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文章 2025-01-03 来自：开发者社区

深入解析 Hologres Table Group 与 Shard Count

Hologres 作为一款强大的实时数仓，为海量数据的高效存储与快速查询提供了有力支持。其中，Table Group 与 Shard Count 是两个至关重要的概念，深刻理解它们对于优化 Hologres 的使用性能起着关键作用。最近跟同事一起聊起这个概念，跟大家一起聊聊聊。一、分片概念在Hologres中数据存储在Pangu系统上，Shard表示数据分片，Table Gr...

文章 2023-08-19 来自：开发者社区

数据统计与计数：解析MySQL中的COUNT()函数

在数据库管理中，统计某一列数据的行数是常见的数据分析任务，COUNT()函数正是用于帮助我们实现这一目标的工具。 COUNT()函数的基本用法 MySQL中的COUNT()函数用于统计某一列数据的行数，其基本用法如下： SELECT COUNT(column_name) FROM table_name; 其中，column_...

文章 2022-02-16 来自：开发者社区

Script:诊断解析等待和高version count

Script:诊断解析等待和高version count select * from 本文转自maclean_007 51CTO博客，原文链接:http://blog.51cto.com/maclean/1278585

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更新时间 2025-01-04 12:12:42

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