prioriterVenstreSideCrossJoin

                venstre høyre  priorterVenstreSideCrossJoin
    2020-01-01  +---+          +------------+
                | x |          | x          |
    2020-01-02  |   |   +---+  +------------+
                |   |   | 1 |  | x          |
    2020-01-03  +---+   |   |  +------------+
                        |   |  | 1          |
    2020-01-04          +---+  +------------+

    2020-01-05  +---+          +------------+
                | y |          | y          |
    2020-01-06  +---+          +------------+