Is there a good tool for ensuring that an SQL query is valid ANSI SQL, and optionally what DBMSs will fail to interpret it? I\'ve found http://developer.mimer.com/validator
Maybe a parser/generator like ANTLR or JavaCC has an ANSI SQL 92 grammar already built. If so, you can run the parser/generator, build the classes that come out, and Bob's your uncle.
I see that ANTLR has one that's based on Oracle PL/SQL. Maybe that can help you. ANTLR is a terrific tool, well worth knowing.