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1.commit;rollback;
2.select * from dictionary;
describe dba_users;
select * from dba_users;
select name from v$controlfile;
3.
alter database drop logfile group 3
select archiver from v$instance;
alter tablespace userdata read only;
4.
select tablespace_nam ......
SELECT ID,
col_name,
SUBSTR(col_name, 1, INSTR(col_name || ',', ',', 1, 1) - 1) C1,
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* start Oracle *
set noexec_user_stack=1
set msgsys:msginfo_msgmax=65535
set msgsys:msginfo_msgmnb=65535
set msgsys:msginfo_msgmap=258
set msgsys:msginfo_msgmni=1792
set msgsys:msginfo_msgssz=32
set msgsys:msginfo_msgtql=1792
set msgsys:msginfo_msgseg=32767
set shmsys:shminfo_shmmax=4294967 ......