To calculate the Datafile Growth on a yearly basis:
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select to_char(CREATION_TIME,'RRRR') year,to_char(CREATION_TIME,'MM') month,round(sum(bytes)/1024/1024/1024) gb
from v$datafile group by to_char(CREATION_TIME,'RRRR'),to_char(CREATION_TIME,'MM') order by 1,2;
YEAR MO GB
---- -- ----------
2000 04 9
2004 06 5
2004 11 5
2005 01 2
2005 02 4
2005 06 4
2005 09 20
2005 10 2
2005 11 12
2006 01 8
2007 01 1
2007 06 8
2007 08 1490
2008 01 8
2008 02 9
2008 03 44
2008 04 22
2008 07 16
2008 09 10
2008 10 57
2009 01 14
2009 02 36
2009 04 37
2009 05 26
2009 06 23
2009 07 82
2009 08 0
2009 09 18
2009 11 36
2009 12 16
2010 01 39
2010 02 80
2010 03 6
2010 04 56
2010 05 80
2010 06 471
2010 07 36
2010 08 75
2010 09 160
2010 10 4
2010 12 38
2011 02 59
2011 04 52
2011 05 16
2011 07 78
2011 08 40
2011 09 9
2011 10 78
2011 11 57
2011 12 8
2012 01 110
2012 02 134
2012 06 6
2012 08 14
Through OEM :
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Here are the steps to know Database growth pattern for last one month/year using OEM
1) Login to OEM and Click on the Reports Tab
2) Navigate to Reports–>Storage–>Oracle Database Space Usage path and Click on Oracle Database Space Usage link.
3) Select the Target database and here we are getting Oracle Database space usage for last one Month.
4) Also we can get one year Database growth by setting Set Time Period Button.
5) Also we can find Oracle Database Tablespace Monthly Space Usage by Navigating Reports–>Storage–>Oracle Database Space Usage path and click on Oracle Database Tablespace Monthly Space Usage link.
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