incoming call wire grouping key 呼入集线键 ; 入局呼叫线分组键
position grouping key 交换台并席键
grouping double-key cryptogram 分组双密密钥密码
When a grouping key is specified, the data must be grouped by this key before the aggregation can be computed, as illustrated in figure 13.
指定了分组关键词后，必须在完成聚合计算之前，依据这一关键词对数据进行分组，如图 13 所示。
Attempting to accomplish grouping of elements by detecting first occurrence of a grouping key and using that as a trigger to form a group. Symptoms are use of.
查找第一个分组键并作为组成分组的触发器来对元素分组。
If more than one column is aggregated using the same grouping key or without a grouping key, then all the aggregations are computed within the same operation with a single pass over the data.
如果利用相同的分组关键字或者没有分组关键字，来聚合多个列，那么，所有的聚合都在单个数据传递中的相同操作中进行。
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