Why is it recommended to separate deletion and insertion operations into separate MySQL queries in PHP?

It is recommended to separate deletion and insertion operations into separate MySQL queries in PHP to ensure data integrity and prevent unintended consequences. By executing each operation separately, you can handle errors more effectively and avoid unexpected behavior. This practice also makes the code more readable and maintainable. 

// Separate deletion and insertion operations into two separate queries
$deleteQuery = "DELETE FROM table_name WHERE condition";
$insertQuery = "INSERT INTO table_name (column1, column2) VALUES (value1, value2)";

// Execute deletion query
$resultDelete = mysqli_query($conn, $deleteQuery);

// Check if deletion was successful before executing insertion query
if ($resultDelete) {
    $resultInsert = mysqli_query($conn, $insertQuery);
    
    if ($resultInsert) {
        echo "Data deleted and inserted successfully.";
    } else {
        echo "Error inserting data: " . mysqli_error($conn);
    }
} else {
    echo "Error deleting data: " . mysqli_error($conn);
}

Keywords

MySQL PHP deletion insertion queries

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