1) Check Metalink Note:182699.1

2) Rebuild or Coalesce?

3) Compare costs

4) Taking an export of the owning schema or database, specifying ROWS=NO so that data within the database is not exported, and then using the import with the option INDEXFILE will produce a file listing all of the commands to build the indexes.


PS: You can use the "COMPUTE STATISTICS" option on the CREATE or ALTER INDEX commands.