In what scenarios would using a SELECT count(*) query be more efficient and appropriate than a SELECT * query in PHP?

Using a SELECT count(*) query would be more efficient and appropriate when you only need to retrieve the total number of rows that match a certain condition, rather than retrieving all the columns of the matching rows. This can help reduce the amount of data transferred between the database and the PHP application, resulting in faster query execution and improved performance. 

// Using a SELECT count(*) query to retrieve the total number of rows that match a condition
$query = "SELECT count(*) as total_rows FROM table_name WHERE column_name = 'value'";
$result = $conn->query($query);
$row = $result->fetch_assoc();
$total_rows = $row['total_rows'];

echo "Total rows that match the condition: " . $total_rows;

Keywords

SELECT count(*) SELECT * efficiency appropriate scenarios

Related Questions