text: -- 230 Number of visit_occurrence records inside a valid observation period
  
  SELECT 
  	230 AS analysis_id,
  	CAST(NULL AS VARCHAR(255)) AS stratum_1,
  	CAST(NULL AS VARCHAR(255)) AS stratum_2,
  	CAST(NULL AS VARCHAR(255)) AS stratum_3,
  	CAST(NULL AS VARCHAR(255)) AS stratum_4,
  	CAST(NULL AS VARCHAR(255)) AS stratum_5,
  	COUNT_BIG(*) AS count_value
  INTO 
  	@scratchDatabaseSchema@schemaDelim@tempAchillesPrefix_230
  FROM 
  	@cdmDatabaseSchema.visit_occurrence vo
  LEFT JOIN 
  	@cdmDatabaseSchema.observation_period op 
  ON 
  	vo.person_id = op.person_id
  AND 
  	vo.visit_start_date >= op.observation_period_start_date
  AND 
  	vo.visit_start_date <= op.observation_period_end_date
  ;
  