What are the potential performance implications of using multiple SQL queries with joins versus a single SQL query with calculations in PHP?

Using multiple SQL queries with joins can result in increased network traffic and database load compared to a single SQL query with calculations performed in PHP. This can lead to slower performance and decreased efficiency, especially when dealing with large datasets. To improve performance, it is recommended to utilize a single SQL query with calculations in PHP to minimize database interactions. 

// Single SQL query with calculations in PHP
$query = "SELECT SUM(column1) AS total_column1, AVG(column2) AS avg_column2 FROM table_name";
$result = mysqli_query($connection, $query);

if($result){
    $row = mysqli_fetch_assoc($result);
    $total_column1 = $row['total_column1'];
    $avg_column2 = $row['avg_column2'];
    
    // Perform calculations or operations with the retrieved values
}

Keywords

SQL queries joins calculations performance implications PHP.

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