SQKK>select blocks FROM user_segments WHERE segment_name=’ALTB’;

SQKK>select blocks FROM user_segments WHERE segment_name=’ALTB’; 　　#BLOCKS 　　--------------- 　　#704 　　 　　SQL>ALTER TABLE altb SHRINK　SOACE CINOACT; 　　Table altered 　　SQL>select blocks FROM user_segments WHERE segment_name=’ALTB’; 　　 　　#BLOCKS 　　------------ 　　#704 　　 　　why does the number of blocks for the table remain the sale after the shrink operation?

A.Because the table did not contain migrated or chained rows

B.Because the row Ids remain the same for all rows during the shrink operation

C.Because the progress of the shrink operation is not saved in the bitmap blocks of the table

D.Because the high-water mark(HWM.did not move due to the CoMPACT option that is used in the shrink operation

正确答案是D