What are the drawbacks of using a "Select *" query to fetch data from a database in PHP?

Using a "Select *" query to fetch data from a database in PHP can lead to performance issues and potential security vulnerabilities. It is recommended to explicitly specify the columns you want to retrieve to avoid fetching unnecessary data and to prevent SQL injection attacks. 

// Specify the columns you want to retrieve instead of using "Select *"
$sql = "SELECT column1, column2, column3 FROM table_name";
$result = mysqli_query($conn, $sql);

// Fetch data from the result set
while($row = mysqli_fetch_assoc($result)) {
    // Process the retrieved data
}

Keywords

Select * query fetch data database drawbacks

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