stringnextKeyValue=Db.Ado.GetString("select keyvalue from tb_export_key where tablename='hand_patient_register'");
stringnextKeyValue=Db.Ado.GetString("select keyvalue from tb_export_key where tablename='hand_patient_register'");
varoldPatientRegisterList=awaitDb.Ado.GetDataTableAsync("select top 1000 patient_register_id,register_doctor,register_date from patient_register where patient_register_id>'{nextKeyValue}' order by patient_register_id asc ");
varoldPatientRegisterList=awaitDb.Ado.GetDataTableAsync($"select top 1000 patient_register_id,register_doctor,register_date from patient_register where patient_register_id>'{nextKeyValue}' order by patient_register_id asc ");