Simple Oracle variable SQL Assignment

Question

Despite having spent an hour researching I can\'t seem to figure out how to correctly define a variable and then use it in your SQL.

This is what I have so far produ

Answer 1

This is an old post, but in case anyone stumbles on this (as I just did), you can handle this with a CTE:

with params as (
      select date '2011-11-03' as startdate
      from dual
     )
select . . .
from params cross join
     . . .

Almost the same syntax works in SQL Server (minus the date-specific stuff and from dual).