Oracle表空间管理

1，Oracle表空间物理存放文件位置

       用SYS登陆SQLPLUS，select t1.name,t2.name from v$tablespace t1,v$datafile t2  where t1.ts# = t2.ts#;

1、查看表空间的名称及大小   

SQl > 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、查看表空间物理文件的名称及大小   

SQl > SELECT tablespace_name, file_id, file_name, round(bytes / (1024 * 1024), 0) total_space FROM dba_data_files ORDER BY tablespace_name;   

 

3、查看回滚段名称及大小   

SQl > 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   

SQl > SELECT NAME FROM v$controlfile;   

 

5、查看日志文件   

SELECT MEMBER FROM v$logfile;   

 

6、查看表空间的使用情况   

SQl > SELECT SUM(bytes) / (1024 * 1024) AS free_space, tablespace_name  FROM dba_free_space GROUP BY tablespace_name;   

 

SQl > 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、查看数据库库对象   

SQl > SELECT owner, object_type, status, COUNT(*) count# FROM all_objects GROUP BY owner, object_type, status;   

 

8、查看数据库的版本　   

SQl > SELECT version FROM product_component_version WHERE substr(product, 1, 6) = 'Oracle';   

 

9、查看数据库的创建日期和归档方式   

SQl > SELECT created, log_mode, log_mode FROM v$database;