11g database more and bigger "app" folder size...

Hi Experts,

my 11g R1 database "app" folder size is 13.1 GB. I run a pl/sql code today which took place for 5 hours and it has increased the size of the database... the plsql code add about 800 million lines in a table... I soften this table and there is no change in the size of the "app" folder... and I see that C:\app\Administrator\oradata\orcl is 9.2 GB and a C:\app\Administrator\oradata\orcl\UNDOTBS01 file. DBF is 6.4 GB...

1. What is this oradata folder?
2. What is the use of UNDOTBS01. DBF file? Can I delete it?
3. how to reduce the size of my "app" folder with on deleting data useful (i.e. something like "Disk Cleanup" in windows)?

Thanks in advance,

DK

There is no record of the table, but in any case, you mentioned that you are not a db guy is not serious. If you add the data file would increase. If you remove it, it will not be back and he called fragmentation (think of Gruyère, the holes in it is the fragmentation). You need to fragment the tablespace/datafile to get rid of this lost space.

Aman...

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