diff --git a/Src/Asp.NetCore2/SqlSugar/Abstract/QueryableProvider/QueryableProvider.cs b/Src/Asp.NetCore2/SqlSugar/Abstract/QueryableProvider/QueryableProvider.cs
index f304f19a8..85dc8d5e4 100644
--- a/Src/Asp.NetCore2/SqlSugar/Abstract/QueryableProvider/QueryableProvider.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Abstract/QueryableProvider/QueryableProvider.cs
@@ -1078,6 +1078,18 @@ namespace SqlSugar
             }
             return this;
         }
+
+        public ISugarQueryable<T> GroupByIF(bool isGroupBy, string groupFields)
+        {
+            if (isGroupBy)
+            {
+                GroupBy(groupFields);
+            }
+
+            return this;
+        }
+
+
         public virtual ISugarQueryable<T> OrderByIF(bool isOrderBy, string orderFileds)
         {
             if (isOrderBy)
diff --git a/Src/Asp.NetCore2/SqlSugar/Interface/IQueryable.cs b/Src/Asp.NetCore2/SqlSugar/Interface/IQueryable.cs
index 9d20283d2..2b458a181 100644
--- a/Src/Asp.NetCore2/SqlSugar/Interface/IQueryable.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Interface/IQueryable.cs
@@ -117,6 +117,8 @@ namespace SqlSugar
         ISugarQueryable<T> GroupBy(string groupFileds);
         ISugarQueryable<T> GroupByIF(bool isGroupBy, Expression<Func<T, object>> expression);
 
+        ISugarQueryable<T> GroupByIF(bool isGroupBy, string groupFields);
+
         ISugarQueryable<T> PartitionBy(Expression<Func<T, object>> expression);
         ISugarQueryable<T> PartitionBy(string groupFileds);
 
diff --git a/Src/OracleUS7ASCII/US7ASCII乱码.txt b/Src/OracleUS7ASCII/US7ASCII乱码.txt
index 3c6e15dbb..f9019daeb 100644
--- a/Src/OracleUS7ASCII/US7ASCII乱码.txt
+++ b/Src/OracleUS7ASCII/US7ASCII乱码.txt
@@ -1 +1 @@
-US7ASCII ���봫�ð汾
\ No newline at end of file
+US7ASCII 乱码专用版本