<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Sql on</title><link>https://h30306.github.io/blog/zh-tw/tags/sql/</link><description>Recent content in Sql on</description><generator>Hugo -- gohugo.io</generator><language>zh-tw</language><managingEditor>hwork0511@gmail.com (Wei Yi Chung)</managingEditor><webMaster>hwork0511@gmail.com (Wei Yi Chung)</webMaster><copyright>© 2026 Wei Yi Chung</copyright><lastBuildDate>Wed, 21 Oct 2026 00:00:00 +0000</lastBuildDate><atom:link href="https://h30306.github.io/blog/zh-tw/tags/sql/index.xml" rel="self" type="application/rss+xml"/><item><title>SQL 基本查詢</title><link>https://h30306.github.io/blog/zh-tw/algorithm/sql/</link><pubDate>Wed, 21 Oct 2026 00:00:00 +0000</pubDate><author>hwork0511@gmail.com (Wei Yi Chung)</author><guid>https://h30306.github.io/blog/zh-tw/algorithm/sql/</guid><description>SELECT &amp;hellip; WHERE 的條件組合，以及 NULL 的三值邏輯：任何跟 NULL 的比較都不是 true，要用 IS NULL</description><media:content xmlns:media="http://search.yahoo.com/mrss/" url="https://h30306.github.io/blog/algorithm/sql/featured.png"/></item><item><title>LeetCode 1757: Recyclable and Low Fat Products</title><link>https://h30306.github.io/blog/zh-tw/leetcode/leetcode-1757/</link><pubDate>Tue, 23 Dec 2025 00:00:00 +0000</pubDate><author>hwork0511@gmail.com (Wei Yi Chung)</author><guid>https://h30306.github.io/blog/zh-tw/leetcode/leetcode-1757/</guid><description>LeetCode 1757 解題筆記：兩個條件都要成立，用 WHERE &amp;hellip; AND &amp;hellip; 過濾</description><media:content xmlns:media="http://search.yahoo.com/mrss/" url="https://h30306.github.io/blog/leetcode/leetcode-1757/featured.png"/></item><item><title>LeetCode 584: Find Customer Referee</title><link>https://h30306.github.io/blog/zh-tw/leetcode/leetcode-584/</link><pubDate>Tue, 23 Dec 2025 00:00:00 +0000</pubDate><author>hwork0511@gmail.com (Wei Yi Chung)</author><guid>https://h30306.github.io/blog/zh-tw/leetcode/leetcode-584/</guid><description>LeetCode 584 解題筆記：referee_id != 2 會漏掉 NULL，因為跟 NULL 比較的結果是 unknown；要另外加上 IS NULL</description><media:content xmlns:media="http://search.yahoo.com/mrss/" url="https://h30306.github.io/blog/leetcode/leetcode-584/featured.png"/></item></channel></rss>