private DataExecutor()
{
_select = new DataSelectExecutor();
_delete = new DataDeleteExecutor();
_insert = new DataInsertExecutor();
_update = new DataUpdateExecutor();
_upsert = new DataUpsertExecutor();
_exist = new DataExistExecutor();
_execution = new DataExecuteExecutor();
_aggregate = new DataAggregateExecutor();
}