How to test if a column definition allows nulls? I have a table with roughly 3000 rows in it and I need to modify a column definition to allow nulls. I have a change script that will perform the change but I would like to be able to re-run the script so that the change will only occur if the column definition hasn't already been changed. How do I test a column definition to identify if the column is NULL or NOT NULL?
You can also look at sys.columns.is_nullable ...