根据以上所述，如果找不到DB 2中具有相同功能的函数，那么可以重写SQL，以不同的方式访问数据。

As just described, if you can't find a DB2 equivalent function, you can rewrite your SQL to access data a different way.

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如果找不到位置将调用第二个函数。

The second is called if a location cannot be found.

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如果在检查了所有实参后，仍找不到唯一最佳匹配函数，则该调用错误。编译器将提示该调用具有二义性。

If after looking at each argument there is no single function that is preferable, then the call is in error. The compiler will complain that the call is ambiguous.

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