diff --git a/Src/Asp.Net/OracleTest/Demo/Demo0_SqlSugarClient.cs b/Src/Asp.Net/OracleTest/Demo/Demo0_SqlSugarClient.cs
index 3b66869af..c8ff54bc5 100644
--- a/Src/Asp.Net/OracleTest/Demo/Demo0_SqlSugarClient.cs
+++ b/Src/Asp.Net/OracleTest/Demo/Demo0_SqlSugarClient.cs
@@ -17,7 +17,6 @@ namespace OrmTest
             SqlSugarClient();//Create db
             DbContext();//Optimizing SqlSugarClient usage
             SingletonPattern();//Singleten Pattern
-            DistributedTransactionExample();
             MasterSlave();//Read-write separation 
             CustomAttribute(); 
         }
@@ -29,7 +28,7 @@ namespace OrmTest
             SqlSugarClient db = new SqlSugarClient(new ConnectionConfig()
             {
                 ConnectionString = Config.ConnectionString,//Master Connection
-                DbType = DbType.SqlServer,
+                DbType = DbType.Oracle,
                 InitKeyType = InitKeyType.Attribute,
                 IsAutoCloseConnection = true,
                 SlaveConnectionConfigs = new List<SlaveConnectionConfig>() {
@@ -37,6 +36,7 @@ namespace OrmTest
                        new SlaveConnectionConfig() { HitRate=10, ConnectionString=Config.ConnectionString2 }
                 } 
             });
+
             db.Aop.OnLogExecuted = (s, p) =>
             {
                 Console.WriteLine(db.Ado.Connection.ConnectionString);
@@ -54,7 +54,7 @@ namespace OrmTest
             Console.WriteLine("#### SqlSugarClient Start ####");
             SqlSugarClient db = new SqlSugarClient(new ConnectionConfig()
             {
-                DbType = DbType.SqlServer,
+                DbType = DbType.Oracle,
                 ConnectionString = Config.ConnectionString,
                 InitKeyType = InitKeyType.Attribute,
                 IsAutoCloseConnection = true,
@@ -68,11 +68,17 @@ namespace OrmTest
                 }
             });
 
-            //If no exist create datebase 
-            db.DbMaintenance.CreateDatabase();
+
+            var isAnySeq = db.Ado.GetInt("SELECT COUNT(*)  FROM USER_SEQUENCES WHERE SEQUENCE_NAME = 'SEQ_ID'") >0;
+            //Create seq  相当于创建一个自增标识
+            if (!isAnySeq)
+            {
+                db.Ado.ExecuteCommand("CREATE SEQUENCE Seq_Id");
+            }
+ 
 
             //Use db query
-            var dt = db.Ado.GetDataTable("select 1");
+            var dt = db.Ado.GetDataTable("select 1 from dual");
 
