Obtenha o ID mínimo e o valor máximo do ID no MySQL php

String MiNtimeIn,MaXtimeOut;
JSONArray array=new JSONArray(json);
if(array.length()<2){
  JSONObject jsonObject = array.getJSONObject(0);
  MiNtimeIn = jsonObject.optString(Configs.TAG_IN);
  MaXtimeOut=jsonObject.optString(Configs.TAG_OUT);
}else{
  // get First Object from JSONArray
   JSONObject oneObject = array.getJSONObject(0);
  MiNtimeIn = oneObject.optString(Configs.TAG_IN); // get min from first row
  // get Second Object from JSONArray
   JSONObject twoObject = array.getJSONObject(array.length()-1);
   MaXtimeOut = twoObject.optString(Configs.TAG_OUT); // get min from second row
}