Update oracle

Src/Asp.Net/SqlSugar/Realization/Oracle/SqlBuilder/OracleInsertBuilder.cs

@@ -121,7 +121,7 @@ namespace SqlSugar
                     {
                         date = Convert.ToDateTime("1900-1-1");
                     }
-                    return "to_date('" + date.ToString("yyyy-MM-dd HH:mm:ss") + "', 'YYYY-MM-DD HH24:MI:SS') ";
+                    return "to_timestamp('" + date.ToString("yyyy-MM-dd HH:mm:ss.ffffff") + "', 'YYYY-MM-DD HH24:MI:SS.FF') ";
                 }
                 else if (type.IsEnum())
                 {
@@ -139,7 +139,7 @@ namespace SqlSugar
                 else if (type==UtilConstants.DateTimeOffsetType) 
                 {
                     var date= UtilMethods.ConvertFromDateTimeOffset((DateTimeOffset)value);
-                    return "to_date('" + date.ToString("yyyy-MM-dd HH:mm:ss") + "', 'YYYY-MM-DD HH24:MI:SS') ";
+                    return "to_timestamp('" + date.ToString("yyyy-MM-dd HH:mm:ss.ffffff") + "', 'YYYY-MM-DD HH24:MI:SS.FF') ";
                 }
                 else if (type == UtilConstants.StringType || type == UtilConstants.ObjType)
                 {