--1、查看表空間的名稱及大小?
SELECT t.tablespace_name, round(SUM(bytes / (1024 * 1024)), 0) ts_size?
FROM dba_tablespaces t, dba_data_files d?
WHERE t.tablespace_name = d.tablespace_name?
GROUP BY t.tablespace_name;?
--2、查看表空間物理文件的名稱及大小?
SELECT tablespace_name,?
file_id,?
file_name,?
round(bytes / (1024 * 1024), 0) total_space?
FROM dba_data_files?
ORDER BY tablespace_name;?
--3、查看回滾段名稱及大小?
SELECT segment_name,?
tablespace_name,?
r.status,?
(initial_extent / 1024) initialextent,?
(next_extent / 1024) nextextent,?
max_extents,?
v.curext curextent?
FROM dba_rollback_segs r, v$rollstat v?
WHERE r.segment_id = v.usn(+)?
ORDER BY segment_name;?
--4、查看控制文件?
SELECT NAME FROM v$controlfile;?
--5、查看日志文件?
SELECT MEMBER FROM v$logfile;?
--6、查看表空間的使用情況?
SELECT SUM(bytes) / (1024 * 1024) AS free_space, tablespace_name?
FROM dba_free_space?
GROUP BY tablespace_name;?
SELECT a.tablespace_name,?
a.bytes total,?
b.bytes used,?
c.bytes free,?
(b.bytes * 100) / a.bytes "% USED ",?
(c.bytes * 100) / a.bytes "% FREE "?
FROM sys.sm$ts_avail a, sys.sm$ts_used b, sys.sm$ts_free c?
WHERE a.tablespace_name = b.tablespace_name?
AND a.tablespace_name = c.tablespace_name;?
--7、查看數據庫庫對象?
SELECT owner, object_type, status, COUNT(*) count#?
FROM all_objects?
GROUP BY owner, object_type, status;?
--8、查看數據庫的版本　?
SELECT version?
FROM product_component_version?
WHERE substr(product, 1, 6) = 'Oracle';?
--9、查看數據庫的創建日期和歸檔方式?
SELECT created, log_mode, log_mode FROM v$database;?
--1G=1024MB?
--1M=1024KB?
--1K=1024Bytes?
--1M=11048576Bytes?
--1G=1024*11048576Bytes=11313741824Bytes?
SELECT a.tablespace_name "表空間名",?
total "表空間大小",?
free "表空間剩余大小",?
(total - free) "表空間使用大小",?
total / (1024 * 1024 * 1024) "表空間大小(G)",?
free / (1024 * 1024 * 1024) "表空間剩余大小(G)",?
(total - free) / (1024 * 1024 * 1024) "表空間使用大小(G)",?
round((total - free) / total, 4) * 100 "使用率 %"?
FROM (SELECT tablespace_name, SUM(bytes) free?
FROM dba_free_space?
GROUP BY tablespace_name) a,?
(SELECT tablespace_name, SUM(bytes) total?
FROM dba_data_files?
GROUP BY tablespace_name) b?
WHERE a.tablespace_name = b.tablespace_name?

總結

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