use envisage
go

begin tran

if exists (select * from sys.all_columns where name like 'CreatorId' and object_id like OBJECT_ID('[Scenario]'))
begin
ALTER TABLE [Scenario] DROP COLUMN CreatorId
end

if exists (select * from sys.all_columns where name like 'ModifiedById' and object_id like OBJECT_ID('[Scenario]'))
begin
ALTER TABLE [Scenario] DROP COLUMN ModifiedById
end

commit tran