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Quick Summary
Identify policy holders who have made three or more support calls.
Aggregate call volumes grouped by policy holder ID.
Count the total number of policy holders meeting the frequency threshold.
What This Tests
Grouping data by a categorical column
Aggregating row counts using aggregate functions
Filtering aggregated groups based on conditions
Counting rows resulting from a filtered aggregation
Common Patterns
Aggregation
HAVING Filter
Subquery
Groupby
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Accepted
13
/18
Acceptance Rate
72.2%
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