Gurus, 1. How does one know that there is a tablepspace fragemntion and once detected how do we remove that. 2. What are chained rows? 3. While doing an export what does compress = y and consistent = y means? 4. What does analyze tablespace with % does? 5. Why is the purpose of repository in OEM? Would appreciate an answer on these. TIA Vinod. -- //www.freelists.org/webpage/oracle-l