diff --git a/Src/Asp.Net/OracleTest/UnitTest/Main.cs b/Src/Asp.Net/OracleTest/UnitTest/Main.cs
index b241961d9..643fdc8ec 100644
--- a/Src/Asp.Net/OracleTest/UnitTest/Main.cs
+++ b/Src/Asp.Net/OracleTest/UnitTest/Main.cs
@@ -34,11 +34,7 @@ namespace OrmTest
         }
         public static void Init()
         {
-            DeleteTest();
-            CodeFirst();
-            Updateable();
-            Json();
-            Ado();
+            
             Queryable();
             QueryableAsync();
             //Thread();
diff --git a/Src/Asp.Net/OracleTest/UnitTest/UQueryable.cs b/Src/Asp.Net/OracleTest/UnitTest/UQueryable.cs
index 7446e77ea..fd1183818 100644
--- a/Src/Asp.Net/OracleTest/UnitTest/UQueryable.cs
+++ b/Src/Asp.Net/OracleTest/UnitTest/UQueryable.cs
@@ -12,72 +12,21 @@ namespace OrmTest
         public static void Queryable()
         {
 
-            var pageindex = 1;
-            var pagesize = 10;
-            var total = 0;
-            var totalPage = 0;
-            var list = Db.Queryable<Order>().ToPageList(pageindex, pagesize, ref total, ref totalPage);
+           
+          //  Db.CodeFirst.InitTables<UnitTest0012>();
+            Db.Insertable(new UnitTest0012() { ID = "a" }).ExecuteCommand();
+            //Db.Insertable(new UnitTest0012() { ID = "b" }).ExecuteCommand();
+            var x1 = Db.Ado.GetDataTable("SELECT  ID  FROM  UNITTEST0012     ", new SugarParameter("Const0", "a", System.Data.DbType.AnsiStringFixedLength));
 
-            //Db.CodeFirst.InitTables(typeof(CarType));
-            //Db.Updateable<CarType>()
-            //      .SetColumns(it => new CarType { State = SqlSugar.SqlFunc.IIF(it.State == true, false, true) }).Where(it => true)
-            //   .ExecuteCommand();
+     
+            //Db.CurrentConnectionConfig.MoreSettings=new ConnMoreSettings { DisableNvarchar = true };
+            var x = Db.Ado.GetDataTable("SELECT  ID  FROM  UNITTEST0012   WHERE ID = :Const0  ",new SugarParameter("Const0", "a",System.Data.DbType.AnsiStringFixedLength));
+        }
 
-            //Db.CodeFirst.InitTables(typeof(TestTree));
-            //Db.DbMaintenance.TruncateTable<TestTree>();
-            //Db.Ado.ExecuteCommand("insert testtree values(hierarchyid::GetRoot(),geography :: STGeomFromText ('POINT(55.9271035250276 -3.29431266523898)',4326),'name')");
-            //var list2 = Db.Queryable<TestTree>().ToList();
-
-            Db.CodeFirst.InitTables<UnitGuidTable>();
-            Db.Queryable<UnitGuidTable>().Where(it => it.Id.HasValue).ToList();
-
-            Db.Queryable<Order>().Where(it => SqlSugar.SqlFunc.Equals(it.CreateTime.Date, it.CreateTime.Date)).ToList();
-
-           // var sql = Db.Queryable<UnitSelectTest>().Select(it => new UnitSelectTest()
-           // {
-
-           //     DcNull = it.Dc,
-           //     Dc = it.Int
-           // }).ToSql().Key;
-           // UValidate.Check(sql, "SELECT  [Dc] AS [DcNull] , [Int] AS [Dc]  FROM [UnitSelectTest]", "Queryable");
-
-           // sql = Db.Updateable<UnitSelectTest2>(new UnitSelectTest2()).ToSql().Key;
-           // UValidate.Check(sql, @"UPDATE [UnitSelectTest2]  SET
-           //[Dc]=@Dc,[IntNull]=@IntNull  WHERE [Int]=@Int", "Queryable");
-
-           // sql = Db.Queryable<Order>().IgnoreColumns(it => it.CreateTime).ToSql().Key;
-           // UValidate.Check(sql, "SELECT [Id],[Name],[Price],[CustomId] FROM [Order] ", "Queryable");
-           // sql = Db.Queryable<Order>().IgnoreColumns(it => new { it.Id, it.Name }).ToSql().Key;
-           // UValidate.Check(sql, "SELECT [Price],[CreateTime],[CustomId] FROM [Order] ", "Queryable");
-           // sql = Db.Queryable<Order>().IgnoreColumns("id").ToSql().Key;
-           // UValidate.Check(sql, "SELECT [Name],[Price],[CreateTime],[CustomId] FROM [Order] ", "Queryable");
-
-            var cts = IEnumerbleContains.Data();
-            var list2=Db.Queryable<Order>()
-                    .Where(p => /*ids.*/cts.Select(c => c.Id).Contains(p.Id)).ToList();
-
-            var cts2 = IEnumerbleContains.Data().ToList(); ;
-            var list3 = Db.Queryable<Order>()
-                    .Where(p => /*ids.*/cts2.Select(c => c.Id).Contains(p.Id)).ToList();
-
-
-            var list4 = Db.Queryable<Order>()
-                .Where(p => new List<int> { 1, 2, 3 }.Where(b => b > 1).Contains(p.Id)).ToList();
-
-            Db.CodeFirst.InitTables<UnitTest3>();
-            var list5 = Db.Queryable<UnitTest3>().Where(it => SqlSugar.SqlFunc.ToString(it.Date.Value.Year) == "1").ToList();
-            var list6 = Db.Queryable<UnitTest3>().Where(it => it.Date.Value.Year == 1).ToList();
-            var list7 = Db.Queryable<UnitTest3>().Where(it => it.Date.Value.Date == DateTime.Now.Date).ToList();
-
-
-            SaleOrder saleOrderInfo = new SaleOrder();
-            Db.CodeFirst.InitTables<SaleOrder>();
-            var result = Db.GetSimpleClient<SaleOrder>().Update(o => new SaleOrder()
-            {
-                OrderStatus = 1,
-                CheckMan = saleOrderInfo.CheckMan,
-                CheckTime = DateTime.Now
-            }, o => o.OrderSn == saleOrderInfo.OrderSn && o.OrderStatus != 1);
+        public class UnitTest0012
+        {
+            [SugarColumn(ColumnDataType ="char(10)")]
+            public string ID { get; set; }
         }
 
         public static class IEnumerbleContains
diff --git a/Src/Asp.Net/SqlSugar/Realization/Oracle/OracleProvider.cs b/Src/Asp.Net/SqlSugar/Realization/Oracle/OracleProvider.cs
index fbc47602b..db3c06f57 100644
--- a/Src/Asp.Net/SqlSugar/Realization/Oracle/OracleProvider.cs
+++ b/Src/Asp.Net/SqlSugar/Realization/Oracle/OracleProvider.cs
@@ -165,6 +165,11 @@ namespace SqlSugar
                     sqlParameter.Value = parameter.Value;
                     sqlParameter.DbType = System.Data.DbType.Date;
                 }
+                else if (parameter.DbType == System.Data.DbType.AnsiStringFixedLength) 
+                {
+                    sqlParameter.DbType = System.Data.DbType.AnsiStringFixedLength;
+                    sqlParameter.Value = parameter.Value;
+                }
                 else
                 {
                     if (parameter.Value != null && parameter.Value.GetType() == UtilConstants.GuidType)