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Oracle is an object-relational database management system. It supports a large number of languages and application development frameworks. Its primary languages are SQL, PL/SQL and Java, but it also includes support for C and C++. Oracle also has its own enterprise modules and application server software.
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http://www.dba-oracle.com/t_11g_new_complex_passwords.htm
http://docs.oracle.com/cd/B28359_01/network.111/b28531/authentication.htm