Multidimensional DB
OO DBMS
DBMS
Data representation
Close mapping

Exploring language family "RDBMs"

MacAims    1968 RDBMs   United States   Set-based data retrieval language 
Query by Example    1969 RDBMs   United States   Database Query language  
SDDL    1969 RDBMs   United States   Stored-Data Definition Language 
SEQUEL    1973 RDBMs   United States   Limited expression language for data querying