The example assumes that the table customer does not exists and the customer schema is already registered in the database.
以下的示例代码假设表的customer不存在，并且已经在数据库中注册了该customer模式。
Certainly a great art exists, and its existence reveals that ancient human beings were not without intelligence, skill, and sensitivity.
当然存在着一种伟大的艺术，而且它的存在揭示了古代人类并非没有智慧、技能和敏感性。
You cannot look up on Google something you do not know exists; and the ability to hold facts in your head is a prerequisite for many careers-the law, say, or engineering.
你不会去谷歌上查找你并不知其存在的东西；而脑袋里能记住一些事实的能力是从事许多职业的先决条件——比如说，法律或工程。
There also exists the misunderstanding volunteers should not ask for payment.
现在仍然存在一种误解，就是志愿者不应要求支付报酬。
What if Asia as an idea no longer exists not just for advertisers but for most of those who live within its supposed boundaries?
如果亚洲这个概念不但对那些广告商，而且也对绝大多数生活在其所谓边界内的人们都不再存在的话， 那会怎样呢？
With nihilism, no discussion is possible; for the nihilist logic doubts the existence of its interlocutor, and is not quite sure that it exists itself.
和虚无主义没有论争的可能。因为讲逻辑的虚无主义者怀疑和他进行争辩的对方是否存在，因而也就不能肯定他自己是否存在。
Matter exists, the minute exists, interest exists, the stomach exists; but the stomach must not be the sole wisdom.
物质是存在的，时间是存在的，利益是存在的，肚子是存在的；但肚子不应该是唯一的智慧。
Wealth property he tells us exists for the sake of virtue not virtue for the sake of wealth.
他告诉我们，财富，财产，是为了德行而存在，并非德行为了财富而存在。
He believes the argument implies nothing new, and he's content with the notion that free will exists only effectively (not theoretically).
他相信论证中没有什么新东西，并且满足于这样的观念：自由意志仅仅有效地存在，而非理论上存在。
You cannot prove whether God exists or not. But you can ask whether the existence or nonexistence of God is more consistent with your experience.
你无法证明神存在与否，但是你可以根据你的经验来判断神是否存在。
As it exists today, we're not interested in nor would it be something customers would be interested in the long term.
尽管现在它存在着，但是，我们对它毫无兴趣，也不觉得广大客户会长期地对它感兴趣。
That this silver lining exists should not obscure the cloud.
这存在的一丝希望不应反客为主。silver lining原意为“乌云的金边”，该句直译为：乌云的金边不应遮蔽了原有的云朵。
The first one asserts that the calculator instance object is not null, i.e. it exists.
第一个宣称这个计数器实例对象不是空，就像它实际存在一样。
But as the only life we know of exists here on Earth, it's not a bad assumption to make.
但是，作为我们已知的唯一一种存在在地球上的生命，这并不是个荒谬的假设。
It does not check that the comment exists already, so an incorrect ID here would create a new comment.
它不会检查评论是否已经存在，因此错误的ID会在此创建一个新评论。
The answers now pursued in the lab are not whether a genetic component for obesity exists, but which genes are responsible.
如今，实验室所追求的答案不是是否基因因素会导致肥胖，而是哪个基因导致了肥胖。
In addition, if the internal encoding exists and it is not a valid IBM encoding schema, the parser will issue a SQL16168N error message.
另外，如果内部编码虽然存在但却不是一个有效的IBM编码模式，解析器将会发出SQL 16168n错误消息。
This is something that cannot be feigned, learned, or coerced-it either exists or it does not.
这是不能假装、学习、或被迫的，它或者存在，或者不存在。
This means that the deployment environment exists, but the actual resources have not been generated yet.
这表示部署环境已经存在，但还没有生成实际资源。
This will allow for a consistent API across all JVM languages for access to both public and enterprise services, which is not something that currently exists on the JVM.
这样，最终我们就可以得到一个跨所有JVM语言访问公共和企业服务的一致的API，当前JVM上并不存在这种东西。
Garnett: That depends on significant interest from consumers in their carbon emissions, which I'm not sure exists.
加内特：这取决于消费者重大利益的碳排放量，这我不知道存在。
Often times in a rush to get the product out the door, developers might put in code not realizing functionality that already exists elsewhere.
大多数时候，为了赶紧发布产品，开发人员提交代码时并不了解其它地方已经实现了的功能。
What we've just done, after all, is imagine that my mind exists but my body does not.
我们刚才所作的，就是想象我的心灵存在，而身体不存在。
There exists a very respectable liberal school which does not hate Waterloo.
有个很可敬的自由派丝毫不恨滑铁卢。
A system of devolution exists but has not been implemented.
这是一项转换体系，但至今还未实施。
But try to imagine a world in which the Evening Star exists, but the Morning Star does not.
但是尝试想象在一个世界里昏星存在，而晨星不存在。
But try to imagine a world in which the Evening Star exists, but the Morning Star does not.
但是尝试想象在一个世界里昏星存在，而晨星不存在。
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