Oracle Tablespace Utilization Script

Tablespace Utilization Script for Tablespace Space Used % more than 85 %
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Check the tablespace Utilization.
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set pages 500 lines 250
col tablespace_name format a30
col TABLESPACE_NAME heading "Tablespace|Name"
col Allocated_size heading "Allocated|Size(GB)" form 99999999.99
col Current_size heading "Current|Size(GB)" form 99999999.99
col Used_size heading "Used|Size(GB)" form 99999999.99
col Available_size heading "Available|Size(GB)" form 99999999.99
col Pct_used heading "%Used (vs)|(Allocated)" form 99999999.99

select a.tablespace_name
        ,a.alloc_size/1024/1024/1024 Allocated_size
        ,a.cur_size/1024/1024/1024 Current_Size
        ,(u.used+a.file_count*65536)/1024/1024/1024 Used_size
        ,(a.alloc_size-(u.used+a.file_count*65536))/1024/1024/1024 Available_size
        ,((u.used+a.file_count*65536)*100)/a.alloc_size Pct_used
from     dba_tablespaces t
        ,(select t1.tablespace_name
        ,nvl(sum(s.bytes),0) used
        from  dba_segments s
        ,dba_tablespaces t1
         where t1.tablespace_name=s.tablespace_name(+)
         group by t1.tablespace_name) u
        ,(select d.tablespace_name
        ,sum(greatest(d.bytes,nvl(d.maxbytes,0))) alloc_size
        ,sum(d.bytes) cur_size
        ,count(*) file_count
        from dba_data_files d
        group by d.tablespace_name) a
where t.tablespace_name=u.tablespace_name
and ((u.used+a.file_count*65536)*100)/a.alloc_size>85
and t.tablespace_name=a.tablespace_name
order by t.tablespace_name;


Check the details of the datafiles for a particular TableSpace 
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set pages 500 lines 250
col tablespace_name for a30
col CREATION_TIME for a15
col file_name for a70
select dd.tablespace_name TABLESPACE_NAME,dd.file_name,dd.bytes/1024/1024 Size_MB,dd.autoextensible,dd.maxbytes/1024/1024 MAXSIZE_MB,df.CREATION_TIME
from dba_data_files dd, v$datafile df where df.name=dd.file_name and tablespace_name=UPPER('&TABLESPACENAME') order by 1,2,6;



Get DDL for tablespace 
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set pagesize 0
SET LONG 9999999
select dbms_metadata.get_ddl('TABLESPACE',upper('&TABLESPACE_NAME')) FROM DUAL;