TY  - BOOK
AU  - Stephens,Ryan K,[...et al.]
TI  - Sams teach yourself SQL in 21 days
SN  - 0672311100
AV  - QA76.73.S67 1997 
PY  - 1997///
CY  - Indianapolis, Indiana
PB  - Sams publishing
KW  - SQL(computer program language)
ER  -