"Flink CDC sql中：select from where 和 from where select 的区别在哪里？就比如查看表a，字段b等于1的数据，一种写法是：select from a where b=1 另一种写法是：from a where b=1 select ，这两种写法都能正确查出数据，但是我不太理解两种写法在本质逻辑上的区别？"

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更新时间 2024-08-01 13:22:17

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实时计算Flink版

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