Find patients who have a diagnosis of Acute MI documented at any time in their history and they have a medication with a dose greater than 500 mg and a medication that is taken once a day documented during the same instance.

There are 3 patients who have had

• A medication with a dose of 500 mg and 
• AND a frequency of once a day entered as a fact in the observation_fact table
• Where the medication dose and frequency have the same encounter_num , concept_cd, provider_id, start_date, AND instance_num
• AND the diagnosis of acute MI
• AND the medication dose and frequency all have the same patient_num