From b37db3fd01a89bd4f296b07e1910209a5e3b305d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=96=AF=E7=8B=82=E7=9A=84=E7=8B=AE=E5=AD=90Li?=
 <15040126243@163.com>
Date: Mon, 24 Aug 2026 15:07:11 +0800
Subject: [PATCH] =?UTF-8?q?update=20=E4=BC=98=E5=8C=96=20=E5=A2=9E?=
 =?UTF-8?q?=E5=8A=A0=20groupby=20=E5=87=BD=E6=95=B0(=E6=84=9F=E8=B0=A2=20?=
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---
 .../core/query/LambdaJoinQueryBuilder.java    | 38 +++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/ruoyi-common/ruoyi-common-mybatis/src/main/java/org/dromara/common/mybatis/core/query/LambdaJoinQueryBuilder.java b/ruoyi-common/ruoyi-common-mybatis/src/main/java/org/dromara/common/mybatis/core/query/LambdaJoinQueryBuilder.java
index b97e558d4..2623f40d6 100644
--- a/ruoyi-common/ruoyi-common-mybatis/src/main/java/org/dromara/common/mybatis/core/query/LambdaJoinQueryBuilder.java
+++ b/ruoyi-common/ruoyi-common-mybatis/src/main/java/org/dromara/common/mybatis/core/query/LambdaJoinQueryBuilder.java
@@ -49,6 +49,44 @@ public final class LambdaJoinQueryBuilder<T> {
         return this;
     }
 
+    /**
+     * 添加分组字段。
+     *
+     * @param columns 分组字段
+     * @param <E>     字段所属实体类型
+     * @return 当前联表查询构造辅助对象
+     */
+    @SafeVarargs
+    public final <E> LambdaJoinQueryBuilder<T> groupBy(SFunction<E, ?>... columns) {
+        if (columns == null) {
+            return this;
+        }
+        for (SFunction<E, ?> column : columns) {
+            wrapper.groupBy(column);
+        }
+        return this;
+    }
+
+    /**
+     * 添加带表别名的分组字段。
+     *
+     * @param tableAlias 表别名
+     * @param columns    分组字段
+     * @param <E>        字段所属实体类型
+     * @return 当前联表查询构造辅助对象
+     */
+    @SafeVarargs
+    public final <E> LambdaJoinQueryBuilder<T> groupBy(String tableAlias, SFunction<E, ?>... columns) {
+        if (columns == null || columns.length == 0) {
+            return this;
+        }
+        String checkedAlias = AggregateSelectUtils.checkAlias(tableAlias);
+        for (SFunction<E, ?> column : columns) {
+            wrapper.groupBy(checkedAlias, column);
+        }
+        return this;
+    }
+
     /**
      * 指定主表查询字段。
      *