Synchronization code

Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/DbMethods/DefaultDbMethod.cs

@@ -24,6 +24,10 @@ namespace SqlSugar
         {
             return "count(1) over()";
         }
+        public string RowSum(MethodCallExpressionModel model) 
+        {
+             return "SUM(" + model.Args[0].MemberName +") over()";
+        }
         public virtual string IIF(MethodCallExpressionModel model)
         {
             var parameter = model.Args[0];

Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/DbMethods/IDbMethods.cs

@@ -90,6 +90,7 @@ namespace SqlSugar
         string Stuff(MethodCallExpressionModel model);
         string RowNumber(MethodCallExpressionModel model);
         string RowCount(MethodCallExpressionModel model);
+        string RowSum(MethodCallExpressionModel model);
         string Exists(MethodCallExpressionModel model);
         string GetDateString(string dateValue,string format);
         string GetForXmlPath();

Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/DbMethods/SqlFunc.cs

@@ -33,6 +33,10 @@ namespace SqlSugar
         {
             throw new NotSupportedException("Can only be used in expressions");
         }
+        public static TRestult RowSum<TRestult>(TRestult filedName)
+        {
+            throw new NotSupportedException("Can only be used in expressions");
+        }
 
         public static string JsonField(object json,string fieldName)
         {

Src/Asp.NetCore2/SqlSugar/ExpressionsToSql/ResolveItems/MethodCallExpressionResolve_Helper.cs

@@ -790,6 +790,8 @@ namespace SqlSugar
                         return this.Context.DbMehtods.RowNumber(model);
                     case "RowCount":
                         return this.Context.DbMehtods.RowCount(model);
+                    case "RowSum":
+                        return this.Context.DbMehtods.RowSum(model);
                     case "Exists":
                         if (model.Args.Count > 1)
                         {