There is a project that need collecting periodically (2 months) data into one table and then exporting it as excel file. The table is a temporary table, the app do that
delete from tb_name; insert into tb_name values..... ... insert into tb_name values.....
With that method, it would be causing more and more tablespace fragments, and make the performance decresing.
In other to avoid this disadvantage influences, I suggest programer modify the app as
truncate table tb_name drop storage; insert into tb_name select * from ...
The delete operation will be causing tablespace fragments.