Is there any sample database available containing comprehensive demo data across all modules?

I often have dificulties due to interpreting terms and fields etc. The Demo Data is often lacking or absent in the module that I am trying to configure, for example 'Accounting-Bank Accounts' contains no demo data to assist with understanding csv bank statement imports. A sample database containing comprehensive demo data across all modules would be very useful (file format as a .dump file would be most useful). Is this available anywhere?