问题一：CUMULATE窗口函数相比传统方案有哪些优点？ CUMULATE窗口函数相比传统方案有哪些优点？参考回答： CUMULATE窗口函数的优点包括使用窗口结束时间作为横坐标，确保每个点的纵坐标是对应时间点的累计值，使曲线在回溯历史或作业failover时都能完全还原，且分维度值相加等于总维度值；同时，使用两阶段聚合防止distinct key倾...

问答 2024-08-19 来自：开发者社区

如何在Flink SQL中使用Dynamic Cumulate Window绘制直播间累计UV曲线？

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更新时间 2024-08-23 12:59:20

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阿里云实时计算Flink版(Alibaba Cloud Realtime Compute)，完全兼容开源的Apache Flink，比开源性能提升2～3倍，提供了完整的告警、监控、日志的解决方案、提升开发效率且无运维成本，并有社区专家提供技术支持。

立即开通

产品控制台

产品文档

实时同步

MySQL 到 Hologres

Kafka 到 Hologres

功能对比

开源Flink对比

成本优化

作业自动调优