查詢表結構select substr(table_name,1,20) tabname,
substr(column_name,1,20)column_name,
rtrim(data_type)'('data_length')' from system.dba_tab_columns
where owner='username'
表空間使用狀態select a.file_id "FileNo",a.tablespace_name "Tablespace_name",
round(a.bytes/1024/1024,4) "Total MB",
round((a.bytes-sum(nvl(b.bytes,0)))/1024/1024,4) "Used MB",
round(sum(nvl(b.bytes,0))/1024/1024,4) "Free MB",
round(sum(nvl(b.bytes,0))/a.bytes*100,4) "%Free"
from dba_data_files a, dba_free_space b
where a.file_id=b.file_id(+)
group by a.tablespace_name,
a.file_id,a.bytes order by a.tablespace_name 查詢某個模式下面數據不為空的表declare
Cursor c is select TNAME from tab;
vCount Number;
table_nm Varchar2(100);
sq varchar2(300);
begin
for r in c loop
table_nm:=r.TNAME;
sq:='select count(*) from ' table_nm;
execute immediate sq into vCount;
if vCount>0 then
dbms_output.put_line(r.tname);
end if;
end loop;
end; 客戶端主機信息SELECT
SYS_CONTEXT('USERENV','TERMINAL') TERMINAL,
SYS_CONTEXT('USERENV','HOST') HOST,
SYS_CONTEXT('USERENV','OS_USER') OS_USER,
SYS_CONTEXT('USERENV','ip_ADDRESS') IP_ADDRESS
FROM DUAL
查看回滾段名稱及大小COLUMN roll_name FORMAT a13 HEADING 'Rollback Name'
COLUMN tablespace FORMAT a11 HEADING 'Tablspace'
COLUMN in_extents FORMAT a20 HEADING 'Init/Next Extents'
COLUMN m_extents FORMAT a10 HEADING 'Min/Max Extents'
COLUMN status FORMAT a8 HEADING 'Status'
COLUMN wraps FORMAT 999 HEADING 'Wraps'
COLUMN shrinks FORMAT 999 HEADING 'Shrinks'
COLUMN opt FORMAT 999,999,999 HEADING 'Opt. Size'
COLUMN bytes FORMAT 999,999,999 HEADING 'Bytes'
COLUMN extents FORMAT 999 HEADING 'Extents'SELECT
a.owner '.' a.segment_name roll_name
, a.tablespace_name
tablespace
, TO_CHAR(a.initial_extent) ' / '
TO_CHAR(a.next_extent) in_extents
, TO_CHAR(a.min_extents) ' / '
TO_CHAR(a.max_extents) m_extents
, a.status status
, b.bytes bytes
, b.extents extents
, d.shrinks shrinks
, d.wraps wraps
, d.optsize opt
FROM
dba_rollback_segs a
, dba_segments b
, v$rollname c
, v$rollstat d
WHERE
a.segment_name = b.segment_name
AND a.segment_name = c.name (+)
AND c.usn = d.usn (+)
ORDER BY a.segment_name;
