Transposing SQLite rows and columns with average per hour

Question

I have a table in SQLite called param_vals_breaches that looks like the following:

id    param       queue       date_time              param_val    breach_c         


        

Answer 1

SQLite does not have a PIVOT function but you can use an aggregate function with a CASE expression to turn the rows into columns:

select param,
  avg(case when time = '00' then param_val end) AvgHour0Val,
  avg(case when time = '00' then breach_count end) AvgHour0Count,
  avg(case when time = '01' then param_val end) AvgHour1Val,
  avg(case when time = '01' then breach_count end) AvgHour1Count,
  avg(case when time = '02' then param_val end) AvgHour2Val,
  avg(case when time = '02' then breach_count end) AvgHour2Count
from
(
  select param,
    strftime('%H', date_time) time,
    param_val,
    breach_count
  from param_vals_breaches
  where queue = 'a'
) src
group by param;

See SQL Fiddle with Demo