How to commit and rollback transaction in sql server?

Question

I have a huge script for creating tables and porting data from one server. So this sceipt basically has -

1. Create statements for tables.
2. Insert for po

Answer 1

As per http://msdn.microsoft.com/en-us/library/ms188790.aspx

@@ERROR: Returns the error number for the last Transact-SQL statement executed.

You will have to check after each statement in order to perform the rollback and return.

Commit can be at the end.

HTH