title: First and Last Dates in block of continuous dates
body: <p>I need to figure out how to capture these blocks in my data.  I currently have a query that is capturing the first and last date for each day.  The blocks in each day need to be separated.  I want to capture the Min and Max date for each block, tech, day and count of blocks (30 min segments) from the first date to the last day.  Thanks for answers!</p>
  <p><a href="https://i.stack.imgur.com/BTF5C.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/BTF5C.jpg" alt="data sample" /></a></p>