C64 Basic    My Evolution    xBase
    ↓                           ↓
  Pascal                    SQL Server
    ↓                           ↓
    C                          DB2
    ↓                           ↓
   C++                        Oracle
    ↓                           ↓
PowerBuilder                  MySQL
    ↓                           ↓
   Java                     PostgreSQL
    ↓  
   Ruby