How can I obtain the inclusive end time of a time-window generated by the window or session_window functions in Databricks SQL, using the window_time function?
To obtain the inclusive end time of a time-window generated by the window or session_window functions in Databricks SQL, you can use the window_time function. The syntax for using this function is `window_time(window)`, where `window` is a window column generated by the window or session_window functions.

The function returns a TIMESTAMP value with the inclusive endpoint of the window, which is equivalent to `window.end - INTERVAL '0.000001' SECOND`.

Here's an example of how to use the window_time function:

```sql
SELECT a, window.start as start, window.end as end, window_time(window), cnt 
FROM (
  SELECT a, window, count(*) as cnt 
  FROM VALUES ('A1', '2021-01-01 00:00:00'), ('A1', '2021-01-01 00:04:30'), ('A1', '2021-01-01 00:06:00'), ('A2', '2021-01-01 00:01:00') 
  AS tab(a, b) 
  GROUP by a, window(b, '5 MINUTES')
) 
ORDER BY a, window.start;
```

In this example, the window_time function is used to obtain the inclusive end time of the time-window generated by the window function. The resulting table includes the start and end times of each window, as well as the count of rows within each window.