Actually it is returned 3 rows and 2 cols..

with started negative value mainvalue

We must or should be create database backups of model becuase we never can be happen it for advise

It has more that can't perform like:

Adding filegroups and Backing up or restoring the database

Good questions, it is very clear when you wrote statement

(if _statement) after that. If should be the first print. Because you mention before two insert statement, the last statement...

You can make if stamment

IF (SELECT COUNT(Months) FROM tablename

after

declare the amount of each months (you make specific that some months are different amounts)

begin and end store procedure...should be work...