A brief discussion on merged grouping and core architecture design

Recently, when doing statistical functions, we often need to use the merged grouping content. If we only use the aggregation function based on the grouped statistical values, if we process the grouped string columns, we must write our own function to process it. For example, there is such a data information: now we need to group the data above to obtain statistical results: Implementation method 1: & n

## 1. Example code with XML for Path merged packet information (Figure Figure Figure Text)

##Introduction: Recently, when doing statistical functions, it is often necessary to use merged grouping content. If only Just use the aggregate function based on the grouped statistical values. If we process the grouped string columns, we have to write our own function to process it. For example, if there is such data information:

2.

Oracle peer merge groupingIntroduction: Oracle peer merge grouping, use the function sys_connect_by_path(column,

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