links

   1 RA encoded in C++ templates
   2 http://aszt.inf.elte.hu/~gsd/s/cikkek/gener/submission_29.pdf
   3
   4 Book
   5 http://infolab.stanford.edu/~ullman/dscb.html
   6
   7 SQL-92 specification
   8 http://www.contrib.andrew.cmu.edu/~shadow/sql/sql1992.txt
   9
  10 SQL:2008 draft
  11 http://www.wiscorp.com/sql200n.zip
  12
  13 SQL-92 BNF
  14 http://savage.net.au/SQL/sql-92.bnf.html