oracle的入门心得.oracle的体系太庞大了，对于初学者来说，难免会有些无从下手的感觉，什么都想学，结果什么都学不好，所以把学习经验共享一下，希望让刚刚入门的人对oracle有一个总体的认识，少走一些弯路。 -oracle portal experience. oracle of the system is too large, and for beginners, not to gain the upper hand will inevitably be some sense of what want to learn what the results are bad places, so the learning experience to share about, want to just entry oracle of the people have a general understanding and less take some detours.