Adding a column to a table in SQL

Question

My problem is a bit more complex, but I want to try and figure it out piece by piece. First, a table gets pulled into a temporary table ("data" table to "#r1" table). Second, another table gets pulled into a separate temp table ("data2" table into "#r2"). Finally, the temporary tables are combined into a third table (join where blah, blah, blah).
Okay, here is problem: both tables contain a date column, "data" has actual dates and "data2" has NULL values (which is okay). I want to add a column to the end of the third table; if there is a NULL value in the date, place a "0" (zero), if it has an actual date (example, 5/5/08), place a "1".
How do you solve this? I've tried and keep getting errors further down the code.

Answer 1

Okay, cool, thanks Frank. Now it moves on...the third table that I was talking about gets used multiple times down the code; do I have to modify every procedure that extracts from this table? Because the table that I need to have it show the last column result ("0" or "1") is actually four tables down into the code (each time the table is transferred and renamed). It goes from the raw data into temporary tables, then into permanent tables, back to temporary tables, and finally into my end result.
By the way, I didn't write this original code, someone else did and now I'm stuck trying to modify it.