To rename objects in SQL SERVER just use the sp_rename stored procedure.
Syntax
sp_rename [ @objname = ] 'object_name' , [ @newname = ] 'new_name'
[ , [ @objtype = ] 'object_type' ]
Here are the possible values for objtype
| Value | Description |
|---|---|
| COLUMN | A column to be renamed. |
| DATABASE | A user-defined database. This object type is required when renaming a database. |
| INDEX | A user-defined index. |
| OBJECT | An item of a type tracked in . For example, OBJECT could be used to rename objects including constraints (CHECK, FOREIGN KEY, PRIMARY/UNIQUE KEY), user tables, and rules. |
| USERDATATYPE | Anoradded by executingor. |
For more info goto microsoft