TY  - BOOK
AU  - Date,C.J.
TI  - SQL and relational theory: how to write accurate SQL code 
T2  - Theory in practice
SN  - 9780596523060
PY  - 2009///
CY  - [Sebastopol, CA] : 
PB  - O'Reilly, 
KW  - Relational databases
KW  - SQL (Computer program language)
N1  - Includes bibliographical references (p. 389-396) and index
ER  -