What are the implications of using "SELECT * FROM" in SQL queries in PHP?

Using "SELECT * FROM" in SQL queries can lead to performance issues and inefficiencies, as it retrieves all columns from the table even if they are not needed. It is recommended to specify the specific columns needed in the query to optimize performance and reduce the amount of data transferred. 

// Specify the specific columns needed in the query instead of using SELECT *
$query = "SELECT column1, column2, column3 FROM table_name WHERE condition";
$result = mysqli_query($connection, $query);

// Example of fetching data from the result set
while ($row = mysqli_fetch_assoc($result)) {
    // Process the data here
}

Keywords

SQL queries SELECT * implications performance security

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