Update exp to sql

Src/Asp.Net/SqlServerTest/UnitTest/UQueryable2.cs

@@ -87,6 +87,9 @@ namespace OrmTest
             .Where(it=>2>it.id).Select(it=> new Order() {
                  Id=SqlFunc.IIF(2>it.id,1,2)
             }).ToList();
+
+
+            var qu4 = Db.Queryable<Order>().OrderBy(it=>it.Id+it.Id).ToList();
         }
     }
 }

Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/BinaryExpressionResolve.cs

@@ -8,6 +8,21 @@ namespace SqlSugar
     public class BinaryExpressionResolve : BaseResolve
     {
         public BinaryExpressionResolve(ExpressionParameter parameter) : base(parameter)
+        {
+            switch (parameter.Context.ResolveType)
+            {
+                case ResolveExpressType.FieldSingle:
+                case ResolveExpressType.FieldMultiple:
+                    var sql = base.GetNewExpressionValue(this.Expression);
+                    this.Context.Result.Append(sql);
+                    break;
+                default:
+                    Other(parameter);
+                    break;
+            }
+        }
+
+        private void Other(ExpressionParameter parameter)
         {
             var expression = this.Expression as BinaryExpression;
             var operatorValue = parameter.OperatorValue = ExpressionTool.GetOperator(expression.NodeType);