udf user defined function meaning in English
用户定义的功能
Examples
- The solution for aggregation of timestamp durations is to use timestampdiff , a built - in udf user defined function that is included with db2 udb , as shown in the following example
解决持续时间的聚合问题可以使用timestampdiff ，如下面的样本实例中所显示，它是使用db2 udb实现的嵌入式udf （用户定义的功能） 。
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