ORACLE数据库存储空间使用情况查询

使用系统sys或者dba权限的账户创建视图如下:

1. 主要从数据库的表dba_data_files,dba_segments两张表中获取。
2. 默认数据库保存的是byte单位，转换关系如下:
   1024bytes = 1kb
   1024KB = 1M
   1024M = 1G

CREATE OR REPLACE VIEW V_GET_DISKSPACE AS
 SELECT A.TABLESPACE_NAME,
 A.USE "USED (MB)",
 (B.TOTAL-A.USE) "FREE (MB)",
 B.TOTAL "TOTAL (MB)",
 round((B.TOTAL-A.USE)/B.TOTAL,5)*100||"%" "PER_FREE"
 FROM
 (
 select TABLESPACE_NAME,sum(bytes)/(1024*1024) as USE from dba_segments
 /*where tablespace_name NOT IN ("USERS","SYSAUX","UNDOTBS1","SYSTEM","UNDOTBS2")*/
 GROUP BY TABLESPACE_NAME
 ) A ,
 (
 WITH TABLESPACE_TOTAL AS
 (
 SELECT tablespace_name,sum(MAXBYTES)/(1024*1024) TOTAL FROM DBA_DATA_FILES T
 WHERE /*T.TABLESPACE_NAME NOT IN ("USERS","SYSAUX","UNDOTBS1","SYSTEM","UNDOTBS2")
 AND*/ T.AUTOEXTENSIBLE="YES" group by tablespace_name
 UNION ALL
 SELECT tablespace_name,sum(bytes) TOTAL FROM DBA_DATA_FILES T
 WHERE /*T.TABLESPACE_NAME NOT IN ("USERS","SYSAUX","UNDOTBS1","SYSTEM","UNDOTBS2")
 AND*/ T.AUTOEXTENSIBLE="NO" group by tablespace_name
 )
 SELECT TABLESPACE_NAME,SUM(TOTAL) TOTAL FROM TABLESPACE_TOTAL GROUP BY TABLESPACE_NAME
 ) B
 WHERE A.TABLESPACE_NAME=B.TABLESPACE_NAME;

LINUX服务器查询

1. du -sch * 使用该命令查询当前目录下文件夹占用的空间的情况

2. df -hl 查询磁盘剩余空间