drop database link
drop snapshot
drop snapshot log
explain
lock table
rename
set constraints
set role
set transaction
确保主数据库中的表行是可以唯一确认的(即有表中有主键)
找出没有主键的表:
sql> select owner, table_name, bad_column from dba_logstdby_not_unique
2> where table_name not in (select table_name from dba_logstdby_unsupported);
owner table_name b
------------------------------ ------------------------------ -
outln ol$hints n
outln ol$nodes n
system mview$_adv_basetable n
system mview$_adv_sqldepend n
system mview$_adv_filterinstance n
