diff --git a/Src/Asp.NetCore2/SqlSeverTest/OscarTest/Demo/Demo0_SqlSugarClient.cs b/Src/Asp.NetCore2/SqlSeverTest/OscarTest/Demo/Demo0_SqlSugarClient.cs
index b94d38b81..c2ab83de3 100644
--- a/Src/Asp.NetCore2/SqlSeverTest/OscarTest/Demo/Demo0_SqlSugarClient.cs
+++ b/Src/Asp.NetCore2/SqlSeverTest/OscarTest/Demo/Demo0_SqlSugarClient.cs
@@ -16,7 +16,7 @@ namespace OrmTest
             SqlSugarClient();//Create db
             DbContext();//Optimizing SqlSugarClient usage
             SingletonPattern();//Singleten Pattern
-            DistributedTransactionExample();
+            //DistributedTransactionExample();
             MasterSlave();//Read-write separation 
             CustomAttribute(); 
         }
@@ -237,7 +237,7 @@ namespace OrmTest
 
             //use db2
             db.ChangeDatabase("2");
-            db.DbMaintenance.CreateDatabase();//Create Database2
+            //db.DbMaintenance.CreateDatabase();//Create Database2
             db.CodeFirst.SetStringDefaultLength(200).InitTables(typeof(Order), typeof(OrderItem));
             db.Insertable(new Order() { Name = "order1", CreateTime = DateTime.Now }).ExecuteCommand();
             Console.WriteLine(db.CurrentConnectionConfig.DbType + ":" + db.Queryable<Order>().Count());
diff --git a/Src/Asp.NetCore2/SqlSeverTest/OscarTest/Demo/Demo5_SqlQueryable.cs b/Src/Asp.NetCore2/SqlSeverTest/OscarTest/Demo/Demo5_SqlQueryable.cs
index aa235aed8..a840ca869 100644
--- a/Src/Asp.NetCore2/SqlSeverTest/OscarTest/Demo/Demo5_SqlQueryable.cs
+++ b/Src/Asp.NetCore2/SqlSeverTest/OscarTest/Demo/Demo5_SqlQueryable.cs
@@ -23,13 +23,13 @@ namespace OrmTest
             });
 
             int total = 0;
-            var list = db.SqlQueryable<Order>("select * from \"order\"").ToPageList(1, 2, ref total);
+            var list = db.SqlQueryable<Order>("select * from  order  ").ToPageList(1, 2, ref total);
 
 
             //by expression
-            var list2 = db.SqlQueryable<Order>("select * from \"order\"").Where(it => it.Id == 1).ToPageList(1, 2);
+            var list2 = db.SqlQueryable<Order>("select * from  order ").Where(it => it.Id == 1).ToPageList(1, 2);
             //by sql
-            var list3 = db.SqlQueryable<Order>("select * from \"order\"").Where("id=@id", new { id = 1 }).ToPageList(1, 2);
+            var list3 = db.SqlQueryable<Order>("select * from order ").Where("id=@id", new { id = 1 }).ToPageList(1, 2);
 
             Console.WriteLine("#### SqlQueryable End ####");
         }
diff --git a/Src/Asp.NetCore2/SqlSeverTest/OscarTest/Demo/Demo6_Queue.cs b/Src/Asp.NetCore2/SqlSeverTest/OscarTest/Demo/Demo6_Queue.cs
index 53e641491..ea8f524ef 100644
--- a/Src/Asp.NetCore2/SqlSeverTest/OscarTest/Demo/Demo6_Queue.cs
+++ b/Src/Asp.NetCore2/SqlSeverTest/OscarTest/Demo/Demo6_Queue.cs
@@ -29,22 +29,22 @@ namespace OrmTest
                     }
                 }
             });
-            db.Insertable<Order>(new Order() { Name = "a" }).AddQueue();
-            db.Insertable<Order>(new Order() { Name = "b" }).AddQueue();
-            db.SaveQueues();
+    //        db.Insertable<Order>(new Order() { Name = "a" }).AddQueue();
+    //        db.Insertable<Order>(new Order() { Name = "b" }).AddQueue();
+    //        db.SaveQueues();
 
 
-            db.Insertable<Order>(new Order() { Name = "a" }).AddQueue();
-            db.Insertable<Order>(new Order() { Name = "b" }).AddQueue();
-            db.Insertable<Order>(new Order() { Name = "c" }).AddQueue();
-            db.Insertable<Order>(new Order() { Name = "d" }).AddQueue();
-            var ar = db.SaveQueuesAsync();
-            ar.Wait();
+    //        db.Insertable<Order>(new Order() { Name = "a" }).AddQueue();
+    //        db.Insertable<Order>(new Order() { Name = "b" }).AddQueue();
+    //        db.Insertable<Order>(new Order() { Name = "c" }).AddQueue();
+    //        db.Insertable<Order>(new Order() { Name = "d" }).AddQueue();
+    //        var ar = db.SaveQueuesAsync();
+    //        ar.Wait();
 
