SQL业务场景的相关内容

文章 2024-03-14 来自：开发者社区

日活3kw下，如何应对实际业务场景中SQL过慢的优化挑战？

在面试中，SQL调优是一个常见的问题，通过这个问题可以考察应聘者对于提升SQL性能的理解和掌握程度。通常来说，SQL调优需要按照以下步骤展开。首先，需要发现问题。最好结合具体业务情况，比如某次线下报警显示出现了慢SQL，或者接口响应时间较长，经过性能分析发现问题出现在SQL查询上。无论何种情况&#...

阿里云文档 2023-11-08

SQL分析预置的函数类型及其使用相关说明,包括日期与时间函数、数学函数、窗口函数、聚合函数和字符串函数,以及除上述函数之外的支持其他业务场景的函数_物联网平台(IoT)

SQL分析自身预置了诸多函数，可以满足大部分业务场景的数据处理需求。本文为您介绍SQL分析提供的函数类型及函数使用相关说明。

问答 2022-12-19 来自：开发者社区

请问数仓开发里面的“单实例SQL”可以跨数据库查询么？我有一天个业务场景，从一个数据库每日同步一张

请问数仓开发里面的“单实例SQL”可以跨数据库查询么？我有一天个业务场景，从一个数据库每日同步一张表的到另一个数据库，要怎么实现比较合适呢？

文章 2022-02-16 来自：开发者社区

PostgreSQL 11 preview - SQL:2011 window frame clause全面支持及窗口、帧用法和业务场景介绍

标签 PostgreSQL , window , frame , 窗口 , 帧 , 窗口函数 , 聚合函数 , range , rows , groups 背景 PostgreSQL 在2009年发布的8.4版本中，就已经支持了window语法，frame clause有部分未支持。 PostgreSQL 11将全面覆盖SQL:2011的窗口语法。提交的PATCH介绍如下： https:/...

问答 2021-12-06 来自：开发者社区

Flink SQL GROUP BY后写入postgresql数据库主键如何实现业务场景需求呢？

SQL中对时间窗口和PRODUCT_ID进行了Group By聚合操作，PG数据表中的主键须设置为WINDOW_START /WINDOW_END和PRODUCT_ID，否则无法以upinsert方式写出数据，但是这样却无法满足业务场景的需求，业务上应以RANK_ID +WINDOW_START /WINDOW_END为主键标识，请问Flink 中该如何实现这个需求？*来自志愿...

问答 2021-10-14 来自：开发者社区

高并发业务场景下，哪些SQL操作可能会导致数据库连接数暴增，连接释放不及时？

问答 2021-10-14 来自：开发者社区

怎么解决数据库SQL高并发业务场景下缓存和数据库一致性问题？比如：数据重复插入问题

问答 2021-10-13 来自：开发者社区

有没有在SQL中使用within GROUP将多行合并成一行的，适用于哪些的业务场景？

问答 2021-10-13 来自：开发者社区

有没有使用SQL中触发器的业务场景？

有没有使用SQL中触发器的业务场景？如果想要监听表的数据是否发生变化，是否适合使用触发器？

问答 2018-10-18 来自：开发者社区

大家一般都什么业务场景下用sql啊？

转自钉钉群21789141：大家一般都什么业务场景下用sql啊？

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更新时间 2024-08-29 17:32:23

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