Oracle查询表空间大小及每个表所占空间的大小语句示例

SELECT
	tablespace_name,
	sum( bytes ) / 1024 / 1024 
FROM
	dba_data_files 
GROUP BY
	tablespace_name;

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

SELECT
	a.tablespace_name,
	total,
	free,
	total - free AS used,
	substr( free / total * 100, 1, 5 ) AS "FREE%",
	substr( ( total - free ) / total * 100, 1, 5 ) AS "USED%" 
FROM
	(SELECT tablespace_name, sum( bytes ) / 1024 / 1024 AS total FROM dba_data_files GROUP BY tablespace_name) a,
	(SELECT tablespace_name, sum( bytes ) / 1024 / 1024 AS free FROM dba_free_space GROUP BY tablespace_name) b 
WHERE
	a.tablespace_name = b.tablespace_name 
ORDER BY
	a.tablespace_name;

SELECT
	t.segment_name,
	t.segment_type,
	sum( t.bytes / 1024 / 1024 ) "占用空间(M)" 
FROM
	dba_segments t 
WHERE
	t.segment_type = 'TABLE' 
	AND t.segment_name = 'TABLE_NAME' 
GROUP BY
	OWNER,
	t.segment_name,
	t.segment_type;

create user csy identified by csy default tablespace ANIMAL;

select tablespace_name from user_tablespaces;

create user csy identified by csy default tablespace ANIMAL;

grant connect, resource, dba to csy;

create table dog
(
    name varchar(12),
    age varchar(12)
)
tablespace animal;

SELECT
	tablespace_name, table_name 
FROM
	user_tables 
WHERE
	tablespace_name = 'ANIMAL';

drop tablespace ANIMAL including contents and datafiles;

drop user user_name cascade;