I have created these two tables and launch every day a crontab to insert the number of rows from stats tables.

CREATE TABLE HIST_OWNER_TABLES_ROWS
( FECHA DATE NOT NULL,
OWNER VARCHAR2(30 CHAR) NOT NULL,
TABLE_NAME VARCHAR2(30 CHAR) NOT NULL,
NUM_ROWS NUMBER NOT NULL,
LAST_ANALYZED DATE,
CONSTRAINT HIST_OWNER_TABLES_ROWS_PK PRIMARY KEY (FECHA, OWNER, TABLE_NAME));

CREATE TABLE HIST_OWNER_SEGMENTS_BYTES
( FECHA DATE NOT NULL,
OWNER VARCHAR2(30 CHAR) NOT NULL,
TABLE_NAME VARCHAR2(30 CHAR) NOT NULL,
BYTES NUMBER NOT NULL ,
CONSTRAINT HIST_OWNER_SEGMENT_BYTES_PK PRIMARY KEY (FECHA, OWNER, TABLE_NAME));

---------------------------------------

insert into hist_owner_tables_rows
select sysdate,owner,table_name,decode(num_rows,null,0,num_rows),LAST_ANALYZED
from dba_tables
where last_analyzed is not null;


commit;

insert into hist_owner_segments_bytes
select sysdate,owner, segment_name,sum(bytes) from dba_segments
where segment_type='TABLE'
group by owner, segment_name;

commit;

Is following script is right or wrong?

SELECT ds.tablespace_name
,ds.segment_name
,dobj.object_type
,ROUND(SUM(dhss.space_used_delta) / 1024 / 1024 ,2) "Growth (MB)"
FROM dba_hist_snapshot snpshot
,dba_hist_seg_stat dhss
,dba_objects dobj
,dba_segments ds
WHERE begin_interval_time > TRUNC(SYSDATE)-360
AND snpshot.snap_id = dhss.snap_id
AND dobj.object_id = dhss.obj#
AND dobj.owner = ds.owner
AND dobj.object_name = ds.segment_name
AND ds.owner ='&owner' AND ds.SEGMENT_NAME IN ('&table_name') AND dobj.object_type='TABLE'
GROUP BY ds.tablespace_name,ds.segment_name,dobj.object_type
ORDER BY 3 ASC