             //Create tables
             db.CodeFirst.InitTables(typeof(OrderItem),typeof(Order));
@@ -147,7 +153,7 @@ namespace OrmTest
             SqlSugarClient db = new SqlSugarClient(new ConnectionConfig()
             {
                 ConnectionString = Config.ConnectionString,
-                DbType = DbType.SqlServer,
+                DbType = DbType.Oracle,
                 IsAutoCloseConnection = true,
                 InitKeyType = InitKeyType.Attribute,
                 ConfigureExternalServices = new ConfigureExternalServices()
@@ -210,7 +216,7 @@ namespace OrmTest
             new ConnectionConfig()
             {
                 ConfigId = 1,
-                DbType = DbType.SqlServer,
+                DbType = DbType.Oracle,
                 ConnectionString = Config.ConnectionString,
                 InitKeyType = InitKeyType.Attribute,
                 IsAutoCloseConnection = true,
@@ -219,126 +225,6 @@ namespace OrmTest
                     OnLogExecuting = (sql, p) => { Console.WriteLine(sql); }
                 }
             });
-
-
-        private static void DistributedTransactionExample()
-        {
-            Console.WriteLine("");
-            Console.WriteLine("#### Distributed TransactionExample Start ####");
-            SqlSugarClient db = new SqlSugarClient(new List<ConnectionConfig>()
-            {
-                new ConnectionConfig(){ ConfigId="1", DbType=DbType.SqlServer, ConnectionString=Config.ConnectionString,InitKeyType=InitKeyType.Attribute,IsAutoCloseConnection=true },
-                new ConnectionConfig(){ ConfigId="2", DbType=DbType.SqlServer, ConnectionString=Config.ConnectionString2 ,InitKeyType=InitKeyType.Attribute ,IsAutoCloseConnection=true}
-            });
-
-            //use db1
-            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());
-
-            //use db2
-            db.ChangeDatabase("2");
-            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());
-
-            // Example 1
-            Console.WriteLine("Example 1");
-            try
-            {
-                db.BeginTran();
-
-                db.ChangeDatabase("1");//use db1
-                db.Deleteable<Order>().ExecuteCommand();
-                Console.WriteLine("---Delete all " + db.CurrentConnectionConfig.DbType);
-                Console.WriteLine(db.Queryable<Order>().Count());
-
-                db.ChangeDatabase("2");//use db2
-                db.Deleteable<Order>().ExecuteCommand();
-                Console.WriteLine("---Delete all " + db.CurrentConnectionConfig.DbType);
-                Console.WriteLine(db.Queryable<Order>().Count());
-
-                throw new Exception();
-                db.CommitTran();
-            }
-            catch
-            {
-                db.RollbackTran();
-                Console.WriteLine("---Roll back");
-                db.ChangeDatabase("1");//use db1
-                Console.WriteLine(db.CurrentConnectionConfig.DbType);
-                Console.WriteLine(db.Queryable<Order>().Count());
-
-                db.ChangeDatabase("2");//use db2
-                Console.WriteLine(db.CurrentConnectionConfig.DbType);
-                Console.WriteLine(db.Queryable<Order>().Count());
-            }
-
-
-
-            // Example 2
-            Console.WriteLine("Example 2");
-
-            var result=db.UseTran(() =>
-            {
-
-                db.ChangeDatabase("1");//use db1
-                db.Deleteable<Order>().ExecuteCommand();
-                Console.WriteLine("---Delete all " + db.CurrentConnectionConfig.DbType);
-                Console.WriteLine(db.Queryable<Order>().Count());
-
-                db.ChangeDatabase("2");//use db2
-                db.Deleteable<Order>().ExecuteCommand();
-                Console.WriteLine("---Delete all " + db.CurrentConnectionConfig.DbType);
-                Console.WriteLine(db.Queryable<Order>().Count());
-                throw new Exception("");
-
-            });
-            if (result.IsSuccess == false) {
-                Console.WriteLine("---Roll back");
-                db.ChangeDatabase("1");//use db1
-                Console.WriteLine(db.CurrentConnectionConfig.DbType);
-                Console.WriteLine(db.Queryable<Order>().Count());
-
-                db.ChangeDatabase("2");//use db2
-                Console.WriteLine(db.CurrentConnectionConfig.DbType);
-                Console.WriteLine(db.Queryable<Order>().Count());
-            }
-
-            // Example 3
-            Console.WriteLine("Example 3");
-
-            var result2 = db.UseTranAsync(() =>
-            {
-
-                db.ChangeDatabase("1");//use db1
-                db.Deleteable<Order>().ExecuteCommand();
-                Console.WriteLine("---Delete all " + db.CurrentConnectionConfig.DbType);
-                Console.WriteLine(db.Queryable<Order>().Count());
-
-                db.ChangeDatabase("2");//use db2
-                db.Deleteable<Order>().ExecuteCommand();
-                Console.WriteLine("---Delete all " + db.CurrentConnectionConfig.DbType);
-                Console.WriteLine(db.Queryable<Order>().Count());
-                throw new Exception("");
-
-            });
-            result2.Wait();
-            if (result.IsSuccess == false)
-            {
-                Console.WriteLine("---Roll back");
-                db.ChangeDatabase("1");//use sqlserver
-                Console.WriteLine(db.CurrentConnectionConfig.DbType);
-                Console.WriteLine(db.Queryable<Order>().Count());
-
-                db.ChangeDatabase("2");//use mysql
-                Console.WriteLine(db.CurrentConnectionConfig.DbType);
-                Console.WriteLine(db.Queryable<Order>().Count());
-            }
-
-            Console.WriteLine("#### Distributed TransactionExample End ####");
-        }
     }
 
     /// <summary>
@@ -353,7 +239,7 @@ namespace OrmTest
             Db = new SqlSugarClient(new ConnectionConfig()
             {
                 ConnectionString = Config.ConnectionString,
-                DbType = DbType.SqlServer,
+                DbType = DbType.Oracle,
                 IsAutoCloseConnection = true,
                 InitKeyType = InitKeyType.Attribute,
                 AopEvents = new AopEvents()
@@ -387,7 +273,7 @@ namespace OrmTest
             Db = new SqlSugarClient(new ConnectionConfig()
             {
                 ConnectionString = Config.ConnectionString,
-                DbType = DbType.SqlServer,
+                DbType = DbType.Oracle,
                 IsAutoCloseConnection = true,
                 InitKeyType = InitKeyType.Attribute,
                 AopEvents = new AopEvents()
diff --git a/Src/Asp.Net/OracleTest/Demo/Demo1_Queryable.cs b/Src/Asp.Net/OracleTest/Demo/Demo1_Queryable.cs
index fa82db4e7..6a02e2550 100644
--- a/Src/Asp.Net/OracleTest/Demo/Demo1_Queryable.cs
+++ b/Src/Asp.Net/OracleTest/Demo/Demo1_Queryable.cs
@@ -171,7 +171,7 @@ namespace OrmTest
               .Mapper(it => it.B, it => it.BId).ToList();
 
             //Manual mode
-            var result = db.Queryable<OrderInfo>().Take(10).Select<ViewOrder>().Mapper((itemModel, cache) =>
+            var result = db.Queryable<OrderInfo>().Select<ViewOrder>().Mapper((itemModel, cache) =>
             {
                 var allItems = cache.Get(orderList => {
                     var allIds = orderList.Select(it => it.Id).ToList();
@@ -189,7 +189,7 @@ namespace OrmTest
             Console.WriteLine("#### No Entity Start ####");
             var db = GetInstance();
 
