I've used the advanced configuration option for other variables, but in this case I wanted something dynamic. I want to `SET startDate = current_time()` and then use `startDate` through all my queries to make sure they are all using the same time comparison in their queries.

Here's the documentation that shows using "SET" as I did in the initial question. https://docs.databricks.com/en/delta-live-tables/sql-ref.html#set-configuration-values-for-a-table-o...