1.查看某用户下所有对象的信息:SELECT owner, object_type, status, COUNT(*) count# FROM all_objects where owner="xxx" GROUP BY owner, object_type, status order by 2;2.查看表行数(多个表)(需先分析表):1 select "analyze table "|| table_name||" compute statistics;" from user_tables; 2 3 select table_name,num_rows from dba_tables where owner="WEBAGENT" order by 1; 4 5 select count(*) from WITHDRAWAL_ORG;3.查看表空间大小: SELECT t.tablespace_name, round(SUM(bytes / (1024 * 1024*1024)), 0) ts_size_GB FROM dba_tablespaces t, dba_data_files d WHERE t.tablespace_name = d.tablespace_name GROUP BY t.tablespace_name;4.查看表空间的使用情况: SELECT tablespace_name ,SUM(bytes) / (1024 * 1024) AS free_space_MG 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$ts_free c WHERE a.tablespace_name = b.tablespace_name AND a.tablespace_name = c.tablespace_name;5.查看表空间物理文件的名称及大小:SELECT tablespace_name, file_id, file_name, round(bytes / (1024 * 1024*1024), 0) total_space FROM dba_data_files ORDER BY tablespace_name;6.查正在执行的sql和执行过的sql:a.查询正在执行的sqlselect a.username, a.sid,b.SQL_TEXT, b.SQL_FULLTEXT from v$session a, v$sqlarea b where a.sql_address = b.address;b.查询指定时间内执行过的sqlselect b.SQL_TEXT,b.FIRST_LOAD_TIME,b.SQL_FULLTEXT from v$sqlarea b where b.FIRST_LOAD_TIME between "2009-10-15/09:24:47" and "2009-10-15/09:24:47" order by b.FIRST_LOAD_TIME7.回收站:1 drop table t1 purge; 2 purge recyclebin;View Code 8.监控Oracle的等待事件:select event, sum(decode(wait_Time, 0, 0, 1)) "Prev", sum(decode(wait_Time, 0, 1, 0)) "Curr", count(*) "Tot" from v$session_Wait group by event order by 4;9.统计模式内的对象信息:a.查看当前schema的对象信息select object_type,count(*) from user_objects group by object_type;b.sys用户下查看指定schema的对象信息select SEGMENT_TYPE,COUNT(*) from dba_segments where tablespace_name="TSP_WEBAGENT" GROUP BY SEGMENT_TYPE;更多Oracle相关信息见Oracle 专题页面 http://www.linuxidc.com/topicnews.aspx?tid=12本文永久更新链接地址