-            var list = db.Queryable<dynamic>().AS("order ").Where("id=id", new { id = 1 }).ToList();
+            var list = db.Queryable<dynamic>().AS("order").Where("id=id", new { id = 1 }).ToList();
 
             var list2 = db.Queryable<dynamic>("o").AS("order").AddJoinInfo("OrderDetail", "i", "o.id=i.OrderId").Where("id=id", new { id = 1 }).Select("o.*").ToList();
             Console.WriteLine("#### No Entity End ####");
@@ -252,7 +252,7 @@ namespace OrmTest
             //id=@id
             var list4 = db.Queryable<Order>().Where("id=@id", new { id = 1 }).ToList();
             //id=@id or name like '%'+@name+'%'
-            var list5 = db.Queryable<Order>().Where("id=@id or name like '%'+@name+'%' ", new { id = 1, name = "jack" }).ToList();
+            var list5 = db.Queryable<Order>().Where("id=@id or name like  @name", new { id = 1, name = "%jack%" }).ToList();
 
 
 
@@ -323,7 +323,7 @@ namespace OrmTest
         {
             return new SqlSugarClient(new ConnectionConfig()
             {
-                DbType = SqlSugar.DbType.SqlServer,
+                DbType = SqlSugar.DbType.Oracle,
                 ConnectionString = Config.ConnectionString,
                 InitKeyType = InitKeyType.Attribute,
                 IsAutoCloseConnection = true,
diff --git a/Src/Asp.Net/OracleTest/Demo/Demo2_Updateable.cs b/Src/Asp.Net/OracleTest/Demo/Demo2_Updateable.cs
index a4caa3045..3938edd31 100644
--- a/Src/Asp.Net/OracleTest/Demo/Demo2_Updateable.cs
+++ b/Src/Asp.Net/OracleTest/Demo/Demo2_Updateable.cs
@@ -16,7 +16,7 @@ namespace OrmTest
 
             SqlSugarClient db = new SqlSugarClient(new ConnectionConfig()
             {
-                DbType = DbType.SqlServer,
+                DbType = DbType.Oracle,
                 ConnectionString = Config.ConnectionString,
                 InitKeyType = InitKeyType.Attribute,
                 IsAutoCloseConnection = true,
@@ -78,8 +78,8 @@ namespace OrmTest
             var dtList = new List<Dictionary<string, object>>();
             dtList.Add(dt);
 
-            var t66 = db.Updateable(dt).AS("[Order]").WhereColumns("id").ExecuteCommand();
-            var t666 = db.Updateable(dtList).AS("[Order]").WhereColumns("id").ExecuteCommand();
+            var t66 = db.Updateable(dt).AS("Order").WhereColumns("id").ExecuteCommand();
+            var t666 = db.Updateable(dtList).AS("Order").WhereColumns("id").ExecuteCommand();
 
 
 
diff --git a/Src/Asp.Net/OracleTest/Demo/Demo3_Insertable.cs b/Src/Asp.Net/OracleTest/Demo/Demo3_Insertable.cs
index e366d0f3e..9e3d43b07 100644
--- a/Src/Asp.Net/OracleTest/Demo/Demo3_Insertable.cs
+++ b/Src/Asp.Net/OracleTest/Demo/Demo3_Insertable.cs
@@ -16,7 +16,7 @@ namespace OrmTest
 
             SqlSugarClient db = new SqlSugarClient(new ConnectionConfig()
             {
-                DbType = DbType.SqlServer,
+                DbType = DbType.Oracle,
                 ConnectionString = Config.ConnectionString,
                 InitKeyType = InitKeyType.Attribute,
                 IsAutoCloseConnection = true,
diff --git a/Src/Asp.Net/OracleTest/Demo/Demo4_Deleteable.cs b/Src/Asp.Net/OracleTest/Demo/Demo4_Deleteable.cs
index 8e39e2013..8d8bdd8b7 100644
--- a/Src/Asp.Net/OracleTest/Demo/Demo4_Deleteable.cs
+++ b/Src/Asp.Net/OracleTest/Demo/Demo4_Deleteable.cs
@@ -16,7 +16,7 @@ namespace OrmTest
 
             SqlSugarClient db = new SqlSugarClient(new ConnectionConfig()
             {
-                DbType = DbType.SqlServer,
+                DbType = DbType.Oracle,
                 ConnectionString = Config.ConnectionString,
                 InitKeyType = InitKeyType.Attribute,
                 IsAutoCloseConnection = true,
diff --git a/Src/Asp.Net/OracleTest/Demo/Demo5_SqlQueryable.cs b/Src/Asp.Net/OracleTest/Demo/Demo5_SqlQueryable.cs
index e98be52a1..fadd3d2a1 100644
--- a/Src/Asp.Net/OracleTest/Demo/Demo5_SqlQueryable.cs
+++ b/Src/Asp.Net/OracleTest/Demo/Demo5_SqlQueryable.cs
@@ -16,7 +16,7 @@ namespace OrmTest
             Console.WriteLine("#### SqlQueryable Start ####");
             SqlSugarClient db = new SqlSugarClient(new ConnectionConfig()
             {
-                DbType = DbType.SqlServer,
+                DbType = DbType.Oracle,
                 ConnectionString = Config.ConnectionString,
                 InitKeyType = InitKeyType.Attribute,
                 IsAutoCloseConnection = true
diff --git a/Src/Asp.Net/OracleTest/Demo/Demo6_Queue.cs b/Src/Asp.Net/OracleTest/Demo/Demo6_Queue.cs
index 666fd27ee..314279be9 100644
--- a/Src/Asp.Net/OracleTest/Demo/Demo6_Queue.cs
+++ b/Src/Asp.Net/OracleTest/Demo/Demo6_Queue.cs
@@ -16,7 +16,7 @@ namespace OrmTest
 
