
}

Keywords

SELECT id SELECT * database queries PHP advantages

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