在KSQL中，如何在窗口化和分组后选择最大窗口记录？

Question

ksql> CREATE TABLE HOPPING_TABLE AS SELECT ID, WINDOWSTART() AS WINSTART, COUNT(*) AS CNT FROM MY_STREAM HOPPING WINDOW (SIZE 30 DAYS, ADVANCED BY 1 DAYS) GROUP BY ID;

ksql> SELECT ID, WINSTART, CNT FROM HOPPING_TABLE;

id                    winstart        cnt
-------------------------------------------

874163197805291909    1547164800000    23
874163197805291909    1547424000000    11
874163197805291909    1547510400000    26
874163197805291909    1547683200000    12

660071199310134801    1545868800000    6
660071199310134801    1546560000000    7
660071199310134801    1547251200000    3

现在，我只关心每个ID分组的具有最大winstart值的window的cnt，那么如何通过KSQL实现呢？ 考虑到上面的示例（将2个ID分组），希望从上面的HOPPING TABLE生成具有以下记录的表：

id                    winstart        cnt
-------------------------------------------

874163197805291909    1547683200000    12

660071199310134801    1547251200000    3