I am trying to do something like this but am having trouble putting it into oracle coding.
BEGIN
IF ((SELECT complete_date FROM task_table WHERE task_id = 1) IS NULL)
THEN
UPDATE task_table SET complete_date = //somedate WHERE task_id = 1;
ELSE
UPDATE task_table SET complete_date = NULL;
END IF;
END;
But this does not work. I also tried
IF EXISTS(SELECT complete_date FROM task_table WHERE task_id = 1)
with no luck.
I don't think you'd need the procedural block if your actual logic is like the one above.
Assuming this is your task:
"if the value of complete_date for id 1 is NULL, update it with XXX. Otherwise set it to null".
You could just run ...
Update task_table
set complete_date = nvl2(complete_date,NULL, <**your date**>)
where task_id = 1;
This will only update those records where the complete_date is null with your new date.
What is the intention of this part?
IF ((SELECT complete_date FROM task_table WHERE task_id = 1) IS NULL)
Is it to find if there are rows where complete_date is null and task_id = 1?
Or is it to check if there are no rows where task_id = 1?
