Oracle Window Functions Execution Process

The general flow of execution for Oracle window functions is as follows:

1. First, identify the dataset to which the window function is applied, including determining the sorting order and partitioning of the dataset.
2. Next, the data set is grouped according to the partition method of the window function.
3. Sort the data within each group according to the ordering rules of the window function.
4. Apply window functions to the data within each group to calculate the result of the window function.
5. Finally, return the results of the window function within each group to the user.

Generally speaking, the execution process of window functions can be summarized simply as: grouping, sorting, applying window functions, and returning results.