For your reference, here is a list of publicly available SQL standard documents. Some are very late draft versions, where the final version is closed source and has to be purchased from ISO or ANSI directly:
- SQL-92 http://www.contrib.andrew.cmu.edu/~shadow/sql/sql1992.txt
- SQL:1999 http://web.cs.ualberta.ca/~yuan/courses/db_readings/ansi-iso-9075-2-1999.pdf
- SQL:2003 http://www.wiscorp.com/sql_2003_standard.zip
- SQL:2008 (preliminary) http://www.wiscorp.com/sql200n.zip
The links were taken from here: