在数据库管理中，SQL查询优化是提升数据库性能的关键环节。PolarDB作为一个高性能的云原生数据库，提供了多种工具和策略来帮助用户优化SQL查询，提高查询效率和资源利用率。本文将分享PolarDB SQL优化的实践经验，探讨如何通过一系列措施来提升查询性能。一、SQL优化的重要性 SQL优化对于数据库性能至关重要，它可以&...

问答 2024-05-23 来自：开发者社区

PolarDB从5.6升级到5.7后相同的统计sql，查询出来的结果差别差很多，为什么？

问答 2024-04-25 来自：开发者社区

PolarDB这个条 SQL，强行列存的效果还没有行存查询高，怎么回事？

PolarDB这个条 SQL，强行列存的效果还没有行存查询高，怎么回事？SELECT/+ SET_VAR(cost_threshold_for_imci=0) / roi.merchant_id, roi.sku_id, roi.machine_code, roi.door_num, roi.sku_name, SUM( CASE roi.create_type WHEN 1 THEN ...

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云数据库SQL Server，具有企业许可授权，权限更为开放，引擎功能更为强大。能完美支持Windows平台的.NET架构，支持复杂SQL查询，性能优秀，并有强大的可视化管理工具，帮助您轻松管理数据。

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PolarDB这个条 SQL，强行列存的效果还没有行存查询高，怎么回事？

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