title: php mysql : storing only 1 data at time period
body: <p>I'm wondering if anyone can suggest a good way to store one data ina a period of time in a mysql database?</p>
  
  <p>Note that I'm referring to a PERIOD of time, not just a datetime. Like.. an hour. Or a day and a half. Or two weeks. Or a year.</p>
  
  <p>Specifically I want to store only one data of time periods every two hours if i had a period of time, at 8am-10pm, 10am-12pm, 12pm-14pm, </p>
  
  <p>Can I do that in php or mysql?</p>