How can using SELECT * in PHP queries lead to issues and what are the alternatives?

Using SELECT * in PHP queries can lead to issues such as fetching unnecessary data, decreased performance due to fetching more columns than needed, and potential security vulnerabilities if sensitive data is inadvertently selected. To solve this issue, explicitly list the columns you want to retrieve in the SELECT statement. 

// Avoid using SELECT * and instead specify the columns you need
$sql = "SELECT column1, column2, column3 FROM table_name WHERE condition = 'value'";
$result = mysqli_query($conn, $sql);

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

Keywords

SELECT * security vulnerability SQL injection performance overhead alternative methods

Related Questions