             SqlSugarClient db = new SqlSugarClient(new ConnectionConfig()
             {
-                DbType = DbType.SqlServer,
+                DbType = DbType.Oracle,
                 ConnectionString = Config.ConnectionString,
                 InitKeyType = InitKeyType.Attribute,
                 IsAutoCloseConnection = true,
diff --git a/Src/Asp.Net/OracleTest/Demo/Demo7_Ado.cs b/Src/Asp.Net/OracleTest/Demo/Demo7_Ado.cs
index a4a7ba2db..be5533187 100644
--- a/Src/Asp.Net/OracleTest/Demo/Demo7_Ado.cs
+++ b/Src/Asp.Net/OracleTest/Demo/Demo7_Ado.cs
@@ -16,7 +16,7 @@ namespace OrmTest
 
             SqlSugarClient db = new SqlSugarClient(new ConnectionConfig()
             {
-                DbType = DbType.SqlServer,
+                DbType = DbType.Oracle,
                 ConnectionString = Config.ConnectionString,
                 InitKeyType = InitKeyType.Attribute,
                 IsAutoCloseConnection = true,
diff --git a/Src/Asp.Net/OracleTest/Demo/Demo8_Saveable.cs b/Src/Asp.Net/OracleTest/Demo/Demo8_Saveable.cs
index 79a1ce33a..5afdb3230 100644
--- a/Src/Asp.Net/OracleTest/Demo/Demo8_Saveable.cs
+++ b/Src/Asp.Net/OracleTest/Demo/Demo8_Saveable.cs
@@ -16,7 +16,7 @@ namespace OrmTest
 
             SqlSugarClient db = new SqlSugarClient(new ConnectionConfig()
             {
-                DbType = DbType.SqlServer,
+                DbType = DbType.Oracle,
                 ConnectionString = Config.ConnectionString,
                 InitKeyType = InitKeyType.Attribute,
                 IsAutoCloseConnection = true,
diff --git a/Src/Asp.Net/OracleTest/Demo/Demo9_EntityMain.cs b/Src/Asp.Net/OracleTest/Demo/Demo9_EntityMain.cs
index be795b098..fee0ad0e0 100644
--- a/Src/Asp.Net/OracleTest/Demo/Demo9_EntityMain.cs
+++ b/Src/Asp.Net/OracleTest/Demo/Demo9_EntityMain.cs
@@ -16,7 +16,7 @@ namespace OrmTest
 
             SqlSugarClient db = new SqlSugarClient(new ConnectionConfig()
             {
-                DbType = DbType.SqlServer,
+                DbType = DbType.Oracle,
                 ConnectionString = Config.ConnectionString,
                 InitKeyType = InitKeyType.Attribute,
                 IsAutoCloseConnection = true,
diff --git a/Src/Asp.Net/OracleTest/Demo/DemoA_DbMain.cs b/Src/Asp.Net/OracleTest/Demo/DemoA_DbMain.cs
index 206cd6507..7a36baea8 100644
--- a/Src/Asp.Net/OracleTest/Demo/DemoA_DbMain.cs
+++ b/Src/Asp.Net/OracleTest/Demo/DemoA_DbMain.cs
@@ -16,7 +16,7 @@ namespace OrmTest
 
             SqlSugarClient db = new SqlSugarClient(new ConnectionConfig()
             {
-                DbType = DbType.SqlServer,
+                DbType = DbType.Oracle,
                 ConnectionString = Config.ConnectionString,
                 InitKeyType = InitKeyType.Attribute,
                 IsAutoCloseConnection = true,
diff --git a/Src/Asp.Net/OracleTest/Demo/DemoB_Aop.cs b/Src/Asp.Net/OracleTest/Demo/DemoB_Aop.cs
index 617d682ec..b5405146b 100644
--- a/Src/Asp.Net/OracleTest/Demo/DemoB_Aop.cs
+++ b/Src/Asp.Net/OracleTest/Demo/DemoB_Aop.cs
@@ -16,7 +16,7 @@ namespace OrmTest
 
