TY  - BOOK
AU  - Date,C.J.
TI  - An introduction to database systems 
T2  - Addison-Wesley systems programming series
SN  - 0201144719
PY  - 1982///-1983
CY  - Reading, Massachusetts
PB  - Addison-Wesley
KW  - SISTEMAS DE GESTION DE BASES DE DATOS
N1  - Incluye referencias bibliográficas e índice; v.1; (Basic concepts ; Storage structures ; Data structures and corresponding operators ; Relational data structure ; The architecture of System R ; System R data structure ; System R data manipulation ; Embedded SQL ; The external level of System R ; The internal level of System R ; Query by example ; Relational algebra ; Relational calculus ; Further normalization ; The architecture of an IMS systems ; IMS data structure ; The external level of IMS ; IMS data manipulation ; The internal level of IMS ; IMS logical databases ; 
IMS secondary indexing ; IMS Fast Path databases ; The architecture of a DBTG Systems ; DBTG data structure ; The external level DBTG ; DBTG data manipulation ; The unified database language ; A comparison of the relational and network approaches).; v.2; (Recovery ; Integrity ; Concurrency ; Security ; Data models ; The extended relational model RM/T ; Distributed databases ; Databases machines)

ER  -