5.2. Non-SQL Databases
- File-system based.
- Either binary key - binary value associative array (like Berkeley DB, GDBM, etc.).
- Or relational-database based (XDBM and friends) - multiple fields in a table, indexes, etc.
- Freshmeat Article about Non-SQL Databases
- Working with such databases is more tedious than working with SQL databases. But they offer somewhat greater control.