[Oracle database experience | This blog is to share Oracle database administration experience about building complex systems, solving problems, and reviewing some technical methods that may be not so popular. This blog describes my thoughts about Oracle that can be not the same as the official Oracle inc. opinion. This blog is to share Oracle database administration experience about building complex systems, solving problems, and reviewing some technical methods that may be not so popular. This blog describes my thoughts about Oracle that can be not the same as the official Oracle inc. opinion.]