Subject Doubts regarding statistics of indexes and tables...
Author Javier Cintron
Firebird ver 64 bits
Windows Server 2012R2

In firebird, how do you calculate statistics to feed the query optimizer? 

Note: I know that the command: 'set statistics index <index_name>;' calculate statistics for indexes, but what about tables for example?

And my second question:

is there any way to backup the statistics before recalculate them?

Note: This backup can be very useful if the new statistics create a performance problem

Thanks in advance for your help