Oracle supports numerous features that extend beyond standard SQL. In your Oracle applications, you can use these extensions just as you can use Core SQL:2003.
If you are concerned with the portability of your applications to other implementations of SQL, use Oracle's FIPS Flagger to help identify the use of Oracle extensions to Entry SQL92 in your embedded SQL programs. The FIPS Flagger is part of the Oracle precompilers and the SQL*Module compiler.
See Also:
Pro*COBOL Programmer's Guide and Pro*C/C++ Programmer's Guide for information on how to use the FIPS Flagger.