Synchronization code

Src/Asp.NetCore2/SqlSugar/Abstract/QueryableProvider/QueryableHelper.cs

@@ -1196,6 +1196,11 @@ namespace SqlSugar
                         result +=
                           QueryBuilder.GetExpressionValue(item, isSingle ? ResolveExpressType.FieldSingle : ResolveExpressType.FieldMultiple).GetResultString() + ",";
                     }
+                    else if (item is MemberExpression && type == OrderByType.Desc)
+                    {
+                        result +=
+                          QueryBuilder.GetExpressionValue(item, isSingle ? ResolveExpressType.FieldSingle : ResolveExpressType.FieldMultiple).GetResultString() + " Desc,";
+                    }
                     else if (type == OrderByType.Desc) 
                     {
                         result +=

Src/Asp.NetCore2/SqlSugar/Realization/Dm/SqlBuilder/DmExpressionContext.cs

@@ -54,6 +54,10 @@ namespace SqlSugar
     }
     public partial class DmMethod : DefaultDbMethod, IDbMethods
     {
+        public override string GetStringJoinSelector(string result, string separator)
+        {
+            return $"listagg(to_char({result}),'{separator}') within group(order by {result}) ";
+        }
         public override string ToInt64(MethodCallExpressionModel model)
         {
             var parameter = model.Args[0];