diff --git a/Src/Asp.Net/SqlSugar/Abstract/DbFirstProvider/DbFirstProvider.cs b/Src/Asp.Net/SqlSugar/Abstract/DbFirstProvider/DbFirstProvider.cs
index e5d9eab5b..05bdf65c3 100644
--- a/Src/Asp.Net/SqlSugar/Abstract/DbFirstProvider/DbFirstProvider.cs
+++ b/Src/Asp.Net/SqlSugar/Abstract/DbFirstProvider/DbFirstProvider.cs
@@ -329,7 +329,7 @@ namespace SqlSugar
                     }
                     PropertyText = PropertyDescriptionText + PropertyText;
                     classText = classText.Replace(DbFirstTemplate.KeyPropertyName, PropertyText + (isLast ? "" : ("\r\n" + DbFirstTemplate.KeyPropertyName)));
-                    if (ConstructorText.HasValue() && item.DefaultValue != null)
+                    if (ConstructorText.HasValue() && item.DefaultValue != null&&item.IsIdentity!=true)
                     {
                         var hasDefaultValue = columns.Skip(index + 1).Any(it => it.DefaultValue.HasValue());
                         if (item.DefaultValue.EqualCase("CURRENT_TIMESTAMP"))
@@ -345,7 +345,7 @@ namespace SqlSugar
                     }
                 }
             }
-            if (!columns.Any(it => it.DefaultValue != null))
+            if (!columns.Any(it => it.DefaultValue != null&&it.IsIdentity==false))
             {
                 ConstructorText = null;
             }
@@ -570,6 +570,10 @@ namespace SqlSugar
                 return "null";
             }
             string result = this.Context.Ado.DbBind.GetConvertString(item.DataType) + "(\"" + convertString + "\")";
+            if (this.SqlBuilder.SqlParameterKeyWord == ":"&&!string.IsNullOrEmpty(item.OracleDataType)) 
+            {
+                result = this.Context.Ado.DbBind.GetConvertString(item.OracleDataType) + "(\"" + convertString + "\")";
+            }
             return result;
         }
         private string GetPropertyDescriptionText(DbColumnInfo item, string propertyDescriptionText)
diff --git a/Src/Asp.Net/SqlSugar/Realization/Dm/DbMaintenance/DmDbMaintenance.cs b/Src/Asp.Net/SqlSugar/Realization/Dm/DbMaintenance/DmDbMaintenance.cs
index 2267e24f9..5443fa563 100644
--- a/Src/Asp.Net/SqlSugar/Realization/Dm/DbMaintenance/DmDbMaintenance.cs
+++ b/Src/Asp.Net/SqlSugar/Realization/Dm/DbMaintenance/DmDbMaintenance.cs
@@ -482,7 +482,8 @@ WHERE table_name = '" + tableName + "'");
                     var current = columns.FirstOrDefault(it => it.DbColumnName.EqualCase(column.DbColumnName));
                     if (current != null)
                     {
-                        column.OracleDataType = current.DataType; 
+                        column.OracleDataType = current.DataType;
+                        column.DefaultValue = current.DefaultValue?.TrimStart('\'')?.TrimEnd('\'');
                     }
                     result.Add(column);
                 }
@@ -503,7 +504,8 @@ WHERE table_name = '" + tableName + "'");
                                  t1.char_length,   
                                  t1.data_precision,  
                                  t1.data_scale,     
-                                 t1.nullable,       
+                                 t1.nullable, 
+                                 t1.data_default as DefaultValue,
                                  t4.index_name,     
                                  t4.column_position,  
                                  t4.descend