Also known as analytic function, PARTITION BY, OVER
kind of function in SQL; calculations across a set of table rows that are somehow related to the current row
在SQL中，窗函数(window function)或分析函数(analytic function)是一个函数，它使用来自一行或多行的值来为每一行返回一个值。 与之形成对比，为多行返回单个值。窗口函数有一个OVER子句；任何没有OVER子句的函数都不是窗口函数，而是聚合函数或单行（标量）函数。
Abstract from DBpedia / Wikipedia · CC BY-SA
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).