We built a summary table that aggregated the income and expense detail to show the end result for each transaction.
我们构建了一个汇总表，汇总收入和费用细节，显示每笔交易的最终结果。
The COUNT function is very useful to show at any level how many records make up each aggregated row in the summary table.
count函数非常有用，可以在任何级别显示汇总表中的每个汇总行由多少条记录组成。
A summary table stores data that has been aggregated in a way that answers a common (or resource-intensive) business query.
汇总表存储以回答常见(或资源密集型)业务查询的方式汇总的数据。
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