Update .net core project

Src/Asp.NetCore2/SqlSugar/Realization/Dm/DmProvider.cs

@@ -41,6 +41,13 @@ namespace SqlSugar
                 return sql;
             };
         }
+        public override string SqlParameterKeyWord
+        {
+            get
+            {
+                return ":";
+            }
+        }
         public override IDbConnection Connection
         {
             get

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

@@ -49,9 +49,9 @@ namespace SqlSugar
             }
             this.OrderByValue = oldOrderBy;
             result = GetSqlQuerySql(result);
-            if (result.IndexOf("-- No table") > 0)
+            if (result.Contains("-- No table") )
             {
-                return "-- No table";
+                return "select * from (select 1 as id) where id=0 -- No table";
             }
             return result;
         }