From bad7025b007406400fa0ab2572880be0d452d98c Mon Sep 17 00:00:00 2001
From: oyo <oyo@byteawake.com>
Date: Wed, 22 Oct 2025 19:27:53 +0800
Subject: [PATCH] =?UTF-8?q?=E6=9B=B4=E6=96=B0=20knowledge.md?=
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---
 knowledge.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/knowledge.md b/knowledge.md
index be240f4..b23cfe5 100644
--- a/knowledge.md
+++ b/knowledge.md
@@ -1493,6 +1493,7 @@ class CreateUserBto {    //对应实体user
   - exists子查询：`EXISTS(SELECT 1 FROM other_table WHERE ...)`
   - 简单计数：`SELECT COUNT(*) WHERE ...`或`SELECT COUNT(*) > 0 WHERE ...`
   - 一层或多层inner join和left join
+  - DISTINCT：`SELECT DISTINCT xxx`，虽然读方案语法本身不支持，但是可以使用读方案查出一个对象列表，然后在内存中进行去重即可，无需使用自定义查询
 - ❌ 必须自定义查询：
   - GROUP BY聚合
   - 数据库内置函数：`SELECT DATE_FORMAT(start_time, '%Y-%m') FROM meeting`