gist.github

Reproducing the hudi-rs upsert benchmark against delta-rs and PyIceberg

Clone this repository at <script src="https://gist.github.com/yihua/66ad80224f8e50020025dc76d138dd0a.js"></script> Save yihua ...
GitHub

README.md

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blog.csdn

MySQL 8.0 加了联合索引查询反而更慢：3 种失效与回表实测

本内容遵循CC 4.0 BY-SA版权协议 本文深入分析MySQL 8.0中联合索引查询反而变慢的三大核心原因：最左前缀断裂、隐式类型转换、非覆盖索引导致的回表开销。结合EXPLAIN与性能计数器，量化扫描行 ...

WordPress "Another update is currently in progress" error: How to fix when deleting the lock doesn't work

One of the sites I manage was unable to update WordPress from 7.1.3 to 7.1.4-ja.Even after deleting the lock and stopping the cache, it wouldn't fix, and the cause I eventually arrived at was ...

Streamlining Oracle SQL Design Reviews with Claude Fable

Introduction"Could you take a look at this SQL?""Could you please review this table design?"Do you find yourself flooded with ...
blog.csdn

SQL Server教室管理系统课设项目：含数据库建模与WinForms实战

本博客介绍了一个基于SQL Server与WinForms实现的教室信息管理系统课程设计项目，涵盖数据库建模（5张表）、三层架构（ADO.NET手写SQL、业务逻辑层7个事务方法、WinForms表示层数据绑定）、环境快速部署（建库建表脚本、连接字符串配置、F5运行）及高频问题排查。重点解析了课表冲突检测的时间重叠 ...
GitHub

createTable_v1_4.sql

INSERT INTO feedback (orders_no, fee_customer, fee_customer_tel, fee_customer_time, fee_time, fee_content, fee_rating) VALUES (1, '顧客A', '0985510798', '2026-08-24 ...