title: InfluxDB : single or multiple measurement
body: <p>I'm a beginner with influxDB and after reading the <a href="https://docs.influxdata.com/influxdb/v1.7/concepts/schema_and_data_layout/" rel="noreferrer">Schema design</a> documentation a question remain.</p>
  <p>How to decide if you should use one measurement with multiple fields or multiple measurement with single field ?</p>
  <p>I have multiple iot device which send every minute datas (temperature,humidity, pressure). All this datas have the exact same timestamp.</p>
  <p>So i was wondering if d rather create one measurement like this :</p>
  <pre><code>    timestamp,iotid,temperature,humidity,pressure
  -------------------------------------------------
      1501230195,iot1,70,         45,      850
  </code></pre>
  <p>Or 3 measurements (one for each value) , with the same tags but only one field in it ?</p>
  <pre><code>timestamp,iotid,temperature
  ----------------------------
      1501230195,iot1,70
  
  timestamp,iotid,humidity
  -------------------------
      1501230195,iot1,45
  
  timestamp,iotid,pressure
  -------------------------
      1501230195,iot1,850
  </code></pre>
  <p>Query-wise, i could retrieve only one value but also the 3 at the same time.</p>