这看起来是一个非常简单的问题，但很多人并不喜欢它，特别是在西方。
It seems like a simple enough question, but it does bother some people, especially in the West.
这个问题看起来简单，但是你要“解开”它时你就会发现它还真是一道难题。
The problem looks simple, but when you try to unlash it you'll find it's a real teaser.
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！
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!
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