diff --git a/FreeSql/Interface/Curd/ISelect/ISelect0.cs b/FreeSql/Interface/Curd/ISelect/ISelect0.cs
index 8e1567b3..09350041 100644
--- a/FreeSql/Interface/Curd/ISelect/ISelect0.cs
+++ b/FreeSql/Interface/Curd/ISelect/ISelect0.cs
@@ -255,6 +255,12 @@ namespace FreeSql
 
         /// <summary>
         /// 查询数据前，去重
+        /// <para>
+        /// .Distinct().ToList(x => x.GroupName) 对指定字段去重
+        /// </para>
+        /// <para>
+        /// .Distinct().ToList() 对整个查询去重
+        /// </para>
         /// </summary>
         /// <returns></returns>
         TSelect Distinct();