title: how data stored in b-tree for composite key in mysql? i want to know about tree representation of data
body: <p>how b-tree looks like for below composite key?
  primary key(imei_no,data_received_time)</p>
  
  <p>both imei_no and data_received_time are bigInt.</p>
  
  <p>plz give answer with example.</p>