这些功能包括排序、分组、聚集以及一个操作不同数据类型的大型函数集。
These capabilities include sorting, grouping, aggregating, and a large set of functions to manipulate the different data types.
然而，对每条记录都包含不同数据类型的记录存储进行排序要复杂一些。
Working with a record store that contains multiple data types in each record presents a little more of a challenge, however.
在这种方法中，为查询中的每个数据类型创建两个列：一个用于升序排序，另一个用于降序排序。
In this method, we will create two columns per data type in the query: one for ascending ordering, the other for descending ordering.
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