oracle表空間

1. 查看錶空間是否自增長

       SELECT FILE_NAME, TABLESPACE_NAME, AUTOEXTENSIBLE FROM DBA_DATA_FILES;

2. 查看錶空間大小

        select tablespace_name, sum(bytes) / 1024 / 1024 as MB from dba_data_files group by tablespace_name;

3. 查看錶空間使用情況

        select tablespace_name,count(*) as extends,round(sum(bytes) / 1024 / 1024, 2) as MB,sum(blocks) as blocks from dba_free_space group by tablespace_name;

4. 查看當前用戶默認表空間

        select username,default_tablespace from user_users;