-            db.Queryable<Order>().AddQueue();
-            db.Queryable<Order>().AddQueue();
-            db.AddQueue("select * from `order` where id=@id", new { id = 10000 });
-    /*        var result2 = db.SaveQueues<Order, Order, Order>()*/;
+    //        db.Queryable<Order>().AddQueue();
+    //        db.Queryable<Order>().AddQueue();
+    //        db.AddQueue("select * from  order  where id=@id", new { id = 10000 });
+    ///*        var result2 = db.SaveQueues<Order, Order, Order>()*/;
 
             Console.WriteLine("#### Queue End ####");
         }
diff --git a/Src/Asp.NetCore2/SqlSeverTest/OscarTest/Demo/Demo7_Ado.cs b/Src/Asp.NetCore2/SqlSeverTest/OscarTest/Demo/Demo7_Ado.cs
index b561decdf..1c181ddd9 100644
--- a/Src/Asp.NetCore2/SqlSeverTest/OscarTest/Demo/Demo7_Ado.cs
+++ b/Src/Asp.NetCore2/SqlSeverTest/OscarTest/Demo/Demo7_Ado.cs
@@ -30,13 +30,13 @@ namespace OrmTest
                 }
             });
             //sql
-            var dt = db.Ado.GetDataTable("select * from \"order\" where  @id>0 or name=@name", new List<SugarParameter>(){
+            var dt = db.Ado.GetDataTable("select * from   order  where  @id>0 or name=@name", new List<SugarParameter>(){
               new SugarParameter("@id",1),
               new SugarParameter("@name","2")
             });
 
             //sql  
-            var dt2 = db.Ado.GetDataTable("select * from \"order\" where @id>0  or name=@name", new { id = 1, name = "2" });
+            var dt2 = db.Ado.GetDataTable("select * from  order  where @id>0  or name=@name", new { id = 1, name = "2" });
 
             //Stored Procedure
             //var dt3 = db.Ado.UseStoredProcedure().GetDataTable("sp_school", new { name = "张三", age = 0 }); 
@@ -47,9 +47,9 @@ namespace OrmTest
 
 
             //There are many methods to under db.ado
-            var list= db.Ado.SqlQuery<Order>("select * from \"order\" ");
+            var list= db.Ado.SqlQuery<Order>("select * from  order  ");
             var intValue=db.Ado.SqlQuerySingle<int>("select 1");
-            db.Ado.ExecuteCommand("delete  from \"order\" where id>1000");
+            db.Ado.ExecuteCommand("delete  from  order  where id>1000");
             //db.Ado.xxx
             Console.WriteLine("#### Ado End ####");
         }
diff --git a/Src/Asp.NetCore2/SqlSeverTest/OscarTest/Demo/DemoE_CodeFirst.cs b/Src/Asp.NetCore2/SqlSeverTest/OscarTest/Demo/DemoE_CodeFirst.cs
index b9f83e034..db7b1412d 100644
--- a/Src/Asp.NetCore2/SqlSeverTest/OscarTest/Demo/DemoE_CodeFirst.cs
+++ b/Src/Asp.NetCore2/SqlSeverTest/OscarTest/Demo/DemoE_CodeFirst.cs
@@ -19,7 +19,7 @@ namespace OrmTest
                 InitKeyType = InitKeyType.Attribute,
                 IsAutoCloseConnection = true
             });
-            db.DbMaintenance.CreateDatabase(); 
+            //db.DbMaintenance.CreateDatabase(); 
             db.CodeFirst.InitTables(typeof(CodeFirstTable1));//Create CodeFirstTable1 
             db.Insertable(new CodeFirstTable1() { Name = "a", Text="a" }).ExecuteCommand();
             var list = db.Queryable<CodeFirstTable1>().ToList();
diff --git a/Src/Asp.NetCore2/SqlSeverTest/OscarTest/Demo/DemoF_Utilities.cs b/Src/Asp.NetCore2/SqlSeverTest/OscarTest/Demo/DemoF_Utilities.cs
index ef949850c..12413547c 100644
--- a/Src/Asp.NetCore2/SqlSeverTest/OscarTest/Demo/DemoF_Utilities.cs
+++ b/Src/Asp.NetCore2/SqlSeverTest/OscarTest/Demo/DemoF_Utilities.cs
@@ -37,7 +37,7 @@ namespace OrmTest
                 Console.WriteLine(string.Join("," ,list));   
             });
 
-            var list2= db.Utilities.DataTableToList<Order>(db.Ado.GetDataTable("select * from \"order\""));
+            var list2= db.Utilities.DataTableToList<Order>(db.Ado.GetDataTable("select * from  order "));
 
             //more https://github.com/sunkaixuan/SqlSugar/wiki/f.Utilities
             Console.WriteLine("#### Utilities End ####");