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窗口函数

窗口函数对与当前行有某种关系的一组表行执行计算，比如移动平均值，累积聚合，运行总计或每组结果的前N个结果。

type=info

提示


使用窗口函数引用本表时，第一个参数必须填写Null。

如果计算列中的第一个参数不是空/空字符串，则不支持任何窗口函数。

注意


使用MySQL数据库时，须8.0及以上版本才支持窗口函数。