diff --git a/Src/Asp.Net/OracleTest/Demo/Demo1_Queryable.cs b/Src/Asp.Net/OracleTest/Demo/Demo1_Queryable.cs
index 13aecd01f..154b4ed87 100644
--- a/Src/Asp.Net/OracleTest/Demo/Demo1_Queryable.cs
+++ b/Src/Asp.Net/OracleTest/Demo/Demo1_Queryable.cs
@@ -83,6 +83,8 @@ namespace OrmTest
                 names = $"as{it.Id}fd{it.Id}a"
             })
            .ToList();
+            var xx =DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff");
+            var test11= db.Queryable<Order>().Select(it =>   Convert.ToDateTime(xx)).ToList();
             Console.WriteLine("#### Examples End ####");
         }
 
diff --git a/Src/Asp.Net/SqlSugar/Realization/Oracle/SqlBuilder/OracleExpressionContext.cs b/Src/Asp.Net/SqlSugar/Realization/Oracle/SqlBuilder/OracleExpressionContext.cs
index b2111fe63..4f4869e8f 100644
--- a/Src/Asp.Net/SqlSugar/Realization/Oracle/SqlBuilder/OracleExpressionContext.cs
+++ b/Src/Asp.Net/SqlSugar/Realization/Oracle/SqlBuilder/OracleExpressionContext.cs
@@ -269,8 +269,9 @@ namespace SqlSugar
         public override string ToDate(MethodCallExpressionModel model)
         {
             var parameter = model.Args[0];
-            return string.Format(" cast({0} as TIMESTAMP)", parameter.MemberName);
+            return string.Format(" TO_TIMESTAMP({0}, 'YYYY-MM-DD HH24:MI:SS.FF') ", parameter.MemberName);
         }
+
         public override string ToDateShort(MethodCallExpressionModel model)
         {
             var parameter = model.Args[0];