[racket] A language mode for SQL

There have been several SQL-in-sexp libraries over the years.  When done 
as Racket syntax extension, they can do some compile-type syntax 
checking.  They also can automatically do escaping of values to avoid 
SQL injection attacks.   The library I've used most recently is 
unfortunately closed source, but there were others for PLT Scheme in the 
past; try Googling.

Neil V.