This query is used to count the number of drug era records (drug_era_id) for all persons. The input to the query is a value (or a comma-separated list of values) for a number of records per person. If the input is ommitted, all possible values are summarized.
Sample query run:
The following is a sample run of the query. The input parameters are highlighted in blue
Output field list:
Sample output record:
Drug Era >