How to find remaining free space in your schema

Question

Hi
I am new to Oracle hence this question..
What is the command that would help me know how much percent of space allocated to my schema has been used and also how to find remaining amount of space in bits or bytes or whatever from SQL or any where... I am not a database admin (fyi)
Appreciate ur help in this reg
Thanx
Kris

Answer 1

Kris, free space is not assigned to a schema in Oracle per say, but it you mean "how can I see how much of their quota a user has used?" then the following should help.
You can find quotas in dba_ts_quotas (also user version)
You can find how much space has been used in dba_extents (also user_extents)
You should be able to write a query that compared the sum of the used space for a tablespace to the quota for the tablespace. Try the following query (notice how DBA's are treated)
select q.username, q.tablespace_name,
q.bytes as Quota, e.spcused as Used,
round(q.bytes/e.spcused * 100,2) as Percentage
from dba_ts_quotas q,
(select tablespace_name, owner, sum(bytes) as spcused
from dba_extents
group by tablespace_name, owner
) e
where q.tablespace_name = e.tablespace_name
and q.username = e.owner
If you are actually interested in how much free space is left in a tablespace you can look at dba_free_space (user_free_space), but the value returned is not adjusted for the quota limitation. You need the query above for that.
HTH -- Mark D Powell --