Script for adding datafile to tablespace

Question

Hi
Does anyone have a template alter tablespace add datafile script handy?
Basically, we need to, in the event of a tablespace alert, do two things:
query that tablespace to see how much space is remaining.
ascertain the size of the datafiles added to that tablespace already (to clarify what size we should make the additional datafile)
finally, the command itself for adding the extra datafile.
Thanks.
10.0.2.0

Answer 1

SELECT Total.tablespace_name "TSPACE_NAME",
round(nvl(TOTAL_SPACE,0),2) Tot_space,
round(nvl(USED_Space,0),2) Used_space,
round(nvl(TOTAL_SPACE - USED_Space,0),2) Free_space,
round(nvl(round(nvl((TOTAL_SPACE - USED_Space)*100,0),2)/(Total_space),0),2) "USED%"
FROM
(select tablespace_name, sum(bytes/1024/1024) TOTAL_SPACE
from sys.dba_data_files
group by tablespace_name
) Total,
(select tablespace_name, sum(bytes/1024/1024) USED_Space
from sys.dba_segments
group by tablespace_name
) USED
WHERE Total.Tablespace_name(+) = USED.tablespace_name and
round(nvl(round(nvl((TOTAL_SPACE - USED_Space)*100,0),2)/(Total_space),0),2)< 20;
the above query will display tablespaces which are having freespace below 20%
select file_name,autoextensible,sum(bytes)/1024/1024,sum(maxbytes)/1024/1024
from dba_data_files
where tablespace_name='TBS_NAME'
group by file_name,autoextensible;
the above query will give details of datafiles like autoextensible or not etc.
SELECT SUBSTR (df.NAME, 1, 40) file_name,dfs.tablespace_name, df.bytes / 1024 / 1024 allocated_mb,
((df.bytes / 1024 / 1024) - NVL (SUM (dfs.bytes) / 1024 / 1024, 0))
used_mb,
NVL (SUM (dfs.bytes) / 1024 / 1024, 0) free_space_mb
FROM v$datafile df, dba_free_space dfs
WHERE df.file# = dfs.file_id(+)
GROUP BY dfs.file_id, df.NAME, df.file#, df.bytes,dfs.tablespace_name
ORDER BY file_name;
the above query will show how much freespace is left in each datafile.