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Just a simple question (I guess). Oracle released a new JDBC driver for Oracle Database 12c including a Java 7 JDBC driver (ojdbc7 - 12.1.0.1). Here, we've been using Oracle 10g database with ojdbc6 for Oracle 11g (11.2.0.4) without any problem. Now, my questions.
If I upgrade my application server to use ojdbc7 for Oracle 12c, is it too risk? Does the Oracle maintains compatibility of their drivers with previous versions?
Yes. This is officially supported per Oracle. http://www.oracle.com/technetwork/database/enterprise-edition/jdbc-faq-090281.html#01_02