Introduction Koherent::DB is a Pure-Perl RDBMS, which is operated without SQL. Koherent::DB works like O/R mappers and you can write everithing you want to do with it in Perl. You can also use Perl functions and operators to caluculate and search through Koherent::DB. Even database servers are not necessary and you can open and close databases like files using Standalone mode of Koherent::DB. Samp