说明：  大家在应用ORACLE的时候可能会遇到很多看起来不难的问题, 特别对新手来说, 今天我简单把它总结一下, 发布给大家, 希望对大家有帮助! 和大家一起探讨, 共同进步!
(ORACLE in the application when you may encounter a lot of the problems seem difficult, especially for the novice, I simply put it today, to sum up, release to you, we want to help! And everyone of progress together!)