<?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>拼接字段 on liyue.name</title><link>https://liyue.name/tags/%E6%8B%BC%E6%8E%A5%E5%AD%97%E6%AE%B5/</link><description>Recent content in 拼接字段 on liyue.name</description><generator>Hugo</generator><language>zh-cn</language><lastBuildDate>Tue, 10 Feb 2026 21:58:01 +0000</lastBuildDate><atom:link href="https://liyue.name/tags/%E6%8B%BC%E6%8E%A5%E5%AD%97%E6%AE%B5/index.xml" rel="self" type="application/rss+xml"/><item><title>PostgreSQL拼接字段要用两个竖杠||</title><link>https://liyue.name/posts/postgresql%E6%8B%BC%E6%8E%A5%E5%AD%97%E6%AE%B5%E8%A6%81%E7%94%A8%E4%B8%A4%E4%B8%AA%E7%AB%96%E6%9D%A0/</link><pubDate>Wed, 15 Aug 2018 11:22:35 +0000</pubDate><guid>https://liyue.name/posts/postgresql%E6%8B%BC%E6%8E%A5%E5%AD%97%E6%AE%B5%E8%A6%81%E7%94%A8%E4%B8%A4%E4%B8%AA%E7%AB%96%E6%9D%A0/</guid><description>将两个列拼接起来 用两个竖杠 || 不能用加号 +</description></item></channel></rss>