namespace Glued\Lib;
use Glued\Lib\QueryInterface;
// $query_string = (new \Glued\Lib\QueryBuilder())->insert('table')->columns2( 'col1', 'col2')->upsert2('col2');
// use columns,upsert for named parameters, and columns2,upsert2 for unnamed parameters.
// TODO consider having only columns, not columns2 - use named vs. unnamed paramteres based on initialiyation of the QueryBuilder.
class QueryInsert implements QueryInterface
{
/**