Problems with Oracle SQL
It seems to be the general rule of thumb that, when you want to  google for an oracle error message, then exclusion of both oracle documentation site, and developer forums is your first criteria on the search bar.  Same applies to Microsoft (large parts of MSDN), and now Amazon Web Services documentation (at least some parts of it).That's the reason StackOverflow works - it really solves programmer's problems, instead of the strange dialects of English and style that flourish on MS and Oracle and Java docs.