前言本篇文章讲解的主要内容是：如何使用lag函数让结果集重复数据只显示一次、用行转列pivot写法优化部门之间计算工资差异类似需求、如何通过ceil函数对已有数据进行分组打印、放假安排团队分组值班，如何通过ntile()over(order by )快速进行人员分组【SQL开发实战技巧】这一系列博主当作复习旧知识来进行写作，毕竟SQL开发在数据分析场景非常重要且基础，面试也会经常问SQL开发和调....

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云原生数据仓库AnalyticDB MySQL版

基于湖仓一体架构打造的实时湖仓，高度兼容MySQL，毫秒级更新，亚秒级查询。不论在数据湖中的非/半结构化数据，还是在数据库中的结构化数据，都能同时完成高吞吐离线处理和高性能在线分析，做到数据湖的规模，数据库的体验。

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实现 MySQL 到 ADB 秒级分析性能

在数据驱动决策的时代，一款性能卓越的数据分析引擎不仅能为企业提供高效的数据支撑，同时也解决了传统 OLTP 在数据分析时面临的查询性能瓶颈、数据不一致等挑战。本方案推荐通过 AnalyticDB MySQL + DTS 来解决 MySQL 的数据分析性能问题。

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