<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom" xmlns:content="http://purl.org/rss/1.0/modules/content/"><channel><title>SQL on Blog</title><link>https://icelemon.top/tags/sql/</link><description>Recent content in SQL on Blog</description><generator>Hugo</generator><language>zh-CN</language><lastBuildDate>Sat, 24 Oct 2026 00:00:00 +0800</lastBuildDate><atom:link href="https://icelemon.top/tags/sql/index.xml" rel="self" type="application/rss+xml"/><item><title>关系模型、约束与事务边界</title><link>https://icelemon.top/tech/foundations/relational-data/</link><pubDate>Sat, 24 Oct 2026 00:00:00 +0800</pubDate><guid>https://icelemon.top/tech/foundations/relational-data/</guid><description>用数据库约束和事务表达数据规则，理解隔离与并发更新。</description></item></channel></rss>