>>>Hi,
>>>
>>>How do you update a database structure (default keys, constraint, etc) installed on the customer site with the changes you have made to your copy of SQL Server database? That is, I understand that I have to create some script and send it to the customer and instruct them to run this script, correct? How do you create such a script? TIA.
>>
>>There is always ALTER TABLE. (In a script, as Bruce says).
>
>As Sergey said that not all changes can be done with the ALTER TABLE. And I am sure sooner or later I will run into such a situation. Then I will have to find another way of synchronizing mine and the customer's databases.

Creating indexes is not part of ALTER TABLE command (It's CREATE INDEX command).