Oracle 11g: USER_TAB_PRIVS and ALL_TAB_PRIVS

SQL> SET LINESIZE 400SQL> SET PAGESIZE 400SQL> SELECT * FROM USER_TAB_PRIVS WHERE GRANTEE='XIAYE';GRANTEE                        OWNER                          TABLE_NAME                     GRANTOR                PRIVILEGE                                GRA HIE------------------------------ ------------------------------ ------------------------------ ------------------------------ ---------------------------------------- --- ---XIAYE                          SYS                            SHIPS                          SYS                    UPDATE                                   NO  NOXIAYE                          SYS                            SHIPS                          SYS                    SELECT                                   NO  NOXIAYE                          SYS                            SHIPS                          SYS                    INSERT                                   NO  NOXIAYE                          SYS                            SHIPS                          SYS                    DELETE                                   NO  NOSQL> SELECT * FROM ALL_TAB_PRIVS WHERE GRANTEE='XIAYE';GRANTOR                        GRANTEE                        TABLE_SCHEMA                   TABLE_NAME                     PRIVILEGE                                GRA HIE------------------------------ ------------------------------ ------------------------------ ------------------------------ ---------------------------------------- --- ---SYS                            XIAYE                          SYS                            SHIPS                  UPDATE                                   NO  NOSYS                            XIAYE                          SYS                            SHIPS                  SELECT                                   NO  NOSYS                            XIAYE                          SYS                            SHIPS                  INSERT                                   NO  NOSYS                            XIAYE                          SYS                            SHIPS                  DELETE                                   NO  NO