             SqlSugarClient db = new SqlSugarClient(new ConnectionConfig()
             {
-                DbType = DbType.SqlServer,
+                DbType = DbType.Oracle,
                 ConnectionString = Config.ConnectionString,
                 InitKeyType = InitKeyType.Attribute,
                 IsAutoCloseConnection = true
diff --git a/Src/Asp.Net/OracleTest/Demo/DemoD_DbFirst.cs b/Src/Asp.Net/OracleTest/Demo/DemoD_DbFirst.cs
index db57e0938..46b9c9aba 100644
--- a/Src/Asp.Net/OracleTest/Demo/DemoD_DbFirst.cs
+++ b/Src/Asp.Net/OracleTest/Demo/DemoD_DbFirst.cs
@@ -14,7 +14,7 @@ namespace OrmTest
             Console.WriteLine("#### DbFirst Start ####");
             SqlSugarClient db = new SqlSugarClient(new ConnectionConfig()
             {
-                DbType = DbType.SqlServer,
+                DbType = DbType.Oracle,
                 ConnectionString = Config.ConnectionString,
                 InitKeyType = InitKeyType.Attribute,
                 IsAutoCloseConnection = true
diff --git a/Src/Asp.Net/OracleTest/Demo/DemoE_CodeFirst.cs b/Src/Asp.Net/OracleTest/Demo/DemoE_CodeFirst.cs
index 8692517e1..a73dbfd3e 100644
--- a/Src/Asp.Net/OracleTest/Demo/DemoE_CodeFirst.cs
+++ b/Src/Asp.Net/OracleTest/Demo/DemoE_CodeFirst.cs
@@ -14,12 +14,11 @@ namespace OrmTest
             Console.WriteLine("#### CodeFirst Start ####");
             SqlSugarClient db = new SqlSugarClient(new ConnectionConfig()
             {
-                DbType = DbType.SqlServer,
+                DbType = DbType.Oracle,
                 ConnectionString = Config.ConnectionString3,
                 InitKeyType = InitKeyType.Attribute,
                 IsAutoCloseConnection = true
             });
-            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.Net/OracleTest/Demo/DemoF_Utilities.cs b/Src/Asp.Net/OracleTest/Demo/DemoF_Utilities.cs
index 7db24c350..11706e7af 100644
--- a/Src/Asp.Net/OracleTest/Demo/DemoF_Utilities.cs
+++ b/Src/Asp.Net/OracleTest/Demo/DemoF_Utilities.cs
@@ -16,7 +16,7 @@ namespace OrmTest
 
             SqlSugarClient db = new SqlSugarClient(new ConnectionConfig()
             {
-                DbType = DbType.SqlServer,
+                DbType = DbType.Oracle,
                 ConnectionString = Config.ConnectionString,
                 InitKeyType = InitKeyType.Attribute,
                 IsAutoCloseConnection = true,
diff --git a/Src/Asp.Net/OracleTest/Demo/DemoG_SimpleClient.cs b/Src/Asp.Net/OracleTest/Demo/DemoG_SimpleClient.cs
index 21b7208e8..ce9db7d80 100644
--- a/Src/Asp.Net/OracleTest/Demo/DemoG_SimpleClient.cs
+++ b/Src/Asp.Net/OracleTest/Demo/DemoG_SimpleClient.cs
@@ -16,7 +16,7 @@ namespace OrmTest
 
             SqlSugarClient db = new SqlSugarClient(new ConnectionConfig()
             {
-                DbType = DbType.SqlServer,
+                DbType = DbType.Oracle,
                 ConnectionString = Config.ConnectionString,
                 InitKeyType = InitKeyType.Attribute,
                 IsAutoCloseConnection = true,
diff --git a/Src/Asp.Net/OracleTest/Demo/Democ_GobalFilter.cs b/Src/Asp.Net/OracleTest/Demo/Democ_GobalFilter.cs
index 2406df714..e958c3986 100644
--- a/Src/Asp.Net/OracleTest/Demo/Democ_GobalFilter.cs
+++ b/Src/Asp.Net/OracleTest/Demo/Democ_GobalFilter.cs
@@ -38,7 +38,7 @@ namespace OrmTest
  
         public static SqlSugarClient GetInstance()
         {
-            SqlSugarClient db = new SqlSugarClient(new ConnectionConfig() { DbType = DbType.SqlServer, ConnectionString = Config.ConnectionString, IsAutoCloseConnection = true });
+            SqlSugarClient db = new SqlSugarClient(new ConnectionConfig() { DbType = DbType.Oracle, ConnectionString = Config.ConnectionString, IsAutoCloseConnection = true });
 
             //single table query gobal filter
             db.QueryFilter.Add(new SqlFilterItem()
diff --git a/Src/Asp.Net/OracleTest/Models/Mapper.cs b/Src/Asp.Net/OracleTest/Models/Mapper.cs
index 8d7991d6c..bc0b1ed6a 100644
--- a/Src/Asp.Net/OracleTest/Models/Mapper.cs
+++ b/Src/Asp.Net/OracleTest/Models/Mapper.cs
@@ -30,7 +30,7 @@ namespace OrmTest
     }
     public class ABMapping
     {
-        [SugarColumn(IsPrimaryKey = true, IsIdentity = true)]
+        [SugarColumn(IsPrimaryKey = true,OracleSequenceName = "SEQ_ID")]
         public int AId { get; set; }
         public int BId { get; set; }
         [SugarColumn(IsIgnore = true)]
@@ -41,13 +41,13 @@ namespace OrmTest
     }
     public class A
     {
-        [SugarColumn(IsPrimaryKey = true, IsIdentity = true)]
+        [SugarColumn(IsPrimaryKey = true, OracleSequenceName ="SEQ_ID")]
         public int Id { get; set; }
         public string Name { get; set; }
     }
     public class B
     {
-        [SugarColumn(IsPrimaryKey = true, IsIdentity = true)]
+        [SugarColumn(IsPrimaryKey = true, OracleSequenceName = "SEQ_ID")]
         public int Id { get; set; }
         public string Name { get; set; }
     }
diff --git a/Src/Asp.Net/OracleTest/Models/Order.cs b/Src/Asp.Net/OracleTest/Models/Order.cs
index d7ff068b8..50583871b 100644
--- a/Src/Asp.Net/OracleTest/Models/Order.cs
+++ b/Src/Asp.Net/OracleTest/Models/Order.cs
@@ -9,7 +9,7 @@ namespace OrmTest
 
