text: select c1.concept_id as concept_id,
  	num.stratum_2 as x_calendar_month,
  	round(1000*(1.0*num.count_value/denom.count_value),5) as y_prevalence_1000pp
  from 
  	(select * from ACHILLES_results where analysis_id = 902) num
  	inner join
  	(select * from ACHILLES_results where analysis_id = 117) denom
  	on num.stratum_2 = denom.stratum_1  
  	inner join
  	@cdmSchema.dbo.concept c1
  	on num.stratum_1 = CAST(c1.concept_id as VARCHAR)
  ORDER BY CAST(num.stratum_2 as INT)