MySQL: Get start & end timestamp for each day

Question

Similar to the question at MYSQL: Find Start and End Timestamp of a consecutive count, I have a table with similar data:

StatusTime          | Reading   
2014-01-01 0         


        

Answer 1

Try this code:

  select *
    (select max(StatusTime) from tbl where Reading > 50) above_50,
    (select min(StatusTime) from tbl where Reading < 50) bellow_50;