     public class Order
     {
-        [SugarColumn(IsPrimaryKey = true, IsIdentity = true)]
+        [SugarColumn(IsPrimaryKey = true, OracleSequenceName ="Seq_Id")]
         public int Id { get; set; }
 
         public string Name { get; set; }
diff --git a/Src/Asp.Net/OracleTest/Models/OrderItem.cs b/Src/Asp.Net/OracleTest/Models/OrderItem.cs
index ae3262c7c..bcfba7906 100644
--- a/Src/Asp.Net/OracleTest/Models/OrderItem.cs
+++ b/Src/Asp.Net/OracleTest/Models/OrderItem.cs
@@ -8,7 +8,7 @@ namespace OrmTest
     [SqlSugar.SugarTable("OrderDetail")]
     public class OrderItem
     {
-        [SqlSugar.SugarColumn(IsPrimaryKey =true, IsIdentity =true)]
+        [SqlSugar.SugarColumn(IsPrimaryKey =true, OracleSequenceName = "Seq_Id")]
         public int ItemId { get; set; }
         public int OrderId { get; set; }
         public decimal? Price { get; set; }
diff --git a/Src/Asp.Net/OracleTest/OldTest/Demos/7_Filter.cs b/Src/Asp.Net/OracleTest/OldTest/Demos/7_Filter.cs
index 273f6f814..30f245fbe 100644
--- a/Src/Asp.Net/OracleTest/OldTest/Demos/7_Filter.cs
+++ b/Src/Asp.Net/OracleTest/OldTest/Demos/7_Filter.cs
@@ -39,7 +39,7 @@ namespace OrmTest.Demo
 
         public static SqlSugarClient GetInstance1()
         {
-            SqlSugarClient db = new SqlSugarClient(new ConnectionConfig() { ConnectionString = Config.ConnectionString, DbType = DbType.SqlServer, IsAutoCloseConnection = true });
+            SqlSugarClient db = new SqlSugarClient(new ConnectionConfig() { ConnectionString = Config.ConnectionString, DbType = DbType.Oracle, IsAutoCloseConnection = true });
             db.QueryFilter
              .Add(new SqlFilterItem()
              {
diff --git a/Src/Asp.Net/OracleTest/OldTest/PerformanceTesting/SqlSugarPerformance.cs b/Src/Asp.Net/OracleTest/OldTest/PerformanceTesting/SqlSugarPerformance.cs
index 5299a8813..c2cfbf75f 100644
--- a/Src/Asp.Net/OracleTest/OldTest/PerformanceTesting/SqlSugarPerformance.cs
+++ b/Src/Asp.Net/OracleTest/OldTest/PerformanceTesting/SqlSugarPerformance.cs
@@ -19,7 +19,7 @@ namespace OrmTest.PerformanceTesting
             SqlSugarClient db = new SqlSugarClient(new ConnectionConfig()
             {
                 ConnectionString = Config.ConnectionString,
-                DbType = DbType.SqlServer,
+                DbType = DbType.Oracle,
                 IsAutoCloseConnection = false
             });
             db.IgnoreColumns.Add("TestId", "Student");
diff --git a/Src/Asp.Net/OracleTest/OldTest/UnitTest/Mapping .cs b/Src/Asp.Net/OracleTest/OldTest/UnitTest/Mapping .cs
index db4f2166c..db0383b42 100644
--- a/Src/Asp.Net/OracleTest/OldTest/UnitTest/Mapping .cs	
+++ b/Src/Asp.Net/OracleTest/OldTest/UnitTest/Mapping .cs	
@@ -51,12 +51,12 @@ namespace OrmTest.UnitTest
 
         public new SqlSugarClient GetInstance()
         {
-            SqlSugarClient db = new SqlSugarClient(new ConnectionConfig() { InitKeyType = InitKeyType.Attribute, ConnectionString = Config.ConnectionString, DbType = DbType.SqlServer, IsAutoCloseConnection = true });
+            SqlSugarClient db = new SqlSugarClient(new ConnectionConfig() { InitKeyType = InitKeyType.Attribute, ConnectionString = Config.ConnectionString, DbType = DbType.Oracle, IsAutoCloseConnection = true });
             return db;
         }
         public  SqlSugarClient GetInstance2()
         {
-            SqlSugarClient db = new SqlSugarClient(new ConnectionConfig() { InitKeyType = InitKeyType.Attribute, ConnectionString = Config.ConnectionString, DbType = DbType.SqlServer, IsAutoCloseConnection = true });
+            SqlSugarClient db = new SqlSugarClient(new ConnectionConfig() { InitKeyType = InitKeyType.Attribute, ConnectionString = Config.ConnectionString, DbType = DbType.Oracle, IsAutoCloseConnection = true });
             db.Aop.OnLogExecuting = (sql, pars) =>
             {
                 Console.WriteLine(sql + "\r\n" + db.RewritableMethods.SerializeObject(pars));
diff --git a/Src/Asp.Net/OracleTest/OldTest/UnitTest/Query/JoinQuery.cs b/Src/Asp.Net/OracleTest/OldTest/UnitTest/Query/JoinQuery.cs
index 3ae48fbed..e4d934011 100644
--- a/Src/Asp.Net/OracleTest/OldTest/UnitTest/Query/JoinQuery.cs
+++ b/Src/Asp.Net/OracleTest/OldTest/UnitTest/Query/JoinQuery.cs
@@ -128,7 +128,7 @@ namespace OrmTest.UnitTest
 
