Philip and Alex's Guide to Web Publishing (core textbook; available online and also as a hardcopy)
SQL for Web Nerds (tutorial for the SQL language; links into online Oracle docs for completeness)
All the Oracle database server tools can be downloaded; these are available at no charge to developers worldwide; the versions that you download do not expire and are not crippled in any way .
The AOLserver website contains complete online docs for the AOLserver Tcl API; if you need help plugging it together with Oracle or Postgres, look at these forums.