求ansi sql99文档!!!

There are three versions of the SQL standard: SQL-92, SQL:1999, and SQL:2003. They are endorsed by ANSI and ISO. Draft versions can be downloaded from:SQL-92 http://www.contrib.andrew.cmu.edu/~shadow/sql/sql1992.txt 
SQL:1999 http://www.cse.iitb.ac.in/dbms/Data/Papers-Other/SQL1999/ansi-iso-9075-2-1999.pdf 
SQL:2003 http://www.wiscorp.com/sql_2003_standard.zip 
Some SQL standards web pages are:http://troels.arvin.dk/db/rdbms/links/#standards 
http://www.wiscorp.com/SQLStandards.html 
http://www.contrib.andrew.cmu.edu/~shadow/sql.html#syntax (SQL-92) 
http://dbs.uni-leipzig.de/en/lokal/standards.pdf (paper)