         public new SqlSugarClient GetInstance()
         {
-            SqlSugarClient db = new SqlSugarClient(new ConnectionConfig() { ConnectionString = Config.ConnectionString, DbType = DbType.SqlServer });
+            SqlSugarClient db = new SqlSugarClient(new ConnectionConfig() { ConnectionString = Config.ConnectionString, DbType = DbType.Oracle });
             db.Aop.OnLogExecuting = (sql, pars) =>
             {
                 Console.WriteLine(sql + " " + pars);
diff --git a/Src/Asp.Net/OracleTest/OldTest/UnitTest/UnitTestBase.cs b/Src/Asp.Net/OracleTest/OldTest/UnitTest/UnitTestBase.cs
index 1aeea8b30..855a6e78c 100644
--- a/Src/Asp.Net/OracleTest/OldTest/UnitTest/UnitTestBase.cs
+++ b/Src/Asp.Net/OracleTest/OldTest/UnitTest/UnitTestBase.cs
@@ -48,7 +48,7 @@ namespace OrmTest.UnitTest
 
         public SqlSugarClient GetInstance()
         {
-            SqlSugarClient db = new SqlSugarClient(new ConnectionConfig() { ConnectionString = Config.ConnectionString, DbType = DbType.SqlServer, IsAutoCloseConnection = true });
+            SqlSugarClient db = new SqlSugarClient(new ConnectionConfig() { ConnectionString = Config.ConnectionString, DbType = DbType.Oracle, IsAutoCloseConnection = true });
             return db;
         }
     }
diff --git a/Src/Asp.Net/OracleTest/UnitTest/Main.cs b/Src/Asp.Net/OracleTest/UnitTest/Main.cs
index c81b373f5..02034efc6 100644
--- a/Src/Asp.Net/OracleTest/UnitTest/Main.cs
+++ b/Src/Asp.Net/OracleTest/UnitTest/Main.cs
@@ -10,7 +10,7 @@ namespace OrmTest
     {
        public static  SqlSugarClient Db=> new SqlSugarClient(new ConnectionConfig()
         {
-            DbType = DbType.SqlServer,
+            DbType = DbType.Oracle,
             ConnectionString = Config.ConnectionString,
             InitKeyType = InitKeyType.Attribute,
             IsAutoCloseConnection = true,
@@ -28,6 +28,9 @@ namespace OrmTest
         {
             Db.DbMaintenance.TruncateTable<Order>();
             Db.DbMaintenance.TruncateTable<OrderItem>();
+            Db.DbMaintenance.TruncateTable<A>();
+            Db.DbMaintenance.TruncateTable<B>();
+            Db.DbMaintenance.TruncateTable<ABMapping>();
         }
         public static void Init()
         {
diff --git a/Src/Asp.Net/OracleTest/UnitTest/UThread.cs b/Src/Asp.Net/OracleTest/UnitTest/UThread.cs
index 48bf67da5..9ab5dc6f6 100644
--- a/Src/Asp.Net/OracleTest/UnitTest/UThread.cs
+++ b/Src/Asp.Net/OracleTest/UnitTest/UThread.cs
@@ -12,7 +12,7 @@ namespace OrmTest
 
         public static SqlSugarClient simpleDb => new SqlSugarClient(new ConnectionConfig()
         {
-            DbType = DbType.SqlServer,
+            DbType = DbType.Oracle,
             ConnectionString = Config.ConnectionString,
             InitKeyType = InitKeyType.Attribute,
             IsAutoCloseConnection = true,
@@ -27,7 +27,7 @@ namespace OrmTest
         });
         public static SqlSugarClient ssDb => new SqlSugarClient(new ConnectionConfig()
         {
-            DbType = DbType.SqlServer,
+            DbType = DbType.Oracle,
             ConnectionString = Config.ConnectionString,
             InitKeyType = InitKeyType.Attribute,
             IsAutoCloseConnection = true,
@@ -43,7 +43,7 @@ namespace OrmTest
         });
         public static SqlSugarClient singleDb =  new SqlSugarClient(new ConnectionConfig()
         {
-            DbType = DbType.SqlServer,
+            DbType = DbType.Oracle,
             ConnectionString = Config.ConnectionString,
             InitKeyType = InitKeyType.Attribute,
             IsAutoCloseConnection = true,
@@ -58,7 +58,7 @@ namespace OrmTest
         });
         public static SqlSugarClient singleAndSsDb = new SqlSugarClient(new ConnectionConfig()
         {
-            DbType = DbType.SqlServer,
+            DbType = DbType.Oracle,
             ConnectionString = Config.ConnectionString,
             InitKeyType = InitKeyType.Attribute,
             IsAutoCloseConnection = true,
diff --git a/Src/Asp.Net/OracleTest/UnitTest/Updateable.cs b/Src/Asp.Net/OracleTest/UnitTest/Updateable.cs
index 2397d6032..64ec9a824 100644
--- a/Src/Asp.Net/OracleTest/UnitTest/Updateable.cs
+++ b/Src/Asp.Net/OracleTest/UnitTest/Updateable.cs
@@ -43,16 +43,16 @@ namespace OrmTest
             {
                 IsRemind = saveDiary.IsRemind,
             }).Where(it => it.ID == saveDiary.ID).ToSql();
-            UValidate.Check(sql.Key, @"UPDATE [Diary]  SET
-            [IsRemind] =  @Const0    WHERE ( [ID] = @ID1 )", "Updateable");
+            UValidate.Check(sql.Key, @"UPDATE ""DIARY""  SET
+            ""ISREMIND"" =  @Const0    WHERE ( ""ID"" = @ID1 )", "Updateable");
 
