TY  - BOOK
AU  - Leon, Alexis Leon, Mathews 
TI  - SQL : a complete reference 
SN  - 0-07-463-708-8 
U1  - 005. 133 LEO  
PY  - 1999///
CY  - Tata mcgraw hill 
PB  - New Delhi 
KW  - PROGRAMMING LANGUAGE
ER  -