title: How can I condition the time column?
body: <p>There is a column representing 24 hours.
  Data comes in every 15 minutes.
  For example, at 10:15, the value is entered in the DateTime column of the 10H column.
  But... The client wants to set the standard for the day at 6:30 a.m. and set it to 6:30 the next day.
  If you look at the column below, should sum the value from column 6h.. Is there any way?</p>
  <pre><code>DateTime             0H  1H   ..6H....7H...8H..9H..10H..~23H
  2020 11 10 00:00:00  979 958 
  2020 11 10 00:15:00  987 954 
  2020 11 10 00:30:00  987 958 
  2020 11 10 00:45:00  960 956 
  2020 11 11 00:00:00    0 0 
  2020 11 11 00:15:00    0 0 
  2020 11 11 00:30:00    0 0 
  2020 11 11 00:45:00    0 0 
  2020 11 12 00:00:00  995 995 
  2020 11 12 00:15:00  991 993 
  2020 11 12 00:30:00 1000 993 
  2020 11 12 00:45:00  993 996 
  </code></pre>
  <p><a href="https://i.stack.imgur.com/931Wc.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/931Wc.png" alt="enter image description here" /></a></p>
  <pre><code>I want value
  2020-11-15 06:30 ~ 2020-11-16 06:30 values sum
  </code></pre>