 
             sql = Db.Updateable<UnitDiary>().SetColumns(it => new UnitDiary()
             {
                TypeID = saveDiary.TypeID,
             }).Where(it => it.ID == saveDiary.ID).ToSql();
-            UValidate.Check(sql.Key, @"UPDATE [Diary]  SET
-            [TypeID] = @Const0   WHERE ( [ID] = @ID1 )", "Updateable");
+            UValidate.Check(sql.Key, @"UPDATE ""DIARY""  SET
+            ""TYPEID"" = @Const0   WHERE ( ""ID"" = @ID1 )", "Updateable");
 
         }
     }
diff --git a/Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Items/SubAnd.cs b/Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Items/SubAnd.cs
index 07da2a3f6..b45a3d4ee 100644
--- a/Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Items/SubAnd.cs
+++ b/Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Items/SubAnd.cs
@@ -45,6 +45,10 @@ namespace SqlSugar
 
 
             var regex = @"^AND  (\@Const\d+) $";
+            if (this.Context is OracleExpressionContext)
+            {
+                regex = @"^AND  (\:Const\d+) $";
+            }
             if (Regex.IsMatch(result, regex))
             {
                 result = "AND " + this.Context.Parameters.First(it => it.ParameterName == Regex.Match(result, regex).Groups[1].Value).Value;
diff --git a/Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Items/SubWhere.cs b/Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Items/SubWhere.cs
index 3e287c40b..7174e5cfc 100644
--- a/Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Items/SubWhere.cs
+++ b/Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Items/SubWhere.cs
@@ -45,6 +45,10 @@ namespace SqlSugar
 
 
             var regex = @"^WHERE  (\@Const\d+) $";
+            if (this.Context is OracleExpressionContext)
+            {
+                regex = @"^WHERE  (\:Const\d+) $";
+            }
             if (Regex.IsMatch(result, regex))
             {
                 result = "WHERE " + this.Context.Parameters.First(it => it.ParameterName == Regex.Match(result, regex).Groups[1].Value).Value;
diff --git a/Src/Asp.Net/SqlSugar/Realization/Oracle/DbMaintenance/OracleDbMaintenance.cs b/Src/Asp.Net/SqlSugar/Realization/Oracle/DbMaintenance/OracleDbMaintenance.cs
index f09fc43c3..c7d3589b1 100644
--- a/Src/Asp.Net/SqlSugar/Realization/Oracle/DbMaintenance/OracleDbMaintenance.cs
+++ b/Src/Asp.Net/SqlSugar/Realization/Oracle/DbMaintenance/OracleDbMaintenance.cs
@@ -357,7 +357,7 @@ namespace SqlSugar
 
         private List<DbColumnInfo> GetColumnInfosByTableName(string tableName)
         {
-            string sql = "select * from " + tableName + " WHERE 1=2 ";
+            string sql = "select * from " +SqlBuilder.GetTranslationTableName(tableName) + " WHERE 1=2 ";
             var oldIsEnableLog = this.Context.Ado.IsEnableLogEvent;
             this.Context.Ado.IsEnableLogEvent = false;
             using (DbDataReader reader = (DbDataReader)this.Context.Ado.GetDataReader(sql))
diff --git a/Src/Asp.Net/SqlSugar/Realization/Oracle/OracleProvider.cs b/Src/Asp.Net/SqlSugar/Realization/Oracle/OracleProvider.cs
index b0705db10..ecec0cd9f 100644
--- a/Src/Asp.Net/SqlSugar/Realization/Oracle/OracleProvider.cs
+++ b/Src/Asp.Net/SqlSugar/Realization/Oracle/OracleProvider.cs
@@ -16,6 +16,7 @@ namespace SqlSugar
         {
             this.FormatSql = sql =>
             {
+                sql = sql.Replace("+@", "+:");
                 if (sql.HasValue()&&sql.Contains("@")) {
                     var exceptionalCaseInfo = Regex.Matches(sql, @"\'.*?\@.*?\'| [\.,\w]+\@[\.,\w]+ | [\.,\w]+\@[\.,\w]+");
                     if (exceptionalCaseInfo != null) {