这说明您可以只提取感兴趣的三个列，还可以使用与数据库中的顺序不同的顺序从表中提取它们。
This demonstrates that you can pull out only those columns of interest, and you can also extract them from the table in a different order than they exist within the database.
通常，这可以通过使用简单的查找表或从数据库表读取值来实现。
Often, this can be implemented by using a simple lookup table or reading values from a database table.
简单的答案是从数据库中删除表。而且，如果必要，再创建一个替代表。
The simple answer is to delete the table from the database and, if necessary, create a replacement table.
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