Table-Names can now also be arrays

Now you can do this:

$select
->field('a.a')
->field('b.b')
->from('a', [['a' => 1, 'b' => 3], ['a' => 2, 'b' => 2], ['a' => 3, 'b' => 1]])
->joinInner('b', [['a' => 1, 'b' => 3], ['a' => 2, 'b' => 2], ['a' => 3, 'b' => 1]])

Which will result in this:

SELECT
    a.a,
    b.b
FROM
    (SELECT '1' AS `a`, '3' AS `b`
    UNION
    SELECT '2' AS `a`, '2' AS `b`
    UNION
    SELECT '3' AS `a`, '1' AS `b`) a
INNER JOIN
    (SELECT '1' AS `a`, '3' AS `b`
    UNION
    SELECT '2' AS `a`, '2' AS `b`
    UNION
    SELECT '3' AS `a`, '1